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Home » The net external torque on a system of particle about any axis is zero. Which of the following are compatible with it?a) the forces may be acting radially from a point on the axisb) the forces may be acting on the axis of rotationc) the forces may be acting parallel to the axis of rotationd) the torque caused by some forces may be equal and opposite to that caused by other forces
The net external torque on a system of particle about any axis is zero. Which of the following are compatible with it?
a) the forces may be acting radially from a point on the axis
b) the forces may be acting on the axis of rotation
c) the forces may be acting parallel to the axis of rotation
d) the torque caused by some forces may be equal and opposite to that caused by other forces
CBSE | Class 11 | NCERT Exemplar | Physics | System of particles and rotational motion
The net external torque on a system of particle about any axis is zero. Which of the following are compatible with it?
a) the forces may be acting radially from a point on the axis
b) the forces may be acting on the axis of rotation
c) the forces may be acting parallel to the axis of rotation
d) the torque caused by some forces may be equal and opposite to that caused by other forces

When net external torque on a system of particles about an axis is zero,

torque is the cross prodeuct of \vec r and \vec F = rFsin\theta \times torque=0

where,

\theta is the amgle between the distance, force and torque.

is unit vector along

So, all the four statements are true.

i

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