NCERT Class VII Science Solutions: Chapter 13-Motion and Time Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 4:

The distance between two stations is . A train takes to cover this distance. Calculate the speed of the train.

Answer:

Question 5:

The odometer of a car reads when the clock shows the time . What is the distance moved by the car, if at , the odometer reading has changed to ? Calculate the speed of the car in during this time. Express the speed in also.

Answer:

Distance covered by car Time taken between

So, speed in

Speed in

Question 6:

Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of , calculate the distance between her house and the school.

Answer:

Now,

Question 7:

Show the shape of the distance-time graph for the motion in the following cases:

  1. A car moving with a constant speed.
  2. A car parked on a side road.

Answer 7:

This Diagram Shows Time and Distance Graph

Question 8:

Which of the following relations is correct?

Answer:

Question 9:

The basic unit of speed is:

Answer:

Question 10:

A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is:

Answer:

II.

Solution:

Case I:

Case II:

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