Home
Class 11
PHYSICS
A block of mass 2kg is free to move alon...

A block of mass `2kg` is free to move along the x-axis. It is at rest and from `t=0` onwards, it is subjected to a time-dependent force `F(t)` in the x-direction. The force `F(t)` vaies with t as shown in figure. The kinetic energy of the block after `4.5s` is

A

`4.50J`

B

`750J`

C

`5.06J`

D

`14.06J`

Text Solution

Verified by Experts

The correct Answer is:
C
Area under `F-t` curve `=4.5m//s`
`KE=1/2(2)(4.5/2)^(2)=5.06J`
Promotional Banner

Topper's Solved these Questions

  • CENTRE OF MASS

    CENGAGE PHYSICS ENGLISH|Exercise MCQ_TYPE|4 Videos

  • CENTRE OF MASS

    CENGAGE PHYSICS ENGLISH|Exercise AR_TYPE|1 Videos

  • CENTRE OF MASS

    CENGAGE PHYSICS ENGLISH|Exercise Fill In The Blanks|2 Videos

  • CALORIMETRY

    CENGAGE PHYSICS ENGLISH|Exercise Solved Example|13 Videos

  • DIMENSIONS & MEASUREMENT

    CENGAGE PHYSICS ENGLISH|Exercise Integer|2 Videos