AnswersFL-2002040-MJ Comprehensive Science 1 CRUnit Test

Unit Test — Unit test Answers

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Which statement best compares the accelerations of two objects in free fall?

A
The heavier object has a greater acceleration.
B
The object that has the greater surface area has the lower acceleration.
C
The object that has the smaller mass has the greater acceleration.
D
The objects have the same acceleration.
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What is the weight, on Earth, of a book with a mass of 1.5 kg?

A
1.5 N
B
6.5 N
C
11.3 N
D
14.7 N
23

What is the only force that can act on an object in free fall?

A
gravity
B
friction
C
air resistance
D
speed
24

An electroscope is a device that detects charge on objects that touch it or are brought near it. John rubs a piece of cotton fabric on a plastic rod and then touches the rod to the electroscope.

A
John charges the rod through induction, then charges the electroscope through friction.
B
John charges the rod through conduction, then charges the electroscope through induction.
C
John charges the rod through friction, then charges the electroscope through induction.
D
John charges the rod through friction, then charges the electroscope through conduction.
25

A ball is thrown forward at 5 m/s.

A
The ball would follow a curved path on Earth but a straight path on the moon.
B
The ball would follow the same curved path on Earth as on the moon.
C
The ball would curve down more sharply on Earth than on the moon.
D
The ball would curve down on Earth but curve up on the moon.

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