Home
Class 12
PHYSICS
A body of mass 4 kg moving on a horizont...

A body of mass 4 kg moving on a horizontal surface with an initial velocity of `6ms^(-1)` comes to rest after 3 seconds. If one wants to keep the body moving on the same surface with the velocity of `6ms^(-1)` the force required is

A

zero

B

4N

C

8N

D

16N

Text Solution

Verified by Experts

The correct Answer is:
C
Acceleration of `a=(v-u)/(t)=(0-6)/(3)=-2ms^(-2)`
Force `=mxxa=4xx8N`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • LAWS OF MOTION

    DISHA PUBLICATION|Exercise Exercise-1: Concept Builder (Topicwise) (Topic 5: Circular Motion and Banking of Road )|7 Videos

  • JEE MAINS- 2019 (HELD ON :9TH APRIL 2019 (SHIFT-I))

    DISHA PUBLICATION|Exercise QUESTIONS|30 Videos

  • MAGNETISM AND MATTER

    DISHA PUBLICATION|Exercise EXERCISE-2:CONCEPT APPLICATOR|31 Videos

Similar Questions

Explore conceptually related problems

A body of mass 2kg moving on a horizontal surface with an initial velocity of 4 ms^(-1) , comes to rest after 2 second. If one wants to keep this body moving on the same surface with a velocity of 4 ms^(-1) , the force required is

A body of mass 2kg moving on a horizantal surface with an initial velocity of comes to rest after 2 second. If one wants to keep this body moving on the same surface with a velocity of 4 ms^(-1) the force required is

Knowledge Check

  • A body of mass 1 kg moving on a horizontal surface with an initial velocity of 6m/s comes to rest after 3 seconds. If one wants to keep the body moving on the same surface with the same velocity of 6m/s, then the force required is

    A
    zero
    B
    2N
    C
    4N
    D
    8N

  • An object of mass 5 kg is sliding on a smooth frictionless horizontal surface with a constant velocity of 10 metres per second. The force required to keep the object moving with the same velocity is

    A
    0 Newton
    B
    50 Newtons
    C
    250 Newtons
    D
    500 Newtons

  • A body is moving along a rough horizontal surface with an initial velocity 6m/s m If the body comes to rest after travelling 9 m , then the coefficient of sliding friction will be

    A
    0.4
    B
    0.2
    C
    0.6
    D
    0.8

    • Similar Questions

    Explore conceptually related problems

    An object of mass 1 kg moving on a horizontal surface with initial velocity 8 m/s comes to rest after 10 s. If one wants to keep the object moving on the same surface with velocity 8 m/s the force required is

    An object of mass 5 kg is sliding on a smooth frictionless horizontal surface with a constant velocity of 10 m/s. the force required to keep the object moving with the same velocity is

    An object of mass 5 kg is sliding on a smooth frictionless horizontal surface with a constant velocity of 10 m/s .The force required to keep thhe object moving with the same velocity is

    An object moving with a velocity of 50 ms^(-1) comes to rest after 20 s. What is its initial velocity ?

    A body is moving along a straight horizontal road with a velocity of 21 m/s comes to rest after moving a certain distance. If mu between the body and the surface of road is 0.3, the distance covered is [g =9.8ms^(-2)]

    Home
    Profile