Question

A particle, initially at rest starts moving with a uniform acceleration 'a'. The ratio of the distances
PHYS
KINEMATICS
5.
[ ]
covered by it in first second and the first 3 s is
a) 1:3
b) 1:5
d) 1:9
c) 1:7​

Answer 1

Answer:

a = v- u/ t

at= v-u

u = 0

and v = distance/ time

at = x(distance )/ t

x = at× t

At t = 1s ,

x1 = a × 1 × 1

x1 = a

At t = 3s

x2 = a × 3 × 3

x2 = 9a

so,

x1 / x2 = a/ 9a

x1 / x2 = 1 : 9