Torque & Angular Momentum: JEE Questions & Solutions

A uniform rod of mass m and length l suspended by means of two identical inextensible light strings as shown in figure. Tension in one…

Two cars A and B each of mass 10^3 kg are moving on parallel tracks separated by a distance of 10 m, in same direction with speeds 72 km/h…

When the position vector r = x i+y j+z k changes sign as r - r, which one of the following vectors will not flip under sign change?

The position vectors of two 1 kg particles, (A) and (B), are given by rA = ( 1 t i + 2 t^2 j + 3 t^3 k) m and rB = ( 1 t i + 2 t^2 j + 3…

The torque due to the force ( 2 i + j + 2 k) about the origin, acting on a particle whose position vector is i + j + k, would be:

A circular disk of radius R meter and mass M kg is rotating around the axis perpendicular to the disk. An external torque is applied to the…

An object of mass m is projected from the origin in a vertical xy-plane at an angle 45^ with the x-axis with an initial velocity v0. The…

The coordinates of a particle with respect to origin in a given reference frame is (1, 1, 1) meters. If a force of F = i - j + k acts on…

Three equal masses m are kept at vertices (A, B, C) of an equilateral triangle of side a in free space. At t = 0, they are given an initial…

A square Lamina OABC of length 10 cm is pivoted at O. Forces act at Lamina as shown in figure. If Lamina remains stationary, then the…

Which of the following are correct expression for torque acting on a body? A. = r L B. = d dt( r p) C. = r d p dt D. = I E. = r F ( r=…

A cube having a side of 10 cm with unknown mass and 200 gm mass were hung at two ends of an uniform rigid rod of 27 cm long. The rod along…

A body of mass 5 kg moving with a uniform speed 3 2 m/s in the X-Y plane along the line y = x + 4. The angular momentum of the particle…

A force of -P k acts on the origin of the coordinate system. The torque about the point (2, -3) is P (a i + b j). The ratio of ab is x2.…