A boy tries to push a truck parked on the roadside. The truck does not move at all. Another boy pushes a bicycle. The bicycle moves through a certain distance. In which case was the work done more on the trick or on the bicycle? Give a reason to support your answer.
Answers
In second case the bicycle can be pushed easily
The boy simply trying to move a heavy truck parked on the side of the road leads to zero job, as the truck is not moving.
Explanation:
- Work done becomes more as the boy moves a bicycle, as the energy he places on the cycle results in the bicycle's motion.
Reason:-
- The boy simply trying to move a heavy truck parked on the side of the road leads to zero job, as the truck is not moving.
Work done : - It is said that work is completed when an object travels (displaces) in the path of force application .
To know more about work done, visit:
The work done to increase the velocity of a car of 800kg from 5m/sec to 10m/sec?
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The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:
(a) work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket.
(b) work done by gravitational force in the above case,
(c) work done by friction on a body sliding down an inclined plane,
(d) work done by an applied force on a body moving on a rough horizontal plane with uniform velocity,
(e) work done by the resistive force of air on a vibrating pendulum in bringing it to rest.
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