English

Two students were asked to plot a distance-time graph for the motion described by Table A and Table B. Table A Distance moved (m) 0 10 20 30 40 50 Time (minutes) 0 2 4 6 8 10 Table B Distance moved - Science

Advertisements
Advertisements

Question

Two students were asked to plot a distance-time graph for the motion described by Table A and Table B.

Table A
Distance moved (m) 0 10 20 30 40 50
Time (minutes) 0 2 4 6 8 10
Table B
Distance moved (m) 0 5 10 15 20 25
Time (minutes) 0 1 2 3 4 5


The graph given in figure is true for

Options

  • both A and B.

  • A only.

  • B only.

  • neither A nor B.

MCQ
Advertisements

Solution

both A and B.

Explanation:

Distance time graph for uniform motion shows a straight line. Slope is the same for both table A and table B. 

shaalaa.com
  Is there an error in this question or solution?
Chapter 13: Motion and Time - MULTIPLE CHOICE QUESTIONS [Page 68]

APPEARS IN

NCERT Exemplar Science [English] Class 7
Chapter 13 Motion and Time
MULTIPLE CHOICE QUESTIONS | Q 3. | Page 68

RELATED QUESTIONS

A driver of a car travelling at 52 km h−1 applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 s. Another driver going at 3 km h−1 in another car applies his brakes slowly and stops in 10 s. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied?


The speed-time graph for a car is shown in the following figure:

  1. Find how far the car travels in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
  2. Which part of the graph represents uniform motion of the car?

Which of the following distance-time graphs shows a truck moving with speed which is not constant?


A car is travelling at 20 m/s along a road. A child runs out into the road 50 m ahead and the car driver steps on the brake pedal. What must the car’s deceleration be if the car is to stop just before it reaches the child ?


A spaceship is moving in space with a velocity of 60 kms−1. It fires its retro engines for 20 seconds and velocity is reduced to 55 kms−1. Calculate the distance travelled by a spaceship in 40 s, from the time of firing of the retro- rockets.


Two friends leave Delhi for Chandigarh in their cars. A starts at 5 am and moves with a constant speed of 30 km/h, whereas B starts at 6 am and moves with a constant speed of 40 kmh-1. Plot the distance-time graph for their motion and find at what time the two friends will meet and at what distance from Delhi.


What are the uses of the graphical study of motion?


Distance between Bholu’s and Golu’s house is 9 km. Bholu has to attend Golu’s birthday party at 7 o’clock. He started from his home at 6 o’clock on his bicycle and covered a distance of 6 km in 40 minutes. At that point, he met Chintu and he spoke to him for 5 minutes and reached Golu’s birthday party at 7 o’clock. With what speed did he cover the second part of the journey? Calculate his average speed for the entire journey.


Boojho goes to the football ground to play football. The distance-time graph of his journey from his home to the ground is given in the figure.

  1. What does the graph between points B and C indicate about the motion of Boojho?
  2. Is the motion between 0 to 4 minutes uniform or non-uniform?
  3. What is his speed between 8 and 12 minutes of his journey?

Assertion: The slope of the distance-time graph of a body moving with high speed is steeper than the slope of the distance-time graph of a body with low velocity.
Reason: Slope of distance-time graph = speed of the body.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×