Physics Quiz on Energy and Motion

A roller coaster car with a mass of 500 kg is at the top of a hill. If the car has a gravitational potential energy of 196,000 J at the top, how high is the hill? (Assume g = 9.8 m/s²)

• 50 m

• 40 m

• 20 m

• 30 m

A 0.2 kg ball is thrown vertically upward with an initial speed. If its kinetic energy at the point of release is 40 J, what is the initial speed of the ball?

• 15 m/s

• 25 m/s

• 20 m/s

• 30 m/s

A car of mass 800 kg is moving with a certain speed. If the car's kinetic energy is 90,000 J, what is its speed?

• 20 m/s

• 15 m/s

• 10 m/s

• 25 m/s

A pendulum bob of mass 0.75 kg is raised to a certain height above its lowest point. If the potential energy of the pendulum at this height is 11.025 J, what is the height of the pendulum bob? (Assume g = 9.8 m/s²)

• 2 m

• 1.5 m

• 1 m

• 0.5 m

A spring with a spring constant of 200 N/m is compressed. If the potential energy stored in the spring is 1 J, by how much is the spring compressed?

• 0.05 m

• 0.1 m

• 0.15 m

• 0.2 m

A car accelerates uniformly from rest and reaches a speed of 25 m/s in 10 seconds. Calculate the car's acceleration.

• 2.5 m/s²

• 2.0 m/s²

• 1.5 m/s²

• 3.0 m/s²

A ball is thrown horizontally from the top of a cliff with an initial speed of 10 m/s. If it takes 3.03 seconds to reach the ground, what is the height of the cliff? (Ignore air resistance, g = 9.8 m/s²)

• 30 m

• 45 m

• 60 m

• 75 m

A car traveling at 20 m/s comes to a stop in 5 seconds. What is the car's deceleration?

• -4 m/s²

• -3 m/s²

• -5 m/s²

• -6 m/s²

A cyclist travels at a constant velocity for 8 seconds and covers a distance of 96 meters. What is the cyclist's velocity?

• 12 m/s

• 15 m/s

• 10 m/s

• 8 m/s

A train starts from rest and travels with a constant acceleration. If it covers a distance of 100 meters in the first 10 seconds, what is the train's acceleration?

• 1 m/s²

• 2 m/s²

• 3 m/s²

• 4 m/s²