Advertisements
Advertisements
प्रश्न
If the work done by a force in moving an object through a distance of 20 cm is 24.2 J, what is the magnitude of the force?
Advertisements
उत्तर
Work done in moving the body, (W) = 24.2 J
Distance travelled by the body, (S) = 0.2 m
We have a relation as,
`F = W/S`
Therefore ,
`F = 24.2/0.2` N
= 121 N
APPEARS IN
संबंधित प्रश्न
An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?
Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.
A coolie does no work against the force of gravity while carrying a luggage on a road.
How is work related to energy?
A boy of mass 40 kg climbs up the stairs and reaches the roof at a height 8 m in 5 s. Calculate:
- the force of gravity acting on the boy,
- the work done by him against the force of gravity,
- the power spent by boy. (Take g = 10 m s-2)
A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.
