Home
Class 12
PHYSICS
A body of mass m = 4 kg starts moving wi...

A body of mass m = 4 kg starts moving with velocity `v_(0)` in a straight line is such a way that on the body is being doen at the rate which is proportional to the square of velocity as given by `P = beta v^(2)` where `beta = ( 0.693)/( 2)`. Find the time elapsed in seconds before velocity of body is doubled.

Text Solution

Verified by Experts

The correct Answer is:
8
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS

    FIITJEE|Exercise NUMERICAL BASED QUESTIONS DECIMAL TYPE|5 Videos

  • KINEMATICS

    FIITJEE|Exercise PARAGRAPH -XIII|2 Videos

  • HEAT AND TEMPERATURE

    FIITJEE|Exercise NUMERICAL BASES QUESTIONS|1 Videos

  • LAWS OF MOTION

    FIITJEE|Exercise COMPREHENSION-III|2 Videos

Similar Questions

Explore conceptually related problems

A body of mass 1kg is moving along a straight line with a velocity of 1m//s . The external force acting in the body is

0A body of mass 20 kg moving with a velocity of 3 m//s, rebounds on a wall with same velocity. The impulse on the body is -

A body of mass m/2 moving with velocity v_0 collides elastically with another mass of m/3 . Find % change in KE of first body

A body of mass m travels in a straight line with a velocity v = kx^(3//2) where k is a constant. The work done in displacing the body from x = 0 to x is proportional to:

A body of mass m moving with a velocity v strikes a statioinalry body of mass m and sticks to it. What is the speed of the system?

If the velocity of a body moving in a straight line is proportional to the square root of the distance traversed, then it moves with

A body of mass m is thrown straight up with a velocity Mq. Find the velocity u' with which the body comes down if the air drag equals cu^(2) where c is a constant and u is the velocity of the body.

A body starts from rest and acquires a velocity V in time T .The work done on the body in the time t is proportional to

Knowledge Check

  • A body of mass 1kg is moving along a straight line with a velocity of 1m//s . The external force acting in the body is

    A
    `1N`
    B
    1 dyne
    C
    `1J`
    D
    zero

  • A body of mass 2kg is moving on a smooth floor in straight line with a uniform velocity of 10m//s Resultant force on the body is

    A
    20N
    B
    10N
    C
    2N
    D
    Zero

  • A body of mass m/2 moving with velocity v_0 collides elastically with another mass of m/3 . Find % change in KE of first body

    A
    32
    B
    96
    C
    34
    D
    80