AP Physics 1 Review

Which of the following correctly ranks the energy dissipated in the three resistors during a given time interval?

• E₃₀₀ > E₂₀₀ > E₁₀₀

• E₃₀₀ > E₁₀₀ > E₂₀₀

• E₂₀₀ > E₃₀₀ > E₁₀₀

• E₂₀₀ > E₁₀₀ > E₃₀₀

A car takes 4 s to come to rest while traveling 20 m at constant acceleration. Can the speed of the car immediately before the brakes were applied be determined without first determining the car's acceleration?

• Yes, by dividing the distance (20 m) by the time (4s).

• Yes, by determining the average speed while braking and doubling it.

• No, because the acceleration is need to use standard kinematics equations.

• No, because the fundamental relationship that defines velocity contains acceleration.

While traveling in an elliptical orbit around the Sun, Mars gains speed when it is closest to the Sun. Which of the following best explains this phenomenon?

• As Mars gets closer to the Sun, the Mars-Sun system loses potential energy and gains kinetic energy.

• A component of the gravitational force is perpendicular to the direction of motion and causes a gain in speed.

• Torque exerted on Mars by the Sun during this segment increases the Mars-Sun system's angular momentum.

• The centripetal force exerted on Mars is greater than the gravitational force during this segment of the orbit.

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

A marble moves across the floor for a marble moving in one dimension. Which describes the motion of the marble?

• Rolling along the floor and bouncing off a wall.

• Rolling down one side of a bowl and then rolling up the other side.

• Rolling up a ramp and then rolling back down.

• Falling and then bouncing elastically off a hard floor.

Tags

NGSS.HS-PS2-1

A race car goes around a flat, unbanked circular track and gradually increases speed as it completes one full trip around the track. Which of the following can explain why the car gains speed?

• Energy stored in the fuel is converted to mechanical energy.

• A component of the frictional force exerted by the ground on the tires is directed toward the center of the circle.

• A component of the frictional force exerted by the ground on the tires is in the direction of motion.

• The car's velocity and acceleration are perpendicular.

Tags

NGSS.HS-PS2-1

Students use standing harmonic waves in an open tube to create the following graph. How could the graph be used to calculate the speed of sound in air?

• There is no way to use the graph to calculate speed

• Slope of the best-fit line between 0.2 and 0.4 m wavelengths

• 1/Slope of the best-fit line between 0.2 and 0.4 m wavelengths

• Area under the curve of the trapezoidal region between 0.2 and 0.4 m

Tags

NGSS.HS-PS4-1

What is the net work done on the object over the distance shown?

• F_od

• 3F_od/2

• 2F_od

• 4F_od

Tags

NGSS.HS-PS3-1

A child of mass M is on a platform of mass 2M that is rotating, frictionlessly, counterclockwise. Which describes an action that will increase the angular speed of the platform-child system and gives the correct reason why?

• The child walks inward, increasing the total angular momentum.

• The child walks inward, decreasing the rotational inertia.

• The child walks outward, increasing the total angular momentum.

• The child walks outward, decreasing the rotational inertia.

The figure shows the forces on a block sliding on a surface. The coefficient of the block and surface is 0.20. The acceleration of the block is most nearly

• 1.0 m/s² right

• 1.0 m/s² left

• 2.0 m/s² right

• 2.0 m/s² left

Tags

NGSS.HS-PS2-1

Students are asked to use the set up shown to determine the mass of block B. They plan to measure the time it takes A to reach the floor. Assuming a light string and a light pulley, what other measurements must they make to determine B's mass?

• Only the mass of A

• Only the distance A falls to reach the floor

• Only the mass of A and the distance it falls to reach the floor

• The mass of A, the distance A falls, and the radius of the pulley

Tags

NGSS.HS-PS2-1