Question

7. 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)
8. 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​

Answer 1

Answer:

7. a) apple falling from a tree

8. a) Oscillation of a pendulum

Explanation:

7.a) apple falling from a tree is an example of rectilinear motion because any metal object in free fall, which is under the influence of gravitational forces is rectilinear motion.

8.a) All oscillatory motions are periodic because each oscillations gets completed in a definite interval of time. Eg: On being pulled and then released, a load attached to a spring executes oscillatory motion. On the other hand, all periodic motions may not be oscillatory.