A disco ball falls from the midpoint of the ceiling of a moving van. It lands

A disco ball falls from the midpoint of the ceiling of a moving van. It lands  A) at a point in front of the midpoint B) at a point behind the...

A package falls out of an airplane that is traveling at 300m/s. Neglecting air resistance, what is its horizontal velocity before hitting the ground?

A package falls out of an airplane that is traveling at 300m/s. Neglecting air resistance, what is its horizontal velocity before hitting the ground?  A)...

What is the acceleration of a freely falling object

What is the acceleration of a freely falling object  A) 10m/s^2 B) 0m/s^2 C) 5m/s^2 Answer:...

When you yank a table cloth out from under your dishes you are demonstrating

When you yank a table cloth out from under your dishes you are demonstrating  A) impulse B) inertia C) gravity D) momentum Answer:...

As an object falls

As an object falls  A) its velocity increases B) its acceleration increases Answer:...

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is  A) greater on the bug. B) greater on the car. C)...

A vehicle that weights 400 N on the surface of the Earth is traveling in outer space at a speed of 400 m/s . It can be stopped by applying a constant force of 20 N for

A vehicle that weights 400 N on the surface of the Earth is traveling in outer space at a speed of 400 m/s . It can be stopped by applying a constant...

A horse exerts 500N of force on a heavy wagon. The wagon pulls back on the horse with an equal force. The wagon still accelerates because

A horse exerts 500N of force on a heavy wagon. The wagon pulls back on the horse with an equal force. The wagon still accelerates because  A)...

Joe pushes Bill, who is asleep. Bill

Joe pushes Bill, who is asleep. Bill  A) does not push even after he wakes up B) pushes Joe equally hard even without waking up C) will ineviable...

Earth pulls on the moon. Similarly the moon pulls on Earth, evidence that

Earth pulls on the moon. Similarly the moon pulls on Earth, evidence that  A) these two pulls comprise an action-reaction pair. B) Earth is...

As a ball falls, the action force is the pull of Earth on the ball. The reaction force is the

As a ball falls, the action force is the pull of Earth on the ball. The reaction force is the  A) air resistance acting against the ball. B)...

A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. The reaction to this force is the

A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. The reaction to this force is the  A)...

A large and a small person wish to parachute at equal terminal velocities. The larger person will have to

A large and a small person wish to parachute at equal terminal velocities. The larger person will have to  A) jump first from the plane. B)...

A skydiver's terminal velocity will be greatest if she falls

A skydiver's terminal velocity will be greatest if she falls  A) head first. B) lying flat on her back. C) lying flat on her stomach. D) with...

A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration

A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration  A) increases. B) decreases. C) remains unchanged...

When a falling object has reached its terminal velocity, its acceleration is

When a falling object has reached its terminal velocity, its acceleration is  A) constant. B) zero. C) g. Answer:...

A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds. The speed of the car just before the brakes were applied was

A 2000-kg car experiences a braking force of 10,000 N and skids to a stop in 6 seconds. The speed of the car just before the brakes were applied was  A)...

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration in meters per second per second of the car?

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration in meters per second per second of the...

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration in meters per second per second when taking off?

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration in meters per second per second...

A rock is thrown vertically into the air. At the very top of its trajectory the net force on it is

A rock is thrown vertically into the air. At the very top of its trajectory the net force on it is  A) less than its weight. B) more than its...

Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom

Neglecting friction, a large block of ice and a small block of ice start sliding down an incline together. The heavier block will get to the bottom  A)...

An object following a straight-line path at constant speed

An object following a straight-line path at constant speed  A) has a net force acting upon it in the direction of motion. B) has zero acceleration. C)...

The mass of a pet turtle that weighs 10 N is

The mass of a pet turtle that weighs 10 N is  A) about 1 kg. B) about 10 kg. C) about 100 kg. D) about 1000 kg. E) none of these Answer:...

A girl pulls on a 10-kg wagon with a constant horizontal force of 30 N. If there are no other horizontal forces, what is the wagon's acceleration in meters per second per second?

A girl pulls on a 10-kg wagon with a constant horizontal force of 30 N. If there are no other horizontal forces, what is the wagon's acceleration in...

An apple at rest weighs 1 N. The net force on the apple when it is in free fall is

An apple at rest weighs 1 N. The net force on the apple when it is in free fall is  A) 0 N. B) 0.1 N. C) 1 N. D) 9.8 N. E) none of these Answer:...

A 10-N falling object encounters 4 N of air resistance. The net force on the object is

A 10-N falling object encounters 4 N of air resistance. The net force on the object is  A) 0 N. B) 4 N. C) 6 N. D) 10 N. E) none of these Answer:...

The force of friction on a sliding object is 10 newtons. The applied force needed to maintain a constant velocity is

The force of friction on a sliding object is 10 newtons. The applied force needed to maintain a constant velocity is  A) more than 10 N. B) less...

An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would be

An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would be  A) half as...

The Newtone is a unit of

The Newtone is a unit of  A) density B) mass C) inertia D) force Answer:...

Strange as it may seem, it is just as hard to accelerate a car on a level surface on the moon as it is here on the Earth. This is because

Strange as it may seem, it is just as hard to accelerate a car on a level surface on the moon as it is here on the Earth. This is because  A)...

If one object has twice as much mass as another object, it also has twice as much

If one object has twice as much mass as another object, it also has twice as much  A) inertia. B) velocity. C) acceleration due to gravity. D)...

An object maintains a constant acceleration unless there is a change in

An object maintains a constant acceleration unless there is a change in  A) its mass B) the air resistance C) the applied force D) any of the...

A ball is thrown upwards. Neglecting air resistance, what initial upward speed does the ball need to remain in the air for a total time of 10 seconds?

A ball is thrown upwards. Neglecting air resistance, what initial upward speed does the ball need to remain in the air for a total time of 10 seconds?  A)...

A bullet is dropped from the top of the Empire State Building while another bullet is fired downward from the same location. Neglecting air resistance, the acceleration of

A bullet is dropped from the top of the Empire State Building while another bullet is fired downward from the same location. Neglecting air resistance,...

A car accelerates at 2 meters per second per second. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 30 m/s?

A car accelerates at 2 meters per second per second. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 30 m/s?  A)...

Disregarding air resistance, objects fall with constant

Disregarding air resistance, objects fall with constant  A) velocity. B) speed. C) acceleration. D) distances each successive second. Answer:...

At one instant a heavy object in air is moving upward at 50 meters per second. One second later its speed is approximately

At one instant a heavy object in air is moving upward at 50 meters per second. One second later its speed is approximately  A) 40 m/s. B) 50...

An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration in meters per second per second is approximately

An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third...

A ball tossed vertically upwards rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always

A ball tossed vertically upwards rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the...

If a rocket initially at rest accelerates at a rate of 50 m/s^2 for one minute, its speed will be

If a rocket initially at rest accelerates at a rate of 50 m/s^2 for one minute, its speed will be  A) 3600 m/s B) 50 m/s C) 500 m/s D) 3000 m/s Answer:...

A heavy object and a light object are dropped at the same time from rest in a vacum. The heavier object reaches the ground

A heavy object and a light object are dropped at the same time from rest in a vacum. The heavier object reaches the ground  A) later than the...

The two measurements necessary for calculating average speed are

The two measurements necessary for calculating average speed are  A) acceleration and time. B) velocity and time. C) distance and time. D)...

If an object moves with constant acceleration, its velocity must

If an object moves with constant acceleration, its velocity must  A) be constant also. B) change by the same amount each second. C) change...

While an object near the Earth's surface is in free fall, its

While an object near the Earth's surface is in free fall, its  A) velocity increases. B) acceleration increases. C) mass increases. D) mass decreases. Answer:...

A horse gallops a distance of 10 kilometers in a time of 30 minutes. It's average speed is

A horse gallops a distance of 10 kilometers in a time of 30 minutes. It's average speed is  A) 20 km/h B) 15 km/h C) 30 km/h D) 40 km/h Answer:...

The last instant just before an airplane crashes a passenger jumps out the door and falls only two feet to the ground. The passenger

The last instant just before an airplane crashes a passenger jumps out the door and falls only two feet to the ground. The passenger  A) lucky...

If no external forces are acting on a moving object, it will

If no external forces are acting on a moving object, it will  A) continue moving at the same speed. B) continue moving at the same velocity. C)...

When a rocket ship accelerating in outer space runs out of fuel, it

When a rocket ship accelerating in outer space runs out of fuel, it  A) accelerates for a short time, then slows down to a constant velocity. B)...

A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is

A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground...

The gain in speed each second for a freely-falling object is about

The gain in speed each second for a freely-falling object is about  A) 0 B) 10 m/s C) 5 m/s D) 20 m/s Answer:...

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that  A)...