Correct Answer - Option 3 : Both 1 and 2
CONCEPT:
Linear Momentum:
-
The linear momentum of a body is the quantity of motion contained in the body.
- It is measured in terms of the force required to stop the body in unit time.
- It is also measured as the product of the mass of the body and its velocity i.e.,
⇒ Momentum (p) = mass (m) × velocity (v)
⇒ P = mv
Newton's second law of motion:
- According to Newton's second law of motion, the rate of change of momentum of a body is directly proportional to the applied unbalanced force.
- The magnitude of the force is given as,
\(⇒ F=\frac{dP}{dt}\)
EXPLANATION:
⇒ Momentum (p) = mass (m) × velocity (v)
⇒ its unit is kg-m/sec.
- According to Newton's second law of motion, the magnitude of the force is given as,
\(⇒ F=\frac{dP}{dt}\)
⇒ dP = F.dt -----(1)
By equation 1 the unit of momentum is given as Newton-sec.
- Hence, option 3 is correct.
