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) about 50 m/s
B) about 80 m/s
C) about 100 m/s
D) about 110 m/s
Answer: A
Learn More :
Physics
- A disco ball falls from the midpoint of the ceiling of a moving van. It lands
- 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?
- What is the acceleration of a freely falling object
- When you yank a table cloth out from under your dishes you are demonstrating
- As an object falls
- A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is
- 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 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
- Joe pushes Bill, who is asleep. Bill
- Earth pulls on the moon. Similarly the moon pulls on Earth, evidence that
- As a ball falls, the action force is the pull of Earth on the ball. The reaction 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 large and a small person wish to parachute at equal terminal velocities. The larger person will have to
- A skydiver's terminal velocity will be greatest if she falls
- A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration
- When a falling object has reached its terminal velocity, its acceleration is
- 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 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 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 rock is thrown vertically into the air. At the very top of its trajectory the net force on it is
- 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
- An object following a straight-line path at constant speed
- The mass of a pet turtle that weighs 10 N is
- 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?
- An apple at rest weighs 1 N. The net force on the apple when it is in free fall is