Two collies lift some load from the road to the roof of a bus. One of them takes 1 min. and the other takes two min. to do the same job. Who has done more work and whose power is more ?

Two men start together from the some place in the same direction to go round a circular path. If one takes 10 minutes and the other takes 15 minutes to make one complete round they will meet after

One coolie takes 1min to raise a box through a height of 2m . Another one takes 30s for the same job and does the same amount of work. Which one of the two has greater power and which one uses greater enegy?

One coolie takes 1min to raise a box through a height of 2m . Another one takes 30s for the same job and does the same amount of work. Which one of the two has greater power and which one uses greater enegy?

Two wires are of the same length, same radius, but one of them is of copper and the other is of iron. Which will have more resistance?

Two balls of equal size are dropped from the same height from the roof of a building . One ball has twice the mass of the other. When the balls the ground, how do the kinetic energies of the two balls compare ?

One coolie takes 1 min to raise a box through a height 2m. Another takes 30 m/s for the same job and does the same amount of work. Which one of these two has a greater power?

One coolie takes 1 min to raise a box through a height 2 m . Another takes 30 s for the same job and does the same job and does the same amount of work. Which one of these two has a greater power and which one uses greaster energy ?

One coolie takes two minutes to raise a box from platform to train. Another coolie takes one minjte, work done