Question

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

Answer 1

Answer:

(A) : Initial speed of the car A u=52 kmh

−1

=52×

18

5

​

=14.44 ms

−1

The car stops in 5 seconds i.e v=0 at t=5

(A) : Initial speed of the car A u=3 kmh

−1

=3×

18

5

​

=0.83 ms

−1

The car stops in 10 seconds i.e v=0 at t=10

With the help of these initial and final points for both the cases, we can plot the graph of speed vs time.

Area under the speed-time graph gives the distance covered.

∴ Distance covered by car A x

A

​

=

2

1

​

×14.44×5=36.1 m

∴ Distance covered by car A x

B

​

=

2

1

​

×0.83×10=4.15 m

Thus car A travels more distance than B

Explanation:

refer the attachment pls thanku