A man throws a ball weighing 500 gm vertically upwards with the speed of 10 m/s. Find:
(a) What will be its initial momentum?
(b) What would its momentum be at the highest point?
Answers
Answered by
18
(a) 5N/sec[p=mv]
(b) Zero. Because velocity of the ball will be zero at the higest point
(b) Zero. Because velocity of the ball will be zero at the higest point
ritzpro:
No u r worng
Use MKS system
see 500 Gram not 500 KG
Ok. And, it's given that SPEED = 10 m/s. Is speed and velocity same?
No, Speed has no direction but velocity do have a direction their magnitudes could/could not be same
That I know, but my question is that, here it is given that speed = 10 m/s. But p = mv , v = velocity. Then how can u place 10 m/s in place of v?
cause there is no change in direction.
Ok, and how come the momentum at the highest point is zero?
cause the velocity will be zero at the highest point due to negative acceleration
THANK U! :)
Answered by
30
Initial velocity (u) = 10 m/s
Final velocity (v) = 0 m/s (at the highest point, speed becomes zero)
Mass (m) = 500 gm = 500/1000 = 0.5 kg
(a) Initial momentum = Mass × Initial velocity
= 0.5 × 10
= 5 kg.m/s
(b) Momentum at the highest point = Final momentum
= Mass × Final velocity
= 0.5 × 0
= 0 kg.m/s
Final velocity (v) = 0 m/s (at the highest point, speed becomes zero)
Mass (m) = 500 gm = 500/1000 = 0.5 kg
(a) Initial momentum = Mass × Initial velocity
= 0.5 × 10
= 5 kg.m/s
(b) Momentum at the highest point = Final momentum
= Mass × Final velocity
= 0.5 × 0
= 0 kg.m/s
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