Question

a driver of car A travelling at 54 Km/h applies the brakes and stops the car in 4 sec. another diver of car B travelling at 36km/h applies the brakes and stops the car in 6 second plot the speed versus time graphs for the two cars which of the the two cars travelled farther before stopping. explain with the calculations

please any on help me pls ​some one please help pls

Answer 1

Answer :-

For Car A

u=54km/h=54×1000m60×60s=15m/s

v=0,t=4sec.

For Car B

u=36km/h=36×1000m60×60s=10m/s

The speed time graphs for cars A and B are as hsown in Fig.

Distance travelled by A before stopping

s1= area under vel. time graph of A=15×42=30m

Distance travelled by B before stopping

s2= area under vel. time graph of B=10×62=30m

Clearly, s1=s2