The length of the arrow shows the magnitude, eg the size of the force in the first arrow. Back to top. Contact forces. Contact forces act between two objects that are physically touching.

First, the forces. Yes, there are two force probes — one on each mass. Both of the force sensors give the same force. This means the tension on mass 1 has the same magnitude as the tension on ...

A constant magnitude centripetal force that is always perpendicular to the direction of motion will make the object move in a circle. It is important to note that centripetal force is still some ...

A force is a push or a pull that acts on an object. There are many kinds of force. Find out more with BBC Bitesize. For students between the ages of 11 and 14.