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WorksheetsYear 8: Moments
Total questions: 15
Worksheet time: 41mins
The turning effect of a force is called a
moment
momentum
rotation
pivot
The point at which a lever or see-saw
balances or rotates.
Pivot
Moment
Momentum
Centre
Where is the pivot on a crowbar?
Point A
Point B
Where is the pivot on the wheelbarrow shown?
Point A
Point B
The turning effect of force can make an object to turn in a ________________ and ___________ direction
Clockwise and Anti-clockwise
Up and Down
Right and Left
What TWO things does the
size of a moment depend on?
the force applied
the distance from the pivot
the length of the object
Moment (Nm) =
_______ (N) x __________(m)
Force and perpendicular distance
Energy and perpendicular distance
Momentum and perpendicular distance
Speed and time
What is moment measured in?
Newton metres (Nm)
Newtons (N)
Kilograms (kg)
How could you increase the turning effect of a spanner?
Select TWO answers.
hold the spanner closer to the pivot
hold the spanner further away from the pivot
use less force to turn the spanner
use more force to turn the spanner
A force of 5 N acts on a lever 2 m from the pivot. What is the size of the moment?
10 Nm
7 Nm
3 Nm
2.5 Nm
A force of 12 N acts on a lever 3 m from the pivot. What is the size of the moment?
36 Nm
15 Nm
9 Nm
4 Nm
What is the moment acting on the seesaw?
IF YOU ARE CONFUSED, LOOK BACK IN YOUR BOOK!
1.6 Nm anticlockwise
15 Nm anticlockwise
4 Nm clockwise
16 N clockwise
What is the moment produced by the 15 N?
CONVERT cm into m
1.5 Nm (anti-clockwise)
15 Nm (clockwise)
150 Nm (anti-clockwise)
0.15 Nm (clockwise)
When an object is in equilibrium, the sum of clockwise moments is equal to the sum of the anticlockwise moments. Which law states this?
Law of moments
Newton' law of motion
Law of conservation of energy
Law of conservation of momentum
Calculate the weight of the father!
IF YOU ARE CONFUSED, LOOK BACK IN YOUR BOOK!
600 N
800 N
700 N
500 N
