Question

A body is moving along the +ve x-axis with uniform
acceleration of -4ms-2. Its velocity at x=0 is 10ms-1. The
time taken by the body to reach a point at x= 12 m is
(1) (2.5, 35)...
(2) (35, 45).
(3) (45,8s)
(4) (1s, 2s)​

Answer 1

Explanation:

At x=0

A=-4ms^-2

U=10

S=12m

12=10t-1/2*4*t^2

12=10t-2t^2

T^2-5t+6=0

=(t-2)(t-3)

T=2sec or 3 sec