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Unit 4-1

Total questions: 45

Worksheet time: 49mins

Name
Class
Date
1.

Is this an example of a balanced or unbalanced force?

a)

Balanced force

b)

Unbalanced force

c)

I don't know

2.

What is the net force on this object?

a)

80 N West

b)

80 N East

c)

40 N West

d)

40 N East

3.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
4.
If an object is stationary (not moving) the forces acting upon it are _____________
a)
unbalanced
b)
weak
c)
balanced
d)
Hulk Smash!
5.
The force that pulls things toward earth.
a)
Speed
b)
Gravity
6.

What two things determine the gravity of an object?

a)

mass & weight

b)

mass & distance

c)

density & mass

d)

volume & distance

7.

A brick and a pencil are dropped at the same time from the same height. Which one would hit the ground first?

a)

brick

b)

pencil

c)

both would hit at the same time

8.

When will the forces of gravity between two objects be the GREATEST?

a)

when the masses of both objects are small and the objects are far apart

b)

when the masses of both objects are large and the objects are close together

c)

when the masses of both objects are small and the objects are close together

d)

when the masses of both objects are large and the objects are far apart

9.

When you drop a hammer and a feather, why does the feather fall slower?

a)

air resistance causes the feather to slow down

b)

gravity pulls harder on the hammer than the feather

c)

gravity pulls harder on the feather than the hammer

d)

air resistance causes the hammer to fall slower

10.
What is the SI unit used to measure force? 
a)
pounds 
b)
grams 
c)
newtons 
d)
kg/ m2
11.
Which of the following will not change in different gravitational fields?
a)
weight
b)
force
c)
mass
d)
pounds
12.
The amount of matter in an object.
a)
force 
b)
mass
c)
weight 
d)
pressure 
13.
A person would weigh less on the moon than on the Earth because...
a)
the moon has less mass, and therefore less gravity
b)
the moon has more mass, and therefore less gravity
c)
the moon has less mass, and therefore more gravity
d)
the moon has more mass, and therefor more gravity
14.
Wheels on a skateboard most likely experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
15.
Sally experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
16.
Swimming fish experience-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
17.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
18.
The rougher the surface, the faster an object will travel over the surface.
a)
True
b)
False
19.
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
20.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
21.
What is speed?
a)
how much an object’s position changes
b)
how far an object moves
c)
how long an object moves
d)
how far an object moves in a certain amount of time
22.
What is the speed of a runner who runs 400 meters in 40 seconds? (speed = distance ÷ time)
a)
10 meters/second
b)
40 meters/second
c)
100 meters/second
d)
1,600 meters/second
23.
What is a force?
a)
a push or pull
b)
speed or acceleration 
c)
potential or kinetic energy
d)
balanced or unbalanced force
24.
which describes how fast something is moving?
a)
force
b)
speed
c)
position
d)
slide
25.
Why does a rolling ball stop?
a)
Gravity
b)
Friction
c)
Waterfalls
d)
Sand
26.
Acceleration: is the rate of change in ___________.
a)
speed
b)
distance
c)
velocity 
d)
displacement 
27.
A car accelerates from a standstill to 70 m/s in 10 seconds.  What is the acceleration?
a)
0.7m/s2
b)
7m/s2
c)
14m/s2
d)
none of the above
28.
The SI unit for acceleration is
a)
mph
b)
ft/sec2
c)
m/s2
29.
When are you undergoing an acceleration in a car? 
a)
speed up
b)
slow down
c)
make turns
d)
All of the above 
30.

The picture of the position vs. time graph shows an object that is...

a)

speeding up

b)

moving at a constant speed

c)

not moving

d)

slowing down.

31.
Which graph shows the object standing still?
a)
A
b)
B
c)
C
d)
D
32.
Which graph demonstrates the greatest positive speed?
a)
A
b)
B
c)
C
d)
D
33.

Which graph represents the greatest acceleration?

a)

A

b)

B

c)

C

d)

D

34.

What evidence can be observed to tell if an object is in motion?

a)

change in position relative to another moving object

b)

change in position relative to a non moving object

c)

change in position relative to time

d)

change in speed

35.

A battery-powered cart pulls an 800-gram load across the floor. If the load were reduced to 400 grams, and the force used to move the cart remained the same, the cart would

a)

move slower

b)

move faster

c)

move at the same speed

d)

stop moving

36.

Which of theses would cause a change in acceleration? (Select all that apply)

a)

speeding up

b)

standing still

c)

constant velocity

d)

changing direction

e)

balanced forces

37.

All matter has mass,

a)

but small amounts of mass are unaffected by gravity.

b)

and all mass is affected by gravity.

c)

but only the Earth's gravity affects matter.

d)

but only Earth's and the Sun's gravity affects matter.

38.

Which of the following does not describe weight?

a)

changes as gravitational force changes

b)

is always constant

c)

is a measure of gravitational force

d)

can be measured in Newtons (as a force)

39.

If a student has a weight of 420N on Earth, what is the students weight on the moon? (Moons gravity is 1/6 of Earth's gravity)

a)

70kg

b)

2520kg

c)

70N

d)

2520N

40.

What is the difference between velocity and speed?

a)

velocity includes time

b)

speed includes direction

c)

velocity includes direction

d)

speed includes time

41.

A clock with moving hands is constantly accelerating.

a)

true

b)

false

42.

What is the gravitational acceleration on Earth?

a)

0 m/s2

b)

9.8 m/s2

c)

ON

d)

9.8N

43.

When the force of gravity and air resistance are equal it is called

a)

projectile motion

b)

terminal velocity

c)

free fall

d)

constant acceleration

44.

When the force only force acting on an object is gravity

a)

projectile motion

b)

terminal velocity

c)

free fall

d)

constant acceleration

45.

Which of the following affects air resistance? Select all that apply

a)

speed

b)

weight

c)

size

d)

shape

e)

mass

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