Work and Energy...

(i) What is the work done by the porter when he climbs up a height of 10 m $$\displaystyle (g\quad = 10\ {ms} ^{-2})$$? 

A force of $$5\ N$$ causes a displacement of $$10\ m$$ in its direction. Calculate the work done by the force.

What is the work done by a force of 2 N in displacing a body by 2 m in the direction of the force?

An electric heater has a rating of 2 kW, 220 V. The cost of running the heater for 10 hours at the rate of Rs 350 per unit is Rs ____

What is the work done by gravity on a load of $$50 \ kg$$ carried by porter while walking along the platform?

The energy directly related to the speed of a moving body and its mass is:

A heavy object has .......  gravitational potential energy than a lighter one.

The electricity tariff in a town is $$Rs.3.00$$ per unit. Calculate the cost of running an $$80 W$$ fan for $$10 h$$ a day for the month of June.

Which one of the following types of energy is possessed by a body when placed at a certain height?

Calculate the work done when a 2N force moves a body through a distance of 10 m.