MCQ Questions

Question No. 1

The pendulum bob of a ‘grandfather clock’ moves through a distance of 25 cm in each half-period. The period of the pendulum is exactly one second.

Answer :

a) Calculate the distance through which the pendulum will have moved in the course of three hours. Show your working clearly and neatly.

b) Calculate the average speed of the pendulum bob over this time. Express your answer in m/s. Show your working clearly and neatly.

c) Calculate the average velocity of the bob during the three hours. Show your working clearly and neatly and briefly explain your answer.

Question No. 2

What does ‘magnitude’ mean?

Answer :

Question No. 3

Why can we not add vector quantities in the same way that we add scalars?

Answer :

Question No. 4

A girl walks 2 km east, then 3 km west, then 5 km east again. What is her total displacement from her starting point?

Answer :

Question No. 5

Space is three-dimensional. Is there a fourth dimension? If so, what is it?

Answer :

a) Is there a fourth dimension?

b) If so, what is it?

Question No. 6

Mass is a scalar, but weight is a vector. Why is weight not also a scalar?

Answer :

Question No. 7

How should the word ‘torque’ be pronounced?

Answer :

Question No. 8

Answer the following Question.

Answer :

a) Briefly explain why the velocity of a body can change while its speed remains constant.

b) Is it possible for the velocity of a body to remain constant while its speed changes?

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