Energy and forces

Question 1 of 10

Two 6 Ω resistors are connected in parallel. Find the total resistance.

Question 2 of 10

Which is a non-renewable energy source?

Question 3 of 10

A machine has efficiency 75% and velocity ratio 8. What effort lifts a load of 600 N?

Question 4 of 10

Energy stored in a stretched catapult is

Question 5 of 10

The SI unit of work and energy is the

Question 6 of 10

A car of mass 1000 kg moving at 10 m/s has kinetic energy

Question 7 of 10

Three resistors of 2 Ω, 3 Ω and 5 Ω are connected in series. Find the total resistance.

Question 8 of 10

A car of mass 1,000 kg accelerates from 10 m/s to 30 m/s. The work done by the engine (ignoring friction) is

Question 9 of 10

Which is a renewable source of energy?

Question 10 of 10

The efficiency of a machine that gives 400 J output for 500 J input is