Monohar Pandey Solutions for Exercise 1: Exercise 1

A body starting from the rest moves along a straight line with constant acceleration. Which one of the following graphs represents the variation of speed $\left(\mathrm{v}\right)$ and distance $\left(\mathrm{s}\right)$?

Which among the following graphs represents a body is moving with infinite velocity?

A simple pendulum is vibrating in an evacuated chamber. It will

Assertion (A) A body moving in a circular path is acted upon by the centripetal force.
Reason (R) Centripetal force acting on the body is doing work to keep it rotating in the circular path.

Consider the following statements about periodic motion
1. Any motion that repeats in equal intervals of time is called a periodic motion.
2. The motion of the earth about its axis is a periodic motion.
3. The motion of the position of an engine, the motion of a pendulum, the motion of an electron in an atom etc. are the examples of periodic motion.
Which of the statement(s) given above is/are correct?

If a pendulum clock is brought inside an artificial satellite, then the time period of the clock becomes

Consider the following statements
1. On increasing the length of the pendulum, the time period of pendulum will increase.
2. The time period of a simple pendulum doesn't depend upon its mass.
Which of the statement(s) given above is/are correct?

Consider the following statements
1. In summer season, the effective length of the pendulum clock is lengthened (increased length}, so its time period is also increased and consequently the clock becomes slow.
2. In winter season, the effective length is contracted thus time period is decreased and the clock becomes fast.
Which of the statement(s) given above is/are correct?