Physics, asked by Anonymous, 9 months ago

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

Answered by VishalSharma01
77

Answer:

Explanation:

As given in the figure below PR and SQ is the Speed-time graph for given two cars with initial speeds 52 km/hr and 3 km/hr respectively.

Distance Travelled by first car before coming to rest =Area of Δ OPR

= (1/2) × OR × OP

= (1/2) × 5 s × 52 kmh-1

= (1/2) × 5 × (52 × 1000)/3600) m

= (1/2) × 5 × (130/9) m = 325/9 m

= 36.11 m

Distance Travelled by second car before coming to rest =Area of Δ OSQ

= (1/2) × OQ × OS

= (1/2) × 10 s × 3 kmh-1

= (1/2) × 10 × (3 × 1000)/3600 m

= (1/2) × 10 × (5/6) m

= 5 × (5/6) m

= 25/6 m

= 4.16 m

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Answered by pranjayranjan66
0

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Explanation:

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