Forces

1. How can we measure a force?

1.1. Forces are measured with force-meters. Spring balance are force-meters. -Extension spring balances -Compression spring balances

1.1.1. In a compression spring balance, the spring is compressed when a force acts on it.

1.2. In a compression spring balance, the spring is compressed when a force acts on it.

2. What are the effects of forces?

2.1. A force can: Change the speed of a moving object Change the shape or size of an object Start an object moving or stop a moving object. Change the direction of a moving object

3. What is a force?

3.1. A force is a push or pull. Whenever we push or pull something, we are said to exert a force. E.g. Lifting/ bending/ stretching/twisting/ squeezing involves pushes and pulls