Which of the dot diagrams best describe the motion of a free-falling object that is dropped from rest?

• A

• B

• C

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A paint brush is dropped from the top of a tall ladder and free falls to the ground. What changes, if any, would be observed of the velocity and the acceleration of the brush as it falls? Pick 2 answers.

• The velocity increases.

• The velocity decreases.

• The velocity remains a constant value.

• The acceleration changes (increases or decreases).

• The acceleration remains a constant value.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A tennis ball is hit straight upwards and undergoes a free fall motion as it rises towards its highest point. What changes, if any, would be observed of the velocity and the acceleration of the tennis ball as it rises towards its highest point? Pick two answers.

• The velocity increases.

• The velocity decreases.

• The velocity remains a constant value.

• The acceleration changes (increases or decreases).

• The acceleration remains a constant value.

Tags

NGSS.HS-PS2-1

A baseball is thrown straight upwards from the ground and undergoes a free fall motion as it rises towards its highest point and then fall back downward to the ground. What changes, if any, would be observed of the velocity and the acceleration of the baseball as it falls downward from its highest point? Pick two answers.

• The velocity increases.

• The velocity decreases.

• The velocity remains a constant value.

• The acceleration changes (increases or decreases).

• The acceleration remains a constant value.

Tags

NGSS.HS-PS2-1

Velocity and acceleration are both vectors; they have a direction. What is the direction of the velocity and acceleration vectors of a tennis ball that is rising upward towards its highest point above the ground? Pick two answers.

• The velocity vector is directed upward.

• The velocity vector is directed downward.

• The acceleration vector is directed upward.

• The acceleration vector is directed downward.

Velocity and acceleration are both vectors; they have a direction. What is the direction of the velocity and acceleration vectors of a tennis ball that is falling downward from its highest point towards the ground? Pick two answers.

• The velocity vector is directed upward.

• The velocity vector is directed downward.

• The acceleration vector is directed upward.

• The acceleration vector is directed downward.

A ball is projected upward with an initial speed of approximately 40 m/s. The diagram at the right represents its position at 1-second intervals of time. At what location will the ball have a speed of 0 m/s? Write your answer as a capital letter.

A ball is projected upward with an initial speed of approximately 40 m/s. The diagram at the right represents its position at 1-second intervals of time. At what location will the ball be moving upward with a speed of approximately 30 m/s? Write your answer as a capital letter.

Tags

NGSS.HS-PS2-1

A ball is projected upward with an initial speed of approximately 40 m/s. The diagram at the right represents its position at 1-second intervals of time. At what location will the ball be moving downward with a speed of approximately 10 m/s? Write your answer as a capital letter.

A ball is projected upward with an initial speed of approximately 40 m/s. The diagram at the right represents its position at 1-second intervals of time. At what location will the ball be moving downward with a speed of approximately 20 m/s? Write your answer as a capital letter.