A force of 5,N acts on a body of mass 5, kg for 1, second and gives it a momentum p and kinetic ener

English

Gujarati

Hindi

5.Work, Energy, Power and Collision

easy

A force of $5\,N$ acts on a body of mass $5\, kg$ for $1\, second$ and gives it a momentum $p$ and kinetic energy $E$. If the same force accelerates the same body through $1\,m$, the momentum and energy attained by the body are $p’$ and $E’$ respectively. Which of the following relations is correct?

A

$p >p’, E > E’$

B

$p < p'\,,E < E'$

C

$p>p’, E < E’$

D

$p < p'\,,E > E'$

Solution

By $P = \sqrt {2ME} $ Both $P$ and $E$ increase because time increases

Standard 11

Physics

Share

Similar Questions

The adjoining diagram shows the velocity versus time plot for a particle. The work done by the force on the particle is positive from

easy

Masses of two substances are $1\, g$ and $9\, g$ respectively. If their kinetic energies are same, then the ratio of their momentum will be

easy

(AIPMT-1993)

A particle of mass $m$ is initially at rest at the origin. It is subjected to a force and starts moving along the $x$-axis. Its kinetic energy $K$ changes with time as $dK / dt =\gamma$ t, where $\gamma$ is a positive constant of appropriate dimensions. Which of the following statements is (are) true?

$(A)$ The force applied on the particle is constant

$(B)$ The speed of the particle is proportional to time

$(C)$ The distance of the particle from the origin increases linearly with time

$(D)$ The force is conservative

medium

(IIT-2018)

A body of mass $2\, kg$ is thrown up vertically with K.E. of $490$ joules. If the acceleration due to gravity is $9.8$$m/{s^2}$, then the height at which the K.E. of the body becomes half its original value is given by ………… $\mathrm{m}$

medium

Which of the following statements is correct ?

easy