Question

A car accelerate at 1.5 m/s2 in a straight road . how much is the increase in velocity in 4 s?

Answer 1

Explanation:

We can solve this problem by using the formula :

v=u+ at

where -

v is the final velocity acquired

u is the initial velocity

a is the acceleration

t is the time taken by the car

Now, in our problem, the car accelerates at 1.5m/s^2 for 4 seconds. That gives us a final velocity v of u+(4×1.5) which is u+6 m/s. So our increase in velocity is 6m/s. The straight road part tells us that the direction remains constant. Hence the velocity vector changes only in magnitude.