Question

16. A particle starts its motion from rest under the action of
constant force. If the distance covered in the first 10 s is x
and that covered in the first 20 s is y then
(1) y = 2x
(2) y = 3x
(3) y = 4x
(4) y=x
​

Answer 1

Answer:

y = 2x

Explanation:

speed = distance / time

distance = speed x time

For t = 10s, distance is x

so   x = 10 x Speed

For t = 20s, distance is y

so    y = 20 x speed

taking them as a fraction,

x = 10 x Speed

y = 20 x speed

so x/y = 1/2

so y = 2x