Advertisements
Advertisements
प्रश्न
The work done on an object does not depend on ______.
विकल्प
displacement
applied force
initial velocity of the object
the angle between force and displacement.
उत्तर
The work done on an object does not depend on the initial velocity of the object.
Explanation:
W = Fs cosθ
According to the formula of work, we come to know that the work done on an object does not depend on the initial velocity of the object.
APPEARS IN
संबंधित प्रश्न
Power spent by a body depends on the time for which it does work.
When does a force perform work?
State the S.I. unit of energy.
Define 1 joule of energy.
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
Explain degradation of energy by taking two examples of your daily life.
State the SI unit of work.
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?
A uniform circular motion is an accelerated motion. Justify it.
Is the motion of moon around the earth in circular path an accelerated motion?
On what factors does the work done by a force depend?
A block of mass 20 kg is pulled up a slope (fig.12) with a constant speed by applying a force of 500 N parallel to the slope. A and B are initial and final positions of the block.
(a) Calculate the work done by the force in moving the block from A and B.
(b) Calculate the potential energy gained by the block.
Define Translational motion.
If a ball is dropped on the sloping roof of a house, it acquires ______ and falls on the ground. That is the transformation of ______ energy into ______ energy takes place.
(kinetic, potential, motion)
A proton is kept at rest. A positively charged particle is released from rest at a distance d in its field. Consider two experiments; one in which the charged particle is also a proton and in another, a positron. In the same time t, the work done on the two moving charged particles is ______.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.