Question

a car is moving in x direction at 20m/s and comes behind a truck and is unable to pass. The car slows to 15m/s in 2 seconds. Calculate the car's average acceleration​

Answer 1

Answer:

Hope this helps you ??

Explanation:

Initial speed of the car is u.

Final speed of the car v=0

Let the retardation of the  car be a.

Using  v  

2

−u  

2

=2aS

Or  0−u  

2

=2aS

⟹ S∝u  

2

   (for same a)

Given :  S=40m    u  

′

=2u

∴  

S

S  

′

 

​  

=  

u  

2

 

(u  

′

)  

2

 

​  

=2  

2

 

Or    

40

S  

′

 

​  

=4

⟹  S  

′

=160m