Understanding the concept of power

If a force   moves an object from rest to reach a velocity   , calculate the power.

Maria drew a bucket of water weighing 10 N from a well in 25 s. If the depth of the well is 5 m, how much power did Maria require to draw the bucket of water? 

Suppose, we have a graph where work done is plotted against time. The instantaneous power at any point can be calculated by _______________.

If the work done in a particular time is doubled, then the power will be _____________.

If work done is negative, the average power would be ____________.

How much power does Sam require to do 5 J of work in 2 s? 

An ice-hockey puck is sent speeding across the field by a force of 10 N. What is the power required to hit the puck such that its final velocity is 3 m/s (assuming that the puck travels in the same direction of the force)? 

If a force of 5 N acting at an angle 60 degrees to the horizontal accelerates an object from rest rightward such that it reaches a velocity of 10 m/s, what is the average power required to do so? 

A rough surface brings a box of mass 500 g travelling at 3 m/s to rest in 5 s. What is the power exerted by the rough surface to stop the box?

Earl has a mass of 72 kg. What is the amount of power he requires to climb a flight of stairs that stands 10 m tall in 20 s? 

An airplane of mass 1500 kg gains altitude at the rate of 5 m/s. What is the power required by its engine to achieve this?

Find the angle at which a force of 3 N acts on an object if its final velocity is 16 m/s and the work done is 24 W.

If two forces act on the object, the power due to forces should be _____________.

If the time taken to do work is doubled, then the power will be _____________.

If a two person bicycle is maintained at a speed of 20 m/s with a force of 225 N, what is the power required by each rider assuming they both contribute equally?