Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
P.E = mgh = 1 x 10 x 1 = 10J
APPEARS IN
संबंधित प्रश्न
In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east, as shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or zero.
State two conditions when no work is done by a force.
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
MULTIPLE CHOICE TYPE
In an electric cell which in use, the change in energy is from:
How much work is done when a force of 1 N moves a body through a distance of 1 m in its own direction?
Give two examples of couple action in our daily life.
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
