If force acts on a body, whose line of action does not pass through its centre of gravity, then the body will experience
The center of gravity is the point where an object’s weight is evenly distributed, acting as the balance point.
Class 11 Physics
Systems of Particle & Rotational Motion
CBSE EXAM 2024-25
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When a force acts on a body, and its line of action does not pass through the center of gravity, the body experiences two effects: linear acceleration and angular acceleration. Linear acceleration occurs as the force pushes or pulls the body in a specific direction. This is due to the body’s response to the applied force, which causes a change in its state of motion.
At the same time, since the line of action of this force does not pass through the center of gravity, a torque is developed. Torque is defined as the rotational effect developed due to the application of the force at a distance from the center of gravity. Thus, this torque causes angular acceleration, and hence, the body rotates around an axis. The combined effects of the linear acceleration and angular acceleration influence the motion of the body.
For example, when you push a door at its edge, it rotates around its hinges because of the torque generated, and the force exerts a linear effect as well. Similarly, if you apply force to a spinning top at any point other than its center, it causes rotation and a change in position as well. So, whenever the line of action of the force misses the center of gravity, both types of acceleration occur.
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