A particle is moving along a straight line wi | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The angular momentum $L$ of a particle about a point is given by the vector product $L = r 	imes p$,where $r$ is the position vector of the parti

Vedclass · Accepted Answer

Remains zero

Vedclass · Answer

(D) The angular momentum $L$ of a particle about a point is given by the vector product $L = r 	imes p$,where $r$ is the position vector of the particle relative to the point and $p = mv$ is the linear momentum.Since the particle is moving along a straight line,the position vector $r$ and the velocity vector $v$ (and thus the momentum vector $p$) are collinear.For any two vectors that are collinear,the cross product is zero.Therefore,$L = r 	imes p = |r||p| \sin(0^\circ) = 0$.Since the angular momentum is zero at all times,it remains zero regardless of the change in speed of the particle.

$A$ particle is moving along a straight line with increasing speed. Its angular momentum about a fixed point on this line ............

Similar Questions

If the ionic product of water $(K_w)$ is $1.96 \times 10^{-14}$ at $35^{\circ} C$,what is its value at $10^{\circ} C$?

Three liquids of densities $\rho_1, \rho_2$ and $\rho_3$ (with $\rho_1 > \rho_2 > \rho_3$) having same value of surface tension $T$,rise to the same height in three identical capillaries. Angle of contact $\theta_1, \theta_2$ and $\theta_3$ respectively obey

The radius of the sphere $x^2+y^2+z^2=12x+4y+3z$ is

Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest $pH$?

$A$ flywheel is in the form of a solid circular disc of mass $72 \, kg$ and radius $0.5 \, m$. If it rotates at $70 \, r.p.m.$,then the rotational kinetic energy is approximately ....... $J$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module