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Full Playlist Link:   • Class 9 Physics (New Session 202324)...  

✅ In this video,

✔ Class: 9
✔ Subject: Physics
✔ Chapter: Force and Laws of Motion
✔ Topic Name: Momentum
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00:00 Physics Introduction: Force and Laws of Motion
00:06 Momentum
12:13 Question & Solution: Momentum: Physics
21:11 Website Overview
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Momentum
F ∝ V
F ∝ m
F ∝ m x V
Both the quantities are required for the force to be applied.
F ∝ P (momentum)
Momentum:
Momentum is defined of a body as the product of its mass and velocity.
It is a vector quantity
SI unit = kg.ms1

Question. What is the p of a man of mass 75 kg when he walks with a uniform velocity of 2 m/s.

Question. An object’s momentum is 80 kg m/s and its mass is 16000 G. Find the velocity of the object.
Solution. p = 80 kg m/s
m = 16000gm = 16 kg
p = mv
80 = 16 x v
v = 80/16

Question. Calculate the momentum of the following
An elephant of mass 2000 kg moving at 5 m/s.
A bullet of mass 0.02 kg moving at 400 m/s.

Question. What is the change in momentum of a car weighing 1500 kg when its speed increases from 36 km/hr to 72 km/hr uniformly. .

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