PHYSICS avatar Asked on December 27, 2019 by Nikunj Vjaya A rigid body of mass 0.3 kg is taken slowly up an inclined plane of length 10 m and height 5 m (assuming the applied force to be parallel to the inclined plane), and then allowed to slide down to the bottom again. The coefficient of friction between the body and the plane is 0.15. using g = 9.8 m/s 2 find the (a) work done y the gravitational force over the round trip (b) work done by the applied force over the upward journey (c) work done by frictional force over the round trip (d) kinetic energy of the body at the end of the trip?

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Q. A rigid body of mass 0.3 kg is taken slowly up an inclined plane of length 10 m and height 5 m (assuming the applied force to be parallel to the inclined plane), and then allowed to slide down to the bottom again. The coefficient of friction between the body and the plane is 0.15. using g = 9.8

m / s^{2}

find the
(a) work done y the gravitational force over the round trip
(b) work done by the applied force over the upward journey
(c) work done by frictional force over the round trip
(d) kinetic energy of the body at the end of the trip?

Q. A rigid body of mass 3.0 kg is taken slowly up an inclined plane of length 10 m and height 5 m, and then allowed to slide down to the bottom again. The coefficient of friction between body and the plane is 0.15. Using g = 9.8

m / s^{2}

. find the
(a) work done by the gravitational force over the round trip
(b) work done by the applied force (assuming it to be parallel to the inclined plane) over the upward journey.

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,

(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.

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1.

Compute the

(a) work done by the applied force in 10 s,

(b) work done by friction in 10 s,

(d) change in kinetic energy of the body in 10 s,

and interpret your results.

Q. A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the
(a) work done by the applied force in 10 s.
(b) work done by friction in 10 s,
(c) work done by the net force on the body in 10 s,
(d) change in kinetic energy of the body in 10 s,
and interpret your results.

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