Advertisements
Advertisements
प्रश्न
A force of 30 N acts on a body and moves it through a distance of 5 m in the direction of force. Calculate the work done by the force.
Advertisements
उत्तर
F = 30 N
d= 5m
Work done = w = F × d
W = 30 × 5= 150 J
APPEARS IN
संबंधित प्रश्न
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
Explain by an example that a body may possess energy even when it is not in motion.
A person of mass 50 kg climbs a tower of height 72 metres. Calculate the work done. (g = 9.8 m s−2).
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
A man carrying a suitcase in his hand is walking horizontally. What is the work done against gravity?
On what factors does the work done by a force depend?
An electric motor of power 100 W is used to drive the stirrer in a water bath. If 50% of the energy supplied to the motor is spent in stirring the water. Calculate the work done on the water in one minute.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Suma is swimming in a pond.
