Question

The brakes applied to a car produce an acceleration of 6 ms-2 in the opposite direction
to the motion. If the car takes 2s to stop after the application of brakes, calculate the
distance it travels during this time.

Answer 1

Answer:

12m

Explanation:

Given:

Accerleration: a=−6 m/s  

2

 

Time t=2 s

Final velocity, v=0 m/s

v=u+at

0=u−6×2

u=12 m/s

s=ut+  

2

1

​  

at  

2

 

s=12×2+  

2

1

​  

×(−6)×4

⇒s=12 m

Answer 2

Explanation:

s = 1/2 × 6 ×4

=12 m

this is the answer