Calculate the power consumed by an engine to lift a mass of 200 kg up to 50 m is 10 seconds.(g = 10 m/s²).

A spring constant is 4 x 10³ N/m. How much work will be done to compress the spring to 0.04 m?

To stretch a spring 0.02 m, work done is 0.4 J. Calculate spring constant.

5 appliances are used 10 hours per day in a house. Out of which 2 appliances are of 200 w and three are of 400 W. Then calculate the amount electric energy consumed in units.

A force is applied on a body moving with speed of 2 m/s and its mass is 40 kg after appling the force its velocity increases to 5 m/s. Calculate the work done by the force.