4. A driver of a car A travelling at a uniform speed of 54 km/h for 10

1.	4. A driver of a car A travelling at a uniform speed of 54 km/h for 10 s applies the brakes and decelerates uniformly.The car stops in 5 s. Driver of car B going at 36 km/h for 10 s applies the brakes slowly and stops after 10 seconds.Plot the speed-time graph of both cars and find out which of the two cars travelled farther after the brakes were applied?
Answer» Answer: B travelled farther than car A Explanation: SPEED of A=54km/h =15m/s Speed of B= 36km/h =10m/s After PLOTTING the GRAPHS, Distance travelled by A= 1/2155 m = 37.5 m Distance travelled by B= 1/21010 m = 50 m conclusion: B travelled farther than A (after applying brakes).

4. A driver of a car A travelling at a uniform speed of 54 km/h for 10 s applies the brakes and decelerates uniformly.The car stops in 5 s. Driver of car B going at 36 km/h for 10 s applies the brakes slowly and stops after 10 seconds.Plot the speed-time graph of both cars and find out which of the two cars travelled farther after the brakes were applied?

Answer»

Answer:

B travelled farther than car A

Explanation:

SPEED of A=54km/h

=15m/s

Speed of B= 36km/h

=10m/s

After PLOTTING the GRAPHS,

Distance travelled by A= 1/2*15*5 m

= 37.5 m

Distance travelled by B= 1/2*10*10 m

= 50 m

conclusion: B travelled farther than A (after applying brakes).

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