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Worksheets

Gr9 & 10-P3&P4

Total questions: 50

Worksheet time: 1hrs 16mins

Name
Class
Date
1.
What is the moment acting on the seesaw?
a)
1.6Nm
b)
15Nm
c)
16N
d)
4Nm
2.
The easiest way to open a heavy door  is by applying the force
a)
Near the hinges
b)
In the middle of the door
c)
At the edge of the door far from the hinges
d)
At the top of the door
3.
A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?
a)
7.5 Nm
b)
1.5 Nm
c)
750 Nm
d)
150 Nm
4.

Assuming the system is in equilibrium, calculate the missing distance d

a)

3.4 m

b)

2.8 m

c)

4.4 m

d)

1.6 m

5.

A nut can be loosened more easily with

a)

a short spanner because a larger turning effect can be produced.

b)

a long spanner because a larger turning effect can be produced.

c)

a long spanner because a larger force can be produced.

d)

a short spanner because a larger force can be produced.

6.

A boy of weight 600N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw?

a)

450 N

b)

350 N

c)

4.5 N

d)

200 N

7.

A moment is...

a)

a force measured in Newtons

b)

a turning force measured in newton metres

c)

a distance measured in metres

d)

a time intervals measured in clicks

8.

Moment (Nm) =

a)

Force (N) x distance (m)

b)

Angular Force (N°) x distance (m)

c)

Work done (J)

d)

Force (N) x distance (s)

9.
Unit of force.
a)
Meter
b)
Centimeter
c)
Newton
10.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
11.
Determine the momentum of 1000-kg car moving northward at 20 m/s......... 
a)
20000 N
b)
20000 Joules
c)
20000 Kg * m/s
d)
20000 kg * m/s north
12.
The definition of momentum is
a)
Mass in Motion
b)
The size of an object
c)
The velocity of an object
d)
A comparison between two objects
13.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
14.
A runner has a momentum of 720 kg m/s and is traveling at a velocity of 5 m/s. What is his mass?
a)
14.4 kg
b)
1400 kg
c)
144 kg
d)
360 kg
15.

If an object with a mass of 10 Kg is traveling at 30 m/s, what is it's momentum?

a)

3 kg *m/s

b)

3 N

c)

300 kg *m/s

d)

300 N

16.

If two shopping carts are traveling at the same speed, but one is full and one is empty, which will have more momentum?

a)

The empty one

b)

The full one

c)

Neither

17.

What impulse occurs when an average force of 10 N is exerted on an object for 2 s?

a)

20 N*s

b)

20 N/s

c)

5 N*s

d)

5 N/s

18.

A ball traveling at 2 m/s collides with another ball at rest and bounces off of it. What type of collision is it?

a)

Elastic

b)

Inelastic

c)

Normal

19.

The conservation of momentum means...

a)

The momentum before an event disappears after the event

b)

The momentum before and after an event are equal

c)

The momentum before an event increases after the event

d)

The momentum before and after an event changes

20.

_________________ causes and is equal to a change in momentum

a)

Impulse

b)

Force

c)

Joule

d)

Watt

21.

can a bullet have the same momentum as a truck?

a)

yes

b)

no

22.

Check ALL that apply.

Impulse is:

a)

The force that creates an acceleration.

b)

The change in momentum.

c)

the change in velocity that can be caused by a constant force over some discrete amount of time.

d)

A vector

e)

NOT a vector

23.
What is 'drag' another name for?
a)
dressing up
b)
air resistance
c)
friction
d)
weight
24.
What is the force that pulls us towards the Earth?
a)
gravity
b)
weight
c)
friction
d)
mass
25.
Name two quantities that are vectors.
a)
force and speed
b)
speed and acceleration
c)
force and acceleration
d)
mass and weight
26.
What word describes both the speed and direction of movement of an object?
a)
speed
b)
acceleration
c)
displacement
d)
velocity
27.
What is the name for a single force on an object with the same effect as all the forces combined?
a)
big
b)
total
c)
resultant
d)
sum
28.
Two forces on an object are in opposite directions. How do we calculate the resultant force?
a)
divide one by the other
b)
multiply them
c)
find the difference between them
d)
add them together
29.
Is the car
a)
Stationary
b)
Moving at constant speed
c)
Accelerating
d)
Decelerating
30.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
31.
The force that opposes the motion of two surfaces sliding past each other is called ___________.
a)
acceleration
b)
inertia
c)
friction
d)
unbalanced
32.
What is it called when the force of gravity is acting on an object?
a)
Weight
b)
Sliding Friction
c)
Momentum
d)
Projectile Motion
33.
A ____________ is a push or a pull on an object.
a)
chemical
b)
force
c)
magnet
d)
gravity
34.
___________ is the amount of matter in an object.
a)
mass
b)
weight
c)
volume
d)
force
35.

What are balanced forces?

a)

Forces of the same size, in opposite directions

b)

Forces of the same size, in the same direction

36.

What is the resultant force?

a)

40 N left

b)

0 N Balalnced

c)

400 N right

d)

40 N right

37.
How will this object move? 
a)
It won't move. 
b)
It will move to the right. 
c)
It will move to the left. 
d)
It will move in both directions. 
38.

What is the resultant/ net force?

a)

30 N left

b)

25 N right

c)

5 N left

d)

55 N right

39.

What is the resultant/ net force?

a)

400 N Up

b)

400 N Down

c)

- 400 N Down

d)

800 N Down

40.
Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?
a)
Balanced
b)
Unbalanced
41.
Are forces balanced or unbalanced when skateboarding down a ramp?
a)
Balanced
b)
Unbalanced
42.

Which property of an object cannot be changed by a force?

a)

mass

b)

motion

c)

shape

d)

size

43.

The diagram shows the speed-time graph for a car.

Which area represents the distance travelled while the car is accelerating?

a)

X

b)

X + Y

c)

Y

d)

Y - X

44.

A wooden bar is pivoted at its centre so that it can rotate freely. Two equal forces F are applied to the bar.

In which diagram is the turning effect greatest?

a)
b)
c)
d)
45.

A hole is drilled in a square tile. The diagram shows the tile hanging freely on a nail.

Where is the centre of mass of the tile?

a)

A

b)

B

c)

C

d)

D

46.
Link between force, mass and acceleration
a)
force = mass x acceleration
b)
force = acceleration / mass
c)
force = mass / acceleration
d)
force = mass x force
e)
force = acceleration / force
47.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

48.

Which side of a right triangle has the longest length?

a)

Leg 1

b)

Leg 2

c)

Hypotenuse

d)

Right Angle

49.

Which is the formula used for the Pythagorean Theorem?

a)

a2+b2+c2

b)

a+b=c

c)

a2+c2=b2

d)

a2+b2=c2

50.

Calculate

a)

5

b)

4.5

c)

8

d)

10

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