Question

Two cars A and B are at rest at same point initially. If a starts with uniform velocity of 40 metre per second and B starts in same direction with constant acceleration of 4 metre per second square ,then B will catch A after how much time ?

how to do this ques. with the concept of relative velocity??​

plz sirf relative velocity k method se btana...aur koi mt btana plz...its urgent!
​

Answer 1

Explanation:

Let distance covered by A be S

1

Let distance covered by B be S

2

B will catch A when S

1

=S

2

S=ut+1/2×a×t

2

Therefore from given data,

40t+(1/2×0×t

2

)=0t+1/2×4×t

2

40t=2t

2

20t=t

2

t=20s

is it okay dear