Question

a stone of mass 2kg and its velocity changes to 4m/s in 10m/s of same direction , Then change of stone​

Answer 1

11th/Physics

Newton's law of motion

Answer :

Mass of stone = 2kg

Initial velocity = 4m/s

Final velocity = 10m/s

We have to find change in momentum of stone$.$

_________________________________

◈ Momentum is measured as product of mass and velocity.

• P = mass × velocity

It is a vector quantity having both magnitude as well as direction.

SI unit : N s

✵ Initial momentum :

⇒ Pi = m × u

⇒ Pi = 2 × 4

⇒ Pi = 8 N s

✵ Final momentum :

⇒ Pf = m × v

⇒ Pf = 2 × 10

⇒ Pf = 20 N s

✵ Change in momentum :

➝ ΔP = Pf - Pi

➝ ΔP = 20 - 8

➝ ΔP = 12 N s