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Year 7 Forces Flashcards | StudBud
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Year 7 Forces
Year 7 Forces
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Newton's Laws review #physics
Flashcards
17 cards
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Practice quiz
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Questions
17
Answers
1
A sliding object experiences 8 N of friction. The force needed to maintain constant speed is
exactly 8 N
less than 8 N
more than 8 N
2
Which is not an example of a force:
tension
gravity
normal
speed
3
What is the net force in this diagram?
0 N
30 N right
60 N and 30 N right
90 N right
4
Gravity is a contact force.
False
True
5
Which of the following will increase friction?
Wooden Dowels
Adding mass
Smoothing the surface
Oil
6
Which of the following is measured in Newtons?
Mass
Weight
Direction
Speed
7
The unit for force is the Newton (N)
False
True
8
Friction is a contact force.
True
False
9
Your mass would decrease if you went to the moon.
False
True
10
A 10 Newton falling mass encounters 6 Newtons of air resistance. The net force on the mass is
16 Newtons up
4 Newtons down
4 Newtons up
16 Newtons down
11
Weight is measured in kilograms.
False
True
12
A book weighs 4 N. When it is at rest in your hand, the net force on the book is:
10 N
40 N
0 N
4 N
13
Which is not an effect of friction?
heat
deceleration
wear
acceleration
14
Which of the following is a disadvantage of friction?
Allows us to walk without slipping
Carpet burn
Cavemen could make fire
Chains allow vehicles to grip on icy roads
15
Your weight would decrease if you went to the moon.
False
True
16
Which has balanced forces:
A boat slowing into port
A rocket launching
A horse tied to a post
A car accelerating at an intersection
17
What is the net force?
12 N left
12 N right
20 N
12 N
