Acceleration

Which of the following does a speedometer on a vehicle measure?

• instantaneous speed

• instantaneous velocity

• average speed

• average velocity

You are given the vx-t graph for an object moving along the x-axis with constant acceleration. Which of the following could you not determine from the information given in this graph alone?

• the object’s x-acceleration at any time t

• the object’s x-velocity at any time t

• the object’s position at any time t

• more than one of the above

• misleading question—you could determine all of these from the vx-t graph alone

This is the x-tgraph of the motion of a particle. Of the four points P, Q, R,and S, the velocity is greatest (most positive) at

• P

• Q

• R

• S

This is the x-tgraph of the motion of a particle. Of the four points P, Q, R,and S, the speed is greatest at

• P

• Q

• R

• S

This is the x-tgraph of the motion of a particle. Of the four points P, Q, R,and S, the acceleration is greatest (most positive) at

• P

• Q

• R

• S

Tags

NGSS.HS-PS2-1

You toss a ball straight upward, in the positive direction. The ball falls freely under the influence of gravity.

At the highest point in the ball’s motion,

• its velocity is zero and its acceleration is zero.

• its velocity is zero and its acceleration is positive (upward).

• its velocity is zero and its acceleration is negative (downward).

• its velocity is positive (upward) and its acceleration is zero.

• its velocity is positive (upward) and its acceleration is zero.

This is a motion diagram of an object moving along the x-direction with constant acceleration. The dots 1, 2, 3, … show the position of the object at equal time intervals ∆t.At the time labeled 3, what are the signs of the object’s velocity v and acceleration a?

• v< 0, a= 0

• v< 0, a< 0

• v> 0, a< 0

• v< 0, a> 0

Tags

NGSS.HS-PS2-1

This is a motion diagram of an object moving along the x-direction with constant acceleration. The dots 1, 2, 3, … show the position of the object at equal time intervals ∆t. Which of the following vx-tgraphs best matches the motion shown in the motion diagram? (x just means in the x plane - horizontal)

• 
• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

This is a motion diagram of an object moving along the x-direction with constant acceleration. The dots 1, 2, 3, … show the position of the object at equal time intervals ∆t. Which of the following ax–tgraphs best matches the motion shown in the motion diagram? (the x means the x-plane or horizontal plane)

• 
• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

An object moves along the x-axis (horizontal plane) with constant acceleration. The initial position x is positive, the initial velocity is negative, and the acceleration is positive.

Which of the following vx-t graphs best describes this motion?

• 
• 
• 
• 
• 

Tags

NGSS.HS-PS2-1