NCERT Class VII Science Solutions: Chapter 13-Motion and Time Part 2

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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

The Distance-Time Graph

Loading Image

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: