AnswersPhysicsTwo-Dimensional Motion

Two-Dimensional Motion — Test Answers

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What is the direction of the centripetal force when applied to an object?

A
the same direction as the object’s velocity
B
parallel with an object’s motion
C
perpendicular to an object’s motion
D
the direction opposite to the object’s velocity
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Sung rolls a marble off the edge of a table. She rolls the marble off the same table again but at a different speed. Which best describes the projectile motion of the marble as it leaves the table at the two different speeds?

A
The marble’s horizontal and vertical velocities remain the same.
B
The marble’s horizontal velocity changes, but its vertical velocity does not.
C
The marble’s vertical velocity changes, but its horizontal velocity does not.
D
The marble’s horizontal and vertical velocities change.
25

Which statement best compares the vectors?

A
Vector Y has greater magnitude than vector X.
B
Vector X has greater magnitude than vector Y.
C
The vectors have the same displacement.
D
The vectors have the same direction.

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