Question

Give reason - 1) Fuse wire is used in the circut
2) Rocket goes in the upward direction
3) The work done by an object moving in circular direction is zero

Answer 1

Answer:

1) The fuse breaks the circuit if a fault in an appliance causes too much current to flow.

2) According to Newtons third law of motion , an equal and opposite reaction acting on the rocket pushes the rocket in the upward direction. ... To conserve the momentum of the system , the rocket moves upward with a momentum equal to the momentum of the gases .

3) The work done on a body moving in a circular path is also zero. This is because, when a body moves in a circular path, then the centripetal force acts along the radius of the circle, and it is at right angles to the motion of the body. Thus, the work done in the case of moon moving round the earth is also zero.

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