Question

2. Which of the following is a combination of rectilinear and rotatory
motion?
(a) a rolling ball
(c) ringing bell
(b) a branch of a tree moving to and fro
(d) heartbeat of a healthy person
3. Which is an example of a periodic motion?
(a) Oscillation of a pendulum (b) Motion of a bus on road
(c) A spinning top
(d) A stone dropped from a certain height
4. Which of the following does not express a time interval?

(a) A day
(c) A school period
(b) A second
(d) Time of the first bell in the school
5. An example of rectilinear motion is
(a) apple falling from a tree (b) motion of a car on road
(c) a spinning top
(d) both (a) and (b)​

Answer 1

Answer:

2. a rolling ball

3.oscillation of a pendulum

4.a second

5. both a and b