Home
Class 12
PHYSICS
An object moving with a speed of 6.25 m...

An object moving with a speed of `6.25 m//s ` is declerated at a rate given by ` (dv)/( dt) =-2.5sqrtv` where v is instantaneous speed . The times taken by the object , to come to rest ,would be:

A

2 s

B

4 s

C

8 s

D

1 s

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

An object , moving with a speed of 6.25 m//s , is decelerated at a rate given by : (dv)/(dt) = - 2.5 sqrt (v) where v is the instantaneous speed . The time taken by the object , to come to rest , would be :

An object is subjected to retardation, (dv)/(dt)=-5sqrtv , which has initial velocity of 4ms^(-1) . The time taken by the object to come to rest would be

A particle initially (i.e., at t = 0) moving with a velocity u is subjected to a retarding force, as a result of which it decelerates a=-ksqrt v at a rate where v is the instantaneous velocity and k is a positive constant. The time T taken by the particle to come to rest is given by :

The speed(v) of a particle moving along a straight line is given by v=(t^(2)+3t-4 where v is in m/s and t in seconds. Find time t at which the particle will momentarily come to rest.

The motion of a particle moving along x-axis is represented by the equation (dv)/(dt)=6-3v , where v is in m/s and t is in second. If the particle is at rest at t = 0 , then

An object is being thrown at a speed of 20 m/s in a direction 45^(@) above the horizontal . The time taken by the object to return to the same level is

A 210 meter long train is moving due north at a of 25 m/s. a small bird is flying due south a little above the train with speed 5 m/s. The time taken by the bird to cross the train is

A car travelling with a speed 125 KMPH along a straight line comes to rest after travelling a distance 245 m.The time taken by the car to come to rest,in second is

The displacement of a particle is given by y=(6t^2+3t+4)m , where t is in seconds. Calculate the instantaneous speed of the particle.

An object of m kg with speed of v m s^(-1) strikes a wall at an angle theta and rebounds at the same speed and same angle. Find the magnitude of change in the momentum of object.