Question

A car initially at rest starts with a uniform acceleration and gains a velocity of 20 ms. in 4 s. The
displacement of the car is
a) 40 m
b) 80 m
c) 120 m
d) 160 m​

Answer 1

Answer:

80

Explanation:

Answer 2

t = 4s ; u = 0 m/s ; v = 20m/s

a = (v-u)/t = (20/4 )m/s2 = 5 m/s²

now we know that ,

v²= u² + 2as => 20*20 = 0² +(2. s.5 ) => 400/10 = s

=> s = 40

•°• displacement = s = 40m