Pretest: AP Physics Quiz

A car accelerates uniformly from rest to a speed of 30 m/s in 10 seconds. What is the car's acceleration?

• 2 m/s²

• 3 m/s²

• 4 m/s²

• 5 m/s²

What is the net force acting on a 10 kg object accelerating at 2 m/s²?

• 5 N

• 10 N

• 15 N

• 20 N

A ball is thrown vertically upward with an initial velocity of 20 m/s. What is the maximum height it reaches? (g = 9.8 m/s²)

• 20.4 m

• 30.6 m

• 40.8 m

• 50.0 m

If a force of 50 N is applied to push a 5 kg block on a frictionless surface, what is the block's acceleration?

• 5 m/s²

• 10 m/s²

• 15 m/s²

• 20 m/s²

A 0.2 kg ball is dropped from a height of 10 m. What is its kinetic energy just before hitting the ground? (g = 9.8 m/s²)

• 9.8 J

• 19.6 J

• 29.4 J

• 39.2 J

A force of 100 N is applied to a spring with a spring constant of 200 N/m. How much is the spring compressed?

• 0.25 m

• 0.50 m

• 0.75 m

• 1.00 m

A car of mass 1500 kg is moving at a speed of 20 m/s. What is its momentum?

• 15,000 kg·m/s

• 30,000 kg·m/s

• 45,000 kg·m/s

• 60,000 kg·m/s

Two objects collide and stick together. Which of the following quantities is conserved in this inelastic collision?

• Kinetic energy

• Momentum

• Both kinetic energy and momentum

• Neither kinetic energy nor momentum

A 10 kg mass is suspended by a spring and stretches it by 0.5 m. What is the spring constant?

An object is in free fall near the surface of the Earth. What is the object's acceleration? (Neglect air resistance)

• 8.0 m/s²

• 9.8 m/s²

• 10.0 m/s²

• 11.2 m/s²