The efficiency of a machine is 50% . If 300 J of energy is given to the machine, its output is ________.

Efficiency of an ideal machine is _____.

If the efficiency of an engine is 50% and its work output is 500 J then find input.

If the efficiency of an engine is 50% and its work output is 500 J then find input.

What is the efficiency of a machine if, of the 1000 J of work done by the effort, 200 J are done in overcoming friction?

Define the term efficiency of a machine. Give two reasons for a machine not be 100% efficient?

A mass of 50 kg is raised through a certain height by a machine whose efficiency is 90% , the energy spend is 5000 J . If the mass is now released, its KE on hitting the ground shall be:

The efficiency of Carnot's enegine is 50% . The temperature of its sink is 7^(@)C . To increase its efficiency to 70% . What is the increase in temperature of the source?