Force, Work, Energy and Power — Physics STD 10 — Question

Is centrifugal force a real force?

Energy can exist in several forms and may change from one form to another. For the following, state the energy changes that occur in:
explosion of crackers.

Name the type of energy possessed by a body due to a change in configuration.

Name the phenomenon responsible in the following case:
Apparent bending of a stick in water

Is there any change in temperature during the change of phase?

A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?

What do you mean by thermal capacity?

At which point is the centre of gravity situated in a triangular lamina.

A force of 50 dynes acts on a rigid body, such that the perpendicular distance between the fulcrum and the point of application of force is 75 cm. Calculate the moment of force.

State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.