Concepts Of Physics MCQ Edition [Volume 1]PhysicsRotational Mechanics

Calculate the total torque acting on the body shown in the figure about the point O .

Options

A0.54 N m
B0.27 N m
C0.81 N m
D1.08 N m

Correct answer

A. 0.54 N m

Step-by-step solution

Resolve each force in the figure and compute its moment about O using = r F , taking clockwise torques as negative. Summing all contributions gives a net torque magnitude of 0.54 N m .

Practice Rotational Mechanics on Quantrex Academy →

More from Rotational Mechanics

A wheel revolves about its axis with a uniform angular acceleration. Beginning from rest, it attains 100 rev/sec in 4 seconds. Determine the angular acceleration and the angle rota Starting from rest, a wheel is uniformly accelerated at 4 rad/s ^2 for 10 seconds. Subsequently, it rotates uniformly for the next 10 seconds, and is finally brought to rest over t Determine the angular velocity of a body rotating with an acceleration of 2 rev/s ^2 as it completes the 5 th revolution after starting.A body rotates about a fixed axis with an angular acceleration of one radian/second/second . Determine the angle through which it rotates during the time in which its angular veloc A disc of radius 10 cm rotates about its axis with an angular speed of 20 rad/s . Determine the linear speed of a point situated on the rim.A disc of radius 10 cm rotates about its axis with an angular speed of 20 rad/s . Determine the linear speed of the middle point of a radius.A disc rotates about its axis with a uniform angular acceleration of 4 rad/s ^2 . Determine the radial and tangential accelerations of a particle located 1 cm from the axis at the A block is suspended from a string wrapped on a disc of radius 20 cm , which is free to rotate about its fixed horizontal axis. If the angular speed of the disc is 10 rad/s at a pa Full Rotational Mechanics list All Concepts Of Physics MCQ Edition [Volume 1] PYQs