Question

A car travelling at a speed of 20 ms^-1 applies brakes and slaps within 10 seconds. What is the acceleration of the car?

[Ans -2ms^-2]​

Answer 1

Answer:

right answer

Explanation:

Time=10 sec

U=20m/s

V=0(as the car is now at rest)

according to the 1st equation of motion:

v=u +at

0=20 + 10×a(take acceleration as a)

0-20=10a

-20÷10=a

-2m/s²=a