Question

Give any 2 precautions while observing the focal length of a concave mirror

Answer 1

• Precautions we should keep while observing the focal length of concave mirror are:-

• The stationary object should be kept at a distinct distance.

• Clean concave mirror should be used for the experiment.

PLEASE MARK IT AS BRAINLIST.

Answer 2

Answer:Rate of change of velocity is called acceleration.

Explanation:

For ex--:A cyclist moving through a busy street does not have uniform velocity . The velocity of the cyclist may change in magnitude or direction or both . In such case the cyclist is said to have an accelerated motion