NECO Physics Past Questions & Answers - Page 18

Which of the following statements is/are correct in any machine?

I. The velocity ratio is usually greater than the mechanical advantage.
II. Efficiency work inputwork outputIII. The velocity ratio is independent of friction.

An object of mass 5.0 cg moving with a velocity of 12ms^-1 due north hits a stationary body of mass 7.0kg. If they stick together after collision and move with velocity V due north, calculate the magnitude of V.

Which of the following is NOT a component of an a.c. generator?

Which of the following is a non-renewable energy source?

The escape velocity of an object from the gravitational field of a planet

I. Increases with the mass of the object
II. Increases with the mass of the planet
III. Is smaller on the moon than on the earth. Which of the above statements is/are correct?