Question 1

What is the reaction force for a book that exerts 20 N on a table?

Accepted Answer

20 N up from the table

Answer

10 N down from the book

Answer

10 N up from the book

Answer

There is no reaction force, the book is just sitting there!

Question 2

Two teams play tug of war. The Green Team pulls with 210 N of force and the Blue Team pulls with 185 N of force. What is the net force?

Accepted Answer

25 N toward the green team

Answer

395 N toward the blue team

Answer

395 N toward the green team

Answer

25 N toward the blue team

Question 3

Find the acceleration of an arrow that had 78 N applied to it and has a mass of 0.5 kg.

Accepted Answer

156 m/s/s

Answer

156 N

Answer

39 m/s/s

Answer

39 N

Question 4

A student lets go of a balloon. What is the reaction force?

Accepted Answer

The balloon moves forward

Answer

The balloon shrinks

Answer

The air moves out of the balloon

Answer

the balloon expands

Question 5

Which situations would have action-reaction pairs of forces?

Accepted Answer

all of them

Answer

a batter hitting a baseball

Answer

a worker shoveling dirt

Answer

a cat sleeping on a chair

Question 6

Which has the greatest momentum when moving, assuming all have the same velocity?

Accepted Answer

elephant

Answer

rabbit

Answer

wolf

Answer

horse

Question 7

Find the mass of a rock that exerts 13 N of force with an acceleration due to gravity of 9.8 m/s/s.

Accepted Answer

1.33 kg

Answer

127.4 N

Answer

1.33 N

Answer

127.4 kg

Question 8

What is the momentum of a cat with a mass of 12 kg and a velocity of 4.5 m/s?

Accepted Answer

54 kg x m/s

Answer

2.67 m/s/s

Answer

2.67 kg x m/s

Answer

54 m/s/s

Question 9

Which is the correct unit of measurement for momentum?

Accepted Answer

kg x m/s

Answer

m/s/s

Answer

m/s

Answer

N

Question 10

What is the moving object doing between points C and D on this distance-time graph?

Accepted Answer

speeding up

Answer

slowing down

Answer

not moving

Answer

constant speed

Question 11

What is the moving object doing between points E and F?

Accepted Answer

moving back to the point of origin at a constant speed

Answer

not moving

Answer

going downhill at a constant speed

Answer

slowing down

Question 12

The speed at point B is:

Accepted Answer

2 m/s

Answer

40 m/s

Answer

0.5 m/s

Answer

20 m/s

Question 13

What does the moving object do between the origin and point A on this speed-time graph?

Accepted Answer

speed up

Answer

slowing down

Answer

constant speed

Answer

doesn't move

Question 14

Which line segment shows negative acceleration?

Accepted Answer

B to C

Answer

A to B

Answer

E to F

Answer

C to D

Question 15

How is velocity different from speed?

Accepted Answer

It includes direction

Answer

There is no difference

Answer

It can show if something speeds up

Answer

It can show if something slows down

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