Question

A car initially at rest starts moving with an acceleration of 4 ms? The time in which it picks up a velocity of 72 ms-'is

a) 16 s
b) 18 s
c) 15 s
d)20
​

Answer 1

Step-by-step explanation:

From equation of motion v

2

=u

2

+2aS

v

2

=(0)

2

+2×0.5×25

or v

2

=25

or Final velocity v=

25

=5ms

−1

Answer 2

Answer:

18 s hope this is the correct answer