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WorksheetsKS3 Science (Forces) - Y9 Exam
Total questions: 45
Worksheet time: 45mins
Which of these is NOT a force?
Friction
Normal
Weight
Electrical resistance
What is the name of the units that we measure force in?
Einsteins
Newtons
Kilograms
Metres
State Newtons First Law
the rate change of momentum
the rate change of velocity
an object will remain at rest or move along a straight line with constant speed, unless it is acted upon by a force
If the net force is equal to zero, the forces acting on the object are
balanced
unbalanced
The unit of force is
ms-1
ms-2
Newton
kg
Which object will most likely move farthest with only 3 newtons of force?
a paper clip
a computer
your science book
a tissue box
Which of the following would most likely stop the motion of an airplane?
electricity
friction
heat
magnetism
A softball is tossed outside a window. Which force will act on the ball's motion as the ball flies and then hits the ground?
gravity
friction
magnetism
___________ is a measure of the amount of matter in an object.
gravity
force
mass
What force causes a compass needle to move?
friction
unbalanced force
magnetism
gravity
Use the picture as reference. If the force of the girl pushing is 30N, and the force of the boy who is also pushing is 30N, what is the net force?
0N
60N
900N
1N
Use the picture as reference. If the force of the girl pushing is 20N, and the boy who is also pushing is 15N, what is the net force?
5N
300N
35N
1.33N
If you apply an unbalanced force to an object at rest, what will happen to that object?
the object will remain at rest.
the object will move.
The object will stay.
None of the above.
If all forces acting on an object have equal magnitudes, what is the state of that object?
the object is at rest.
the object is moving.
The object is accelerating.
None of the above.
What operation do we use when forces acting on an object have the same direction?
division
multiplication
subtraction
addition
What operation do we use when forces acting on an object have the opposite directions?
division
multiplication
subtraction
addition
Streamlining is all about trying to produce a shape that produces the smallest amount of resistance
False
True
How does streamlining affect speed?
more streamlining decreases speed
more streamlining increases speed
The streamlining on this vehicle is all about ... (2 reasons)
reducing the air resistance
Increasing the air resistance
decreasing fuel consumption
increasing fuel consumption
making the truck look good
Friction can be reduced by:
providing wheels
lubricating
streamlining
All of these
Which of the following help to increase friction:
oiling of machine parts
streamlining the ships
spikes in shoes
polishing the surface
Which of the following is contact force
magnetic force
electrostatic force
gravitational force
none of these
The moment of a force causes an object to
move forward
move backward
stop moving
turn about a fixed point
The turning effect of a force on a door is greater when it is applied at
A point near the hinges and perpendicular to the door
A point near the hinges and parallel to the door
A point far away from the hinges and perpendicular to the door
A point far away from the hinges and parallel to the door
Two equal and oppositely directed forces acting on an object will be in equilibrium
Only if they act on the same point on the object
If they are separated by a distance
When they are balanced by a third force
when their moments about the same point are equal
The diagram shows a light beam pivoted at one end. What is the effort required to lift the load?
50
67
100
200
Jack has a weight of 300 N and sits 2.0 m from the pivot of see-saw. Jill has a weight of 450 N and sits 1.5 m from pivot. Who will move down?
Jack
Jill
Both of them
None of them
A nut can be loosen more easily with
A short spanner because a large turning effect can be produced
A short spanner because a larger force can be produced.
A heavy spanner because a larger force can be produced.
long spanner because a large turning effect can be produced.
The diagram shows a gauge which measures the amount of liquid in a tank. At which position should the pivot be placed so that the pointer moves the greatest distance as the tank is emptied?
A
B
C
D
What is the force F needed to balance the bar shown?
3
4
6
8
A light metre rule is allowed to pivot freely at the zero end. The other end is supported by a spring balance. A weight of 200N is then hung at the 40cm mark. The metre rule stays horizontal. What is the reading on the spring balance?
80
40
8
4
Which one of the following activities does not apply the turning effect of a force?
swinging on a swing
sliding down a slide
moving up and down on the see-saw
rowing a boat
A nut has been tightened by a force of 180 N using 8 cm long spanner. What length of a spanner is required to loosen the same nut with 150 N force
11 cm
8.5 cm
9.6 cm
10.9 cm
A force of 120 N is applied perpendicularly on a spanner at a distance of 9 cm from a nut. The torque produced by the force will be
12 Nm
10.8 Nm
15 Nm
12.59 Nm
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?
450 N
350 N
4.5 N
200 N
The figure shows a uniform metre rule pivoted at the 50cm mark. 125g and 200g weights hang from the rule as shown. Calculate where you would hang a 25g mass in order to balance the rule horizontally
20 cm from pivot on the side of 125 g mass
10 cm from pivot on the side of 125 g mass
40 cm from pivot on the side of 200 g mass
10 cm from pivot on the side of 200 g mass
