Kinematics-REVIEW-MIDTERM

Two objects start at x = 0 at time = 0 and move in one dimension independently of one another. Which object is farthest from the origin at t = 2 seconds?

• A

• B

• They are in the same location at t = 2 seconds

• They are the same distance from the origin, but in opposite directions

Two objects that start at x = 0 at t = 0 and move in one dimension independently of one another. Graphs, of the velocity of each object versus time is shown. Which object moves with constant non-zero acceleration?

• A

• B

• both A and B

• neither A nor B

Tags

NGSS.HS-PS2-1

Two objects start at x = 0 at t = 0 and move in one dimension independently of one another. Graphs, of the velocity of each object versus time are shown. Which object is in its initial position at t = 2 seconds?

• A

• B

• both A and B

• neither A nor B

A body moving in the positive x direction passes the origin at time t = 0. Between t = 0 and t = 1 second, the body has a constant speed of 24 meters per second. At t = 1 second, the body is given a constant acceleration of 6 meters per second squared in the negative x direction. The position x of the body at t = 11 seconds is

• +99 m

• +36 m

• - 36 m

• -99 m

Tags

NGSS.HS-PS2-1

A ball is thrown and follows the parabolic path shown above. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the same height above the ground. How do the speeds of the ball at the three points compare?

• Option 1

• Option 2

• Option 3

• Option 4

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Which of the following diagrams best shows the direction of the acceleration of the ball at point P?

• 
• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

The graph below represents position x versus time t for an object being acted on by a constant force. The average speed during the interval between 1 s and 2 s is most nearly

• 2 m/s

• 4 m/s

• 5 m/s

• 6 m/s

A target T lies flat on the ground 3 m from the side of a building that is 10 m tall, as shown above. A student rolls a ball off the horizontal roof of the building in the direction of the target. Air resistance is negligible. The horizontal speed with which the ball must leave the roof if it is to strike the target is most nearly-

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

• A

• B

• C

• D

A student is testing the kinematic equations for uniformly accelerated motion by measuring the time it takes for light-weight plastic balls to fall to the floor from a height of 3 m in the lab. The student predicts the time to fall using g as 9.80 m/s² but finds the measured time to be 35% greater. Which of the following is the most likely cause of the large percent error?

• The acceleration due to gravity is 70% greater than 9.80 m/s2 at this location.

• The acceleration due to gravity is 70% less than 9.80 m/s2 at this location.

• Air resistance increases the downward acceleration.

• The acceleration of the plastic balls is not uniform.