Home
Class 11
PHYSICS
A particle moves in a straight line with...

A particle moves in a straight line with a constant acceleration. It changes its velocity from `10 ms^-1` to `20 ms^-1` while passing through a distance `135 m` in `t` seconds. The value of `t` is.

A

1) 10

B

2) 1.8

C

3) 12

D

4) 9

Text Solution

Verified by Experts

The correct Answer is:
D
Let u and v be the first and final velocity of particle and a and s be the constant accleration and distance by it
using `v^(2)= u^(2)+2as`
. `Rightarrow(20)^(2)= (10)^(2)+ 2axx135`or
`a= (300)/(2xx135)= (10)/(9)ms^(-2)`
Now using , V =u + at
`t= (v-u)/(a)= (20-10)/(10//9)= (10xx9)/(10)=9s`
Promotional Banner

Similar Questions

Explore conceptually related problems

A particle moves in a straight line with a constant acceleration.It changes its velocity from 10m/s to 20m/s while covering a distance of 135m in t second.What is the value of t?

A particle is moving on a straight line with constant retardation of 1 m//s^(2) . Its initial velocity is 10 m//s .

Find the acceleration of the car, if it changes its velocity from 20 m s^(-1) to 30 ms^(-1) in 5 seconds.

A particle moves in a straight line with constant acceleration If it covers 10 m in first second and 20 m in next second find its initial velocity.

Average velocity of a particle moving in a straight line, with constant acceleration a and initial velocity u in first t seconds is.

A particle is moving along a straight line with constant acceleration. At the end of tenth second its velocity becomes 20 m//s and in tenth second it travels a distance of 10 m . Then the acceleration of the particle will be.

A particle is moving in a straight line under constant acceleration of 4 m//s^(2) . If its velocity at t=0 is 10 m//s, the displacement of particle in the 5^(th) second of its motion is

A particle moves in a straight line with an acceleration a ms^-2 at time 't' seconds where a = - (1)/(t^2) When t = 1 the particle has a velocity of 3 ms^-1 . Find the velocity of the particle at t = 4 s .