Physics Past Questions and Answers

An object of mass m moves with a uniform speed v round a circular path of radius r. If its angular speed is \(\omega\), the magnitude of the centripetal force acting on it is

A \(m \omega^2 r\)
B \(\frac{mv^2}{r}\)
C \(m \omega r\)
D \(\frac{mv^2}{r^2}\)

Question 1587:

When an elastic material is stretched by a force, the energy stored in it is

A Kinetic
B Potential
C Thermal
D Electrical

Question 1588:

When the linear momentum of a body is constant, the net force acting on it

A Is zero
B Increases
C Decreases
D Remains constant

Question 1589:

If no net force acts on an object, the object maintains a state of rest or constant speed in a straight line. The above is a statement of Newton's

A First law of motion
B Second law of motion
C Third law of motion
D Law of universal gravitation

Question 1590:

Which of the following pairs of physical quantities is made up of vectors?

A Speed and displacement
B Mass and force
C Dislacement and acceleration
D Momentum and length