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CH 5 FORCES REVIEW

Total questions: 52

Worksheet time: 1hrs 3mins

Name
Class
Date
1.

A kilogram is a unit of _____.

a)

mass

b)

force

c)

weight

2.

A Newton is a unit of _____.

a)

mass

b)

force

3.

A pound is a unit of _____.

a)

mass

b)

force

4.

The SI Unit of force is a(n) _____.

a)

pound

b)

kg

c)

Newton

d)

Joule

5.

1 kg = _____ lbs

a)

2.2

b)

4.448

c)

9.8

d)

8.9

6.

1 lb = _____ N

a)

2.2

b)

4.448

c)

9.8

d)

8.9

7.

The amount of force needed to cause a mass of 1kg to accelerate by 1 m/s/s is a(n) _____.

a)

Newton

b)

gravity

c)

speed

d)

acceleration

8.

An attractive force between any 2 objects is called _____.

a)

kilograms

b)

Pounds

c)

Newtons

d)

gravity

9.

Gravity depends on _____.

a)

mass and distance

b)

mass and speed

c)

speed and distance

d)

speed and acceleration

10.

Which statement about gravity is correct?

a)

mass increase, gravity increases

b)

distance increases, gravity increases

c)

mass decreases, gravity increases

d)

gravity does not depend on mass and distance

11.

A force that comes from Earth's gravity is called _____.

a)

weight

b)

kilograms

c)

mass

d)

matter

12.

A force that changes with changes in gravity is called _____.

a)

weight

b)

kilograms

c)

mass

d)

matter

13.

A measure that does not change with changes in gravity is called _____.

a)

weight

b)

Newtons

c)

mass

d)

pounds

14.

A measure that changes with changes in gravity is called _____.

a)

weight

b)

kilograms

c)

mass

d)

matter

15.

Weight depends on _____.

a)

mass and distance

b)

mass and gravity

c)

gravity and distance

d)

mass and matter

16.

When the only force acting on an object is gravity and the air resistance is negligible, a falling object is said to be in _____.

a)

free fall

b)

terminal velocity

c)

trouble

d)

equlibrium

17.

An object in free fall accelerates due to the force of _____.

a)

gravity

b)

weight

c)

mass

d)

speed

18.

Objects in free fall undergo _____ acceleration.

a)

constant

b)

increasing

c)

decreasing

d)

none

19.

Objects in free fall undergo _____ speed.

a)

constant

b)

increasing

c)

decreasing

d)

none

20.

Objects that have reached terminal velocity undergo _____ speed.

a)

constant

b)

increasing

c)

decreasing

d)

none

21.

Objects that have reached terminal velocity are in _____ acceleration.

a)

constant

b)

increasing

c)

decreasing

d)

no

22.

When the upward force of air resistance equals the downward force of gravity an object has reached _____.

a)

terminal velocity

b)

free fall

c)

increasing speed

d)

increasing acceleration

23.

The highest speed a falling object will reach is called _____.

a)

terminal velocity

b)

free fall

c)

increasing speed

d)

increasing acceleration

24.

A force that resists the motion of objects or surfaces is called _____.

a)

friction

b)

speed

c)

acceleration

d)

mass

25.

Friction is measured in _____.

a)

Newtons

b)

pounds

c)

mass

d)

matter

26.

A frictional force that occurs when one surface slides past another surface is called _____ friction

a)

static

b)

rolling

c)

sliding

d)

non

27.

A frictional force that occurs when one surface rolls past another surface is called _____ friction

a)

static

b)

rolling

c)

sliding

d)

non

28.

A frictional force that occurs between 2 non-moving surfaces is called _____ friction

a)

static

b)

rolling

c)

sliding

d)

non

29.

If mass stays the same and friction increases, speed _____.

a)

increases

b)

decreases

c)

doesn't change

30.

If mass stays the same and friction increases, the force needed to move the object _____.

a)

increases

b)

decreases

c)

doesn't change

31.

When all forces acting on an object are equal, the forces are _____.

a)

balanced

b)

unbalanced

c)

unequal

d)

different

32.

A friction-like force that opposes the motion of objects in the air is called _____.

a)

static

b)

rolling

c)

sliding

d)

air resistance

33.

When all forces acting on an object are not equal, the forces are _____.

a)

balanced

b)

unbalanced

c)

equal

d)

similar

34.

When calculating _____ force, all forces must be taken into account.

a)

net

b)

normal

c)

equilibrium

d)

Star Wars

35.

If the forces acting on an object are balanced, the object is in _____.

a)

equilibrium

b)

an unbalanced state

c)

unequalness

d)

free fall

36.

If the forces acting on an object are balanced, the net force is _____.

a)

0

b)

greater than 0

c)

less than zero

37.

If the forces acting on an object are unbalanced, the net force is _____.

a)

0

b)

greater than 0

c)

less than zero

38.

If the forces acting on an object are balanced, the motion of the object _____.

a)

will change

b)

will not change

39.

If the forces acting on an object are unbalanced, the motion of the object _____.

a)

will change

b)

will not change

40.

The upward force created when an object is in contact with a surface is _____ force.

a)

net

b)

normal

c)

increasing

d)

unbalanced

41.

If an object on a table has a weight of 50 N, the normal force is _____.

a)

0

b)

50 N

c)

9.8 N

d)

5.1 N

42.

Calculate the net force,

a)

50 N right

b)

50 N left

c)

140 N right

d)

90 N left

43.

The forces in the picture are ____.

a)

unbalanced

b)

balanced

c)

in equilibrium

d)

the same

44.

Calculate the net force.

a)

70 N right

b)

70 N left

c)

0 N

d)

140 N

45.

The forces in the diagram are _____.

a)

balanced

b)

unbalanced

c)

different

d)

unequal

46.

How much does a 105 lb box weigh in kg?

a)

about 1029 kg

b)

about 231 kg

c)

about 48 kg

d)

about 11 kg

47.

How much does a 88 kg box weigh in lbs?

a)

about 194 lbs

b)

about 40 lbs

c)

about 862 lbs

d)

about 9 lbs

48.

How much does a 60 kg box weigh in Newtons on Earth?

a)

about 28 N

b)

about 132 N

c)

about 588 N

d)

about 6 N

49.

How much does a 108 lb box weigh in Newtons on Earth?

a)

about 480 N

b)

about 1058 N

c)

about 11 N

d)

about 24 N

50.

An object is in free fall for 8.2 seconds. How far will it fall?

a)

about 329 m

b)

about 3224 m

c)

about 659 m

d)

about 40 m

51.

An object is in on a cliff that is 1350 meters high. How long will it fall?

a)

about 16 s

b)

about 275 s

c)

about 11 s

d)

about 5 s

52.

A motorcycle, with a weight of 2700 Newtons is traveling down the road. The engine provides 5500 Newtons of force. There is 500 Newtons of friction and 200 Newtons of air resistance. Calculate the net force acting on the motorcycle?

a)

4800 Newtons forward

b)

8900 Newtons forward

c)

2200 Newtons up

5000 Newtons forward

d)

2700 Newtons down, 4800 Newtons forward