Question

1. A constant horizontal force is exerted on
an object resting on a frictionless smooth
table. Which of the following quantities of
the object will not change during motion ?
​

Answer 1

Answer:

its direction will not change unless another force is applied

Answer 2

Answer:

During motion the quantities of the object will not change are : mass and acceleration.

Explanation:

• Force: The push or pull is called force. The SI unit of force is Newton and CGS unit of force is Dyne.
• The formula for force is, force = mass × acceleration
• Mass is the quantity of constituents by which an object is made of. As the constituent for any object can not be changed, so the mass for an object is constant always. It does not depend on the motion.

       So, we can write force ∝ acceleration.

• Acceleration is the rate of change of velocity. As the applied force is constant so the acceleration must be constant.

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