Question 1

When both forces on an object are the same size, the forces are ________.

Accepted Answer

balanced

Answer

unbalanced

Question 2

When one force on an object is bigger than the opposite force, the forces are __________.

Accepted Answer

unbalanced

Answer

balanced

Question 3

When forces are unbalanced and one force is greater than the other, we say there is __________.

Accepted Answer

a net force

Answer

no net force

Question 4

When forces are balanced we say there is ___________.

Accepted Answer

no net force

Question 5

There are two forces in the picture: The first one is ________.

Accepted Answer

weight of book

Answer

upward force of arm

Question 6

There are two forces in the picture. The second one is ________.

Accepted Answer

upward force of arm

Answer

weight of book

Question 7

Forces act in pairs.

Accepted Answer

true

Answer

false

Question 8

When you are holding a book, you use an ________ force to hold up the book.

Accepted Answer

upward

Answer

weight

Question 9

The book exerts a downward force, caused by ________ pulling the book downwards.

Accepted Answer

gravity

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