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2 years ago

6

A cricket ball is dropped from a height of 20 m. Calculate: a) the speed of the ball. b) the time it takes to fall through this

height

1 answer:

AysviL [449]2 years ago

7 0

Answer:

Initial velocity is 0 .. ( since it is just dropped)

now using V²= u² +2gh

=> (Vfinal)² = 0+2*10*20

=> v² = 20*20 = 400

=> v = √400 = 20m/s

for time taken

use V = u+gt

=> t = V/g = 20/10 = 2sec

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What is the magnitude of the torque that the axle must apply to prevent the disk from rotating?

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The torque required is <u>19.62 N·m counterclockwise</u>

Reasons:

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