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Forces

Total questions: 36

Worksheet time: 26mins

Name
Class
Date
1.
According to Newton's First Law, an object at rest will tend to do which of the following?
a)
stay at rest
b)
stay in motion
c)
speed up
d)
change in direction
2.
According to Newton's First Law, an object in motion will tend to:
a)
stay at rest
b)
stay in motion
c)
change in direction
d)
slow down
3.
Which of the following could cause an acceleration?
a)
A balance between two forces
b)
A balance between three forces
c)
An imbalance between two forces
d)
Zero forces
4.
Multiplying the mass and acceleration of an object would give you:
a)
the force of gravity
b)
the force of friction
c)
the velocity
d)
the net force
5.
Which of the following is always true?
a)
Fnet = ma
b)
Fnet = m + a
c)
Fnet = m - a
d)
Fnet = m/a
6.
Fill in the blanks: _____ does not change from place to place, but _____ can change because of differences in the strength of gravitational pull.
a)
acceleration, weight
b)
weight, acceleration
c)
mass, weight
d)
weight, mass
7.
An unbalanced force causes:
a)
change in mass
b)
acceleration
c)
balanced forces
d)
change in time
8.
______ forces affect the motion of an object by speeding it up, slowing it down, or changing the direction of it.
a)
Balanced
b)
Strong
c)
Unbalanced
d)
WeaK
9.
As the force applied to an object increases, its acceleration______
a)
decreases
b)
increases
c)
stays the same
d)
does not exist
10.
The combination of all forces acting on an object is called __________
a)
Parallelogram Rule
b)
Net Force
c)
Vector Quantity
d)
All the Jedi's using their abilities together
11.

Your car has a mass of 2500 kg and a force of 5000 N. How fast will it accelerate?

a)

20 m/s2

b)

0.5 m/s2

c)

2 m/s2

d)

120 N

12.
A 20 kg bike accelerates at 10 m/s2.  what was the force?
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
13.

If an object was accelerating at 5 m/s2, and a force of 10 newtons was required to accelerate it, what was the object's mass?

a)

50 kg

b)

2 kg

c)

0.5 kg

d)

5 kg

14.
What is a frame of reference?
a)
Something that is assumed to be in motion (moving)
b)
Something that is assumed to be stationary (not moving)
15.
Define Inertia
a)
The amount of matter in an object
b)
Pull of gravity on an object
c)
A push or a pull
d)
An objects tendency to resist change in motion
16.
A net force of 15 N is exerted on an encyclopedia to cause it to accelerate at a rate of 5 m/s2. Determine the mass of the encyclopedia?
a)
 m = 3.0 kg
b)
m = 4.0 kg 
c)
m = 3.0 ml 
d)
m = 30.0 g
17.
If a 10 kilogram object accelerates suddenly at 15 m/s2, how much force was applied to the object?
a)
150 Newtons
b)
15 Newtons
c)
150 kilograms
d)
100 kilograms
18.

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration? (F=ma)

a)

The one with a mass of 0.78 kg will have the greatest acceleration.

b)

The one with a mass of 0.52 kg will have the greatest acceleration.

c)

They will both accelerate at the same rate.

19.
Unit of mass
a)
m/s 2
b)
m/s
c)
newtons
d)
kg
20.
What can a force do?
a)
all of the above
b)
start a motion
c)
stop a motion
d)
change the direction of the motion
21.

What is the acceleration of a 50 kg object pushed with a force of 500 newtons? To solve this problem you must do -

a)

500 ÷ 50

b)

50 ÷ 500

c)

500 x 50

22.

If an object is stationary (not moving) the forces acting upon it are _____________

a)

unbalanced

b)

weak

c)

balanced

d)

non existent

23.
You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.
a)
20N 
b)
40N 
c)
10N 
d)
70N
24.

What is the unit of force?

a)

Newton, N

b)

Centimetre, cm

c)

Kilometre, km

d)

kilogram, kg

25.
The type of force that opposes motion is called:
a)
magnetism
b)
friction
c)
gravity
d)
electric/static
26.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 n right
d)
50 N left
27.

Which shows an example of unbalanced forces?

a)
b)
c)
d)
28.

Friction _____________ motion

a)

Works in the same direction as

b)

Opposes

c)

Has not effect on

d)

Pulls against

29.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)
All are examples that are helpful
30.
If there are two forces going in the same direction how would you find the net force?
a)
Subtract
b)
Add
c)
Neither
d)
Multiply
31.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
32.
  A type of friction that occurs when a round object rolls across a flat floor. 
a)
static
b)
rolling
c)
sliding
33.
A force that opposes motion of an object through a fluid is called: 
a)
static friction
b)
rolling friction
c)
fluid friction 
34.
The constant velocity of a falling object when the force of air resistance equals the force of gravity is called: 
a)
terminal velocity
b)
projectile motion
c)
sliding friction
35.
A child pulls on a toy with a force of 25 N to the right. Another child pulls the toy with 15 N to the left. The net force is:
a)
1.7 N to the right
b)
1.7 N to the left
c)
10 N to the right
d)
10 N to the left
36.
A box is pushed left with 35 N and right with 40 N of force. The box has a mass of 5 kg. What is the acceleration?
a)
5 m/s2
b)
1 m/s2
c)
25 m/s2
d)
8 m/s2

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