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Pressure, Friction, Gravity, Work

Total questions: 41

Worksheet time: 1hrs 3mins

Name
Class
Date
1.
Two factors effecting the magnitude of the force of gravity between 2 objects are...
a)
Mass and Distance 
b)
Mass and Matter
c)
Distance and Weight 
d)
Weight and Mass
2.
The force of gravity acting on an object is the object's ______.
a)
Mass
b)
Matter
c)
Weight 
d)
Terminal velocity 
3.
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
4.
What is the force acting between any two objects in the known universe all the time?
a)
Gravitational Force 
b)
Force of Friction 
c)
Normal Force 
d)
Electromagnetic Force 
5.
What type of fluid friction acts on an object moving through the air?
a)
Friction 
b)
Normal Force 
c)
Gravity 
d)
Air resistance 
6.
Imagine you travel to another planets. What will change as you walk around the surface of the planet- your mass or your weight?
a)
Mass
b)
Weight 
c)
Both 
d)
Neither 
7.
Friction is a force that acts in a(n) ___________ direction relative to a moving object.
a)
similar
b)
opposite
c)
parallel
d)
perpendicular
8.
How would the absence of friction affect a marble traveling on a long, straight path?
a)
The marble’s speed would decrease.
b)
The marble’s speed would increase.
c)
The marble would stop immediately. 
d)
The marble would remain at a constant speed.
9.
As the distance between 2 objects increases, what happens to gravitational force?
a)
It increases.
b)
It decreases.
c)
It stays the same.
10.
As mass increases, what happens to the gravitational force?
a)
It increases.
b)
It decreases.
c)
It stays the same.
d)
It acts as a 3rd degree derivative function.
11.
What is the rate at which Earth's gravity accelerates objects in free fall?
a)
9.8 m/s2
b)
3.14159 km/hr/s
c)
13.7 m/s2
d)
42 km/h/s
12.

The main reason a baseball comes down when a boy tosses it up into the air is —

a)

magnetism is pulling the ball down

b)

the boy cannot see to catch it

c)

gravity is pulling down on the ball

d)

gravity pushes the ball in the air

13.
What is friction?
a)
It is a resistance force
b)
Friction  does not exist
c)
It is an imaginary force
d)
It is red
14.
How do you lower the friction force?
a)
By a smooth surface
b)
By a rough surface
c)
By not pushing hard
d)
By pushing down
15.

When you increase your depth under water, the water pressure on your body

a)

increases

b)

decreases

c)

stays the same

16.
What decreases as you go up in the atmosphere?
a)
Altitude
b)
Atmosphere
c)
Meteors
d)
Air Pressure
17.

How do you Calculate Pressure

a)

Force(N)/Area(m2)

b)

Force(kg)/Area(mi2)

c)

Area(m2)/Force(N)

18.

Why won't you sink in the snow if you wear snow shoes?

a)

Because the surface area is larger creating less pressure.

b)

Has air in it to keep you floating.

c)

Because the mud won't want you.

19.

Diagram shows the design of a dam. Why does the thickness of the dam increase with its depth?

a)

The design of this structure is stronger.

b)

Water pressure increases with depth.

c)

The cost of construction is lower.

d)

Water pressure acts uniformly in all directions.

20.

What is pressure?

a)

The amount of force exerted on a surface

b)

The surface area of an object

c)

The weight of an object

21.

What is the unit of measurement for pressure? Hint Pa.

a)
pascal
b)
grams
c)
milliters
d)
meters
22.
A fluid can be...
a)
a gas
b)
a liquid
c)
a liquid or a gas
d)
a solid
23.
What form of energy is always present with friction?
a)
Chemical
b)
Light
c)
Electrical
d)
Heat
24.

Which planet has the most gravity?

a)

Earth

b)

Jupiter

c)

The Sun

d)

Saturn

25.

The Earth is closest to the sun during our summer months.

a)

False

b)

True

26.

Pushing a box across the room

a)

Work

b)

No Work

27.

Carrying a baby

a)

Work

b)

No Work

28.

Holding a backpack

a)

Work

b)

No Work

29.

Lifting weights

a)

Work

b)

No Work

30.

Lifting a laundry basket

a)

Work

b)

No Work

31.

Holding a cell phone

a)

Work

b)

No Work

32.

Is this an example of work?

a)

Yes

b)

No!

33.
Which situation is work not done?
a)
lifting a 20 pound box off the floor
b)
holding a 20 pound box above the floor
c)
sliding a 20 pound box across the floor
d)
sliding a 20 pound box up an inclined plane
34.

Two factors that determine work are

a)

force

b)

acceleration

c)

mass

d)

distance

e)

velocity

35.

units for work are, hint J

a)

newtons

b)

joules

c)

meters

d)

seconds

36.

units of force are

a)

newtons

b)

grams

c)

joules

d)

meters

37.

if you push a cart with a force of 60 N for 2 m... how much work have you done

a)

120 J

b)

30 J

c)

120 N

d)

30 N

38.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
39.
What is the formula for work?
a)
Force = work x distance
b)
Distance = force x work
c)
Work = force x distance
d)
Work = force x mass
40.

Fred kicks a ball with a force of 20N to George, who is 5M away. How much work was done to the ball?

a)

25J

b)

100J

c)

4J

d)

75J

41.

If Jay Loppy pushes his van 20 meters how much work is done?

a)

2,000J

b)

40,000J

c)

10,000J

d)

800,000J

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