AnswersPhysicsTwo-Dimensional Motion and Gravity

Two-Dimensional Motion and Gravity — Test Answers

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21
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The seasons of the year result from Earth’s movement, or [Dropdown 1] ​​​​​​​, around the Sun.

Answer:

revolution

22
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How does a centripetal force cause circular motion?

A
It acts in the direction of the object’s motion and causes the object to constantly change direction.
B
It acts at a right angle to the object’s motion and causes the object to constantly change speed.
C
It acts at a right angle to the object’s motion and causes the object to constantly change direction.
D
It acts in the direction of the object’s motion and causes the object to constantly change speed.
23

The gravitational force between two objects is 2400 N. What will be the gravitational force between the objects if the mass of one object is doubled?

A
4800 N
B
600 N
C
9600 N
D
1200 N
24

Jin walked 4 kilometers on a straight path to get to the sandwich shop. He traveled 30 degrees south of east. What is the southern component of Jin’s displacement, rounded to the nearest tenth?

A
3 point 5 kilometers
B
negative 3 point 5 kilometers
C
negative 2 kilometers
D
2 kilometers
25

Two objects have the same center point of the circle, but are located at different positions away from the center point. Each object is moving with uniform circular motion. Which would describe the tangential speed of the objects?

A
the object with the larger radius has a faster tangential speed
B
both objects would have the same tangential speed
C
both objects would have oscillating tangential speeds
D
the object with the smaller radius has a faster tangential speed

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