Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • 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.

Q 5.   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?

Answers (1)

best_answer

The initial speed  =52\times \frac{5}{18}=14.4 \frac{m}{s}            [1km/h= 5/18 m/s]

After 5 sec the car stops

The graph is represented by the blue line (the x-axis is time and the y-axis is speed) 

For the car with 3Kmh-1. Initial speed =3\times\frac{5}{18}=0.833\frac{m}{s}  .  The graph which is represented by the golden line

The area covered by the blue graph is greater than the golden graph, so the car with 15 m/s initial velocity travels a large distance.

Posted by

HARSH KANKARIA

View full answer

Similar Questions

Trending Articles/News

anam-khan

Board Exam Date 2025 Live: Bihar Class 10, 12 model papers out, time table soon; updates on CBSE, UP
anam-khan

CBSE Class 10 board exams from February 15 to March 18; download date sheet 2025 PDF

Latest Question