Grade 9 Science Practice Worksheet: Forces

Forces Practice Worksheet

Grade 9 Science Forces Practice Worksheet Easy 30 Questions 8 Views

Classroom Worksheet

Grade 9 Science Practice Worksheet: Forces

Forces Practice Worksheet

Name____________________________

Date________________

Score______ / 30

Grade: Grade 9

Subject: Science

Topic: Forces

Time: 20 Minutes

Difficulty: Easy

Questions: 30

Instructions:
Name: ____________________ Date: ____________________ Directions: Answer each question about forces. Start with the easier questions and build to the more challenging ones. Write your answers clearly and show your thinking where needed.

Skills Practiced:

Forces
Science
Critical Thinking
Problem Solving

1Question

What is a force?

2Question

Is gravity a force?

3Question

What force pulls objects toward Earth?

4Question

What do we call the force that slows moving objects down?

5Question

What force is used when you open a door by pushing it?

6Question

What force is used when you pull a drawer open?

7Question

Name one unit used to measure force.

8Question

Which is usually larger: mass or weight?

9Question

What happens to an object if the forces on it are balanced?

10Question

What happens to an object if the forces on it are unbalanced?

11Question

A book rests on a desk. What force keeps it from falling through the desk?

12Question

What force opposes motion between two surfaces touching each other?

13Question

Why do shoes have tread or patterns on the bottom?

14Question

What force causes a ball thrown upward to come back down?

15Question

If you push a cart harder, what usually happens to its motion?

16Question

What is acceleration?

17Question

A soccer ball is moving across grass and slows down. What force is mainly causing this?

18Question

What is air resistance?

19Question

Why does a feather fall more slowly than a rock in air?

20Question

What is the net force if 5 N acts to the right and 5 N acts to the left?

21Question

What is the net force if 8 N acts to the right and 3 N acts to the left?

22Question

What is the net force if 10 N pulls up and 4 N pulls down?

23Question

A student pushes a box, but the box does not move. What can you say about the forces?

24Question

What is an example of a force that acts without touching an object?

25Question

Why does a bicycle eventually slow down when you stop pedaling?

26Question

If the net force on an object is zero, what happens to its velocity?

27Question

A toy car moves east with 6 N of force and west with 2 N of force. What is the net force and direction?

28Question

A sled is pulled forward with 12 N and friction pulls backward with 7 N. What is the net force?

29Question

Explain why seat belts are important when a car stops suddenly.

30Question

Describe how balanced and unbalanced forces are different.

Answer Key

#	Answer
1	A push or a pull.
2	Yes, gravity is a force.
3	Gravity.
4	Friction.
5	A push force.
6	A pull force.
7	Newton (N).
8	Mass and weight are different; weight is the force of gravity on mass.
9	It stays at rest or keeps moving at the same speed in a straight line.
10	Its motion changes; it may speed up, slow down, or change direction.
11	The support force from the desk (normal force).
12	Friction.
13	To increase friction and prevent slipping.
14	Gravity.
15	It accelerates more, so it moves faster or changes motion more.
16	A change in velocity, including speed or direction.
17	Friction with the grass and air resistance.
18	A force from air that opposes motion through it.
19	Air resistance affects the feather more.
20	0 N.
21	5 N to the right.
22	6 N up.
23	The forces are balanced.
24	Gravity.
25	Friction and air resistance slow it down.
26	It stays the same.
27	4 N east.
28	5 N forward.
29	They help keep passengers moving safely with the car and reduce the effect of inertia.
30	Balanced forces are equal and opposite, so motion does not change. Unbalanced forces are not equal, so they change an object's motion.