Which of the following statements ARE correct?
Group of answer choices:
A) If net torque is zero, the object will be moving at constant velocity or remain static.
B) If the net torque is zero, the object will not rotate or rotate at constant angular velocity.
C) If net torque is zero, the angular momentum is conserved.
D) If net force is zero, the object will be rotate at constant angle velocity or not rotate at all.

Option A, C and D are correct statements.

Explanation:

Torque is the twisting effect of a force which causes an object to acquire angular acceleration.

The direction of the torque depends on the direction of the force on the axis. The SI unit for torque is the Newton-meter.

The net torque is the sum of the individual torques.

If the net torque on a rotatable object is zero then:

1. It will be in rotational equilibrium and the angular velocity of the body remains constant.

2. It will be in rotational equilibrium and not able to acquire angular acceleration. Thus, it will not be able to acquire angular velocity.

3. Angular momentum will be conserved.

If the forces on an object are balanced, the net force is zero.

If there net force on an object is zero, its speed and direction of motion do not change, including if it is at rest, the object will not accelerate and the velocity will remain constant.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.