Forces are pushes or pulls. They can be balanced or unbalanced. If unbalanced they can change the shape of objects and change the way they are moving. Moments are turning forces.
Which of these is the best way to measure a force?
Using a force meter
Using a ruler
Using a thermometer
Forces can be:
Pushes and pulls
What is the unit of force called?
The newton, n
The newton, N
The neutron, N
What can we say about the forces on an object that is not moving?
There must only be one force acting on it
The forces must be balanced
It must be very heavy
The arrows in this diagram represent the sizes of forces acting on a stationary tennis ball. What will happen to the tennis ball?
It will stay still
It will start to move upwards
It will start to move downwards
What happens to the air resistance on a car as the car goes faster?
It stays the same
A force of 4 N acts on a lever 2 m from the pivot. What is the moment?
One way to increase the turning force on a spanner is to:
Use a shorter spanner
Use a longer pivot
Use a longer spanner
Gravity is an example of what?
A contact force
An un-contact force
A non-contact force
What store of energy does friction always produce?