In which of following cases forces may not be required to keep the

English

Gujarati

Hindi

4-1.Newton's Laws of Motion

easy

In which of the following cases forces may not be required to keep the

A

Particle going in a circle

B

Particle going along a straight line

C

The momentum of the particle constant

D

Acceleration of the particle constant

(AIIMS-1983)

Solution

(c)If momentum remains constant then force will be zero because$F = \frac{{dP}}{{dt}}$

Standard 11

Physics

Share

Similar Questions

A player caught a cricket ball of mass $150\ \mathrm{~g}$ moving at a speed of $20\ \mathrm{~m} / \mathrm{s}$. If the catching process is completed in $0.1\ \mathrm{~s}$, the magnitude of force exerted by the ball on the hand of the player is ………. $N$

medium

(AIPMT-2001) (AIEEE-2006)

A jet of liquid of cross-sectional area $'a'$ strikes a wall making angle $\theta $ with wall. The water strikes with the wall with velocity $v$ and rebounds elastically. If density of liquid be $\rho $, the normal force on the wall is

medium

At a place where the acceleration due to gravity is $10\,m\,{\sec ^{ – 2}}$ a force of $5\, kg-wt$ acts on a body of mass $10\, kg$ initially at rest. The velocity of the body after $4$ second is ………. $m/\sec^{-1}$

medium

A ball of mass $0.2\, kg$ moves with a velocity of $20 \,m/sec$ and it stops in $0.1 \,sec$; then the force on the ball is ……….. $N$

easy