CBSE Class 8 Answered
what is force
Asked by pushpapanpatil | 02 Jan, 2019, 09:00: PM
Expert Answer
In mechanics, Force is defined as any action that tends to alter the motion of a body or its state of rest.
Force is push or pull given to the body to change its state of motion.
As per Newton's second law, when an external force acts on a body, it produces an acceleration (change in velocity)
of the body in the direction of the force. The magnitude of the acceleration is directly proportional to the
magnitude of the external force and inversely proportional to the quantity of matter in the body.
Because force has both magnitude and direction, it is a vector quantity.
Physicists use the newton, a unit of the International System (SI), for measuring force.
A newton is the force needed to accelerate a body weighing one kilogram by one metre per second per second.
The formula F = ma is employed to calculate the number of newtons required to give an acceleration to a mass m.
Answered by Thiyagarajan K | 03 Jan, 2019, 10:41: AM
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