Question

On what does the effect of force acting on an object depend? What is the impulse of force? Is it a vector quantity or scalar quantity? State its SI unit.

Answer 1

As a first step, one could read the questions well and hence note down the quantities to be found. Given the factors on which the effect of force depends. After that define the term ‘impulse’ and also give its SI unit and hence mention whether its vector or scalar quantity.

Complete step-by-step solution:
In the question, we are asked to find the factors on which the effect of a force acting on an object depends. Then we have to define the term ‘impulse of force’ and also find whether it is a vector or scalar quantity along with its SI unit.
The following are the factors on which the force acting on an object depends:
Force being a vector quantity both magnitude as well as its direction effects. Another factor is the point of application of force.
Impulse could be defined as the measure of the total effect of force, that is, this quantity basically describes the effect of force that is acting on an object during a period of time. Impulse is known to be a vector quantity that has both magnitude and direction. Its SI unit is given by Newton second (N-s).

Note: When a huge magnitude of force acts on any object for a short duration, the momentum of the body is affected greatly. The change in momentum of an object is considered equal to the impulse applied as per the impulse momentum theorem. This theorem is also known as the force law.