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Forces Review - Unit 1 Physics

Total questions: 21

Worksheet time: 11mins

Name
Class
Date
1.

If the net force of the diagram below is 50 N upwards, what is the value of B?

a)

0 N

b)

50 N

c)

80 N

d)

100 N

2.

What is the relationship between Gravitational Force and the distance between a planet and its moon?

a)

Direct relationship

b)

Inverse square relationship

c)

They aren't related

d)

They're based on the theory of relativity

3.

A 1300 kg hippopotamus is running at a constant speed of 13 m/s along a perfectly straight riverbank. What is the net force acting on the hippo?

a)

0 N

b)

9.8 N

c)

16900 N

d)

100 N

4.

Which of the following can cause acceleration (change in speed or change in direction)?

a)

Inertia

b)

Velocity

c)

Force

d)

Equilibrium

5.

Which of these two pairs of planets experiences stronger gravitational forces?

a)

A

b)

B

c)

Neither, they have the same amount of force

d)

Not enough info

6.

If the net force of the diagram below is 50 upwards, what is the value of A?

a)

0 N

b)

50 N

c)

80 N

d)

20 N

7.

What is the value of the net force for this FBD?

a)

0 N

b)

23 N

c)

12 N

d)

9 N

8.

A cheetah with an unknown mass is accelerating at a constant rate of 13 m/s2 while traveling in a straight line chasing a gazelle. They produce a force of 871 N while running. What is the mass of the cheetah?

a)

0 kg

b)

67 kg

c)

11323 kg

d)

871 kg

9.

Which variable is measured in newtons?

a)

Mass

b)

Acceleration

c)

Velocity

d)

Force

10.

Which FBD correctly represents a marker flying through the air at a student that Ms. Darveau is trying to wake up? (Assume that she has already let go of the marker, and that there is no air resistance)

a)
b)
c)
d)

None of these

11.

A 224 kg Galapagos tortoise is accelerating at a rate of 0.25 m/s2. What is the net force acting on the tortoise?

a)

0 N

b)

9.8 N

c)

896 N

d)

56 N

12.

Consider the mysterious Planet X and its moon, Moon A. The gravitational force between them is always

a)

Larger for the larger object (the planet)

b)

Larger for the smaller object (the moon)

c)

Equal and opposite

d)

Not enough info

13.

Which statements can describe an object in equilibrium?

a)

The object is at rest

b)

The object is moving at a constant speed (in a constant direction)

c)

The object has a net force of 0 N

d)

All of these can describe equilibrium!

14.

Ms. Darveau kicks her desk and hurts her foot. Which of Newton's laws explain why her foot hurts?

a)

1st law

b)

2nd law

c)

3rd law

d)

4th law

15.

What is the net force on this object?

a)

0 N

b)

35 N

c)

-35 N

d)

50 N

16.

A mantis shrimp can punch with a force of 1500 N, while it only has a mass of 0.09 kg! What is its acceleration?

a)

16,666.67 m/s2

b)

135 m/s2

c)

0 m/s2

d)

8,333.5 m/s2

17.

What is the definition of an object in equilibrium?

(Which statement MUST describe an object in equilibrium?)

a)

An object is at rest

b)

An object is moving at a constant speed (in a constant direction)

c)

An object has zero net force acting on it

d)

All of these

18.

____________ is how difficult it is to cause an object to have acceleration (change speed or direction)

a)

Inertia

b)

Equilibrium

c)

Velocity

d)

Force

19.

What does m/s2 actually mean?

a)

How fast something is traveling

b)

How massive something is due to gravity

c)

How resistant an object is to change in motion

d)

How much something's velocity changes every second

20.

A normal force

a)

Always points up

b)

Always is equal and opposite to gravity

c)

Always is at a 90 degree angle from a surface

d)

Always equals Fg

21.

Which of these does NOT have acceleration?

a)

An asteroid traveling through space at 200,942,123,421 m/s

b)

A car slows down while approaching a red light

c)

The flying pig traveling in a circle in Ms. Darveau's classroom

d)

A football player taking off from the line of scrimmage to run down the field.