# NCERT Class 7 Science Chapter 13 Motion and Time Extra Questions

## NCERT Class 7 Science Chapter 13 Motion and Time Extra Questions and Answers

Class 7 Science Chapter 13 Extra Questions and Answers – Motion and Time. Here in this Page Class VII Students can Learn Extra Questions & Answer 13th Chapter Science fully Inside.

We Provided Here Motion and Time Science Chapter 13 Long Answer Type Question, Very Short Type Questions (VSA) / MCQ Type Questions, Short Type Questions (SA).

### Class 7 Science Chapter 13 Extra Question with Answer – Motion and Time

Science Chapter 13 Motion and Time Class 7 Inside 5 Marks, 3 marks, 2 Marks & And 1 Marks Important Questions and Answers.

1)  Fill in the Blanks:

a) The basic unit of speed is ___. (m/s)

b) Periodic events are used for the measurement of ___. (Time)

c) The distance moved by an object in a unit time is called its ___. (Speed)

2)  Multiple Choice Questions:

a) The time taken by the pendulum to complete on oscillation is called its___?

a) Oscillation b) Time period

Ans. b) Time period

b) The meter that measures the distance moved by the vehicle is known as ___?

a) Odometer b) Speedometer

Ans. a) Odometer

c) The meter that records the speed directly in km/h is called ___?

a) Odometer b) Speedometer

Ans. b) Speedometer

a) What are uniform and non-uniform motion?

Ans. If an object moving along a straight line with a constant speed, its motion is said to be uniform motion.

If the speed of an object moving along a straight line keeps changing, its motion is said to be non-uniform motion.

b) Give an example of periodic motion. State the use of periodic motion of a pendulum.

Ans. The motion of a giant wheel is an example of periodic motion.

Periodic motion of a pendulum has been used to make clocks and watches.

c) What is time period? What is the basic unit of time?

Ans. The time taken by the pendulum to complete one oscillation is called its time period.

The basic unit of time is a second.

d) A car has to cover a distance of 51km in 3 hours. What should be the speed of the car?

Ans. A car has to cover a distance of 51km in 3 hours.

The speed of the car should be (51/3) = 17km/h.

e) A boy runs 15km in 1.5 hours. How long will he take to run 40km at double the previous speed?

Ans. A boy runs 15km in 1.5 hours.

His speed is (15/1.5) = 10km/h

He will take time to run 40km at double the previous speed is (40/10) = 4 hours.

f) Time = 40s, Speed = 4m/s what is the distance?

Ans. Time = 40s,        Speed = 4m/s

Distance = (Time * Speed) = (40 * 4) = 80m.

In case you are missed :- Previous Chapter Extra Questions

4)  Classify the following as motion along a straight line, circular or oscillatory motion:

a) Motion of an elevator : Straight line motion

b) Motion of merry-go-round : Circular motion

c) Motion of a child on a swing : Oscillatory motion

d) Motion of the Earth revolving around the Sun : Circular motion

e) Parade of army : Straight line motion

f) Motion of a fan : Oscillatory motion

5)  A simple pendulum consists of a small metallic ball or a piece of stone suspended from a rigid stand by a thread. The metallic ball is called the bob of the pendulum. When the bob of the pendulum is released after taking it slightly to one side, it begins to move to and fro. The to and fro motion of a simple pendulum is an example of a periodic or an oscillatory motion.

a) The metallic ball is called the ___ of the pendulum. (Bob)

b) The to and fro motion of a simple pendulum is an example of a ___ motion. (Oscillatory)

In case you are missed :- Next Chapter Extra Questions