Question

A force F = (5î + 3ĵ) newton is applied over a particle which displaces it from its origin to the point r = (2î − 1ĵ) metres. The work done on the particle is

A particle is acted upon by a force of constant magnitude, which is always perpendicular to the velocity of the particle, the motion of the particle takes place in a plane. It follows that

Assertion: The instantaneous power of an agent is measured as the dot product of instantaneous velocity and the force acting on it at that instant. Reason: The unit of instantaneous power is watt.

Power of a water pump is 2 kW. If g = 10 m/s², then find the amount of water it can raise in on minute to a height of 10 m.