AP Physics Unit 1 Quiz

An object is thrown with an initial speed v near the surface of Earth. Assume that air resistance is negligible and the gravitational field is constant.
If the object is thrown vertically upward, the direction and magnitude of its acceleration while it is in the air is?

• upward and decreasing

• upward and constant

• downward and decreasing

• downward and increasing

• downward and constant

Tags

NGSS.HS-PS2-1

An object is thrown with an initial speed v near the surface of Earth. Assume that air resistance is negligible and the gravitational field is constant.
An object is thrown with an initial speed u near the surface of Earth. Assume that air resistance is negligible and the gravitational field is constant.

If the object is thrown horizontally, the direction and magnitude of its acceleration while it is in the air is

• upward and decreasing

• upward and constant

• downward and decreasing

• downward and increasing

• downward and constant

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

The graphs above represent the position x, velocity v, and acceleration as a function of time t for a marble moving in one dimension. Which of the following could describe the motion of the marble?

• Rolling along the floor and then 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 small cart is rolling freely on an inclined ramp with a constant acceleration of 0.50 m/s2 in the -x direction. At time t = 0, the cart has a velocity of 2.0 m/s in the +x-direction. If the cart never leaves the ramp, which of the following statements correctly describes the motion of the cart at a time t > 5 s?

• The cart is traveling in the +x-direction and is slowing down.

• The cart is traveling in the +x-direction and is speeding up

• The cart is traveling in the -x-direction and is slowing down.

• The cart is traveling in the -x-direction and is speeding up.

Tags

NGSS.HS-PS2-1

A motion sensor is used to create the graph of a student's horizontal velocity as a function of time as the student moves toward and away from the sensor, as shown above. The positive direction is defined as the direction away from the sensor. Which of the following describes the student's final position xf in relation to the starting position x0 and the student's average horizontal acceleration ax between 0.0s and 3.0S?

• Position xf is farther away from the sensor than x0, and ax is positive.

• Position xf is farther away from the sensor than x0, and ax is negative.

• Position xf is closer to the sensor than x0, and ax is positive.

• Position xf is closer to the sensor than x0, and ax is negative.

Tags

NGSS.HS-PS2-1

A solid metal ball and a hollow plastic ball of the same external radius are released from rest in a large vacuum chamber. When each has fallen 1 m, they both have the same

• inertia

• speed

• momentum energy

• kinetic energy

• change in potential energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A person driving a car suddenly applies the brakes. The 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 (4 s).

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

• No, because the acceleration is needed to use standard equations such as Δx = vot + 1/2 at2.

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

Tags

NGSS.HS-PS2-1

An object is sliding to the right along a straight line on a horizontal surface. The graph shows the object's velocity as a function of time. What is the object's displacement during the time depicted in the graph?

• 0 m

• 1 m

• 8 m

• 16 m

A ball of mass m and momentum p has kinetic energy equal to which of the following?

• (1/2)(p^2/m)

• (p^2/m)

• (2)(p^2/m)

• (2)(m/p^2)

A ball is thrown with an initial speed of 20 m/s at an angle of 60° to the ground. If air resistance is negligible, what is the ball's speed at the instant it reaches its maximum height from the ground?

• Zero

• 10 m/s

• 14 m/s

• 17 m/s

• 20 m/s