Beginner mechanics 2

Classical Mechanics Level 1

A ball falls freely from the top of a tower on a sandy soil . Its velocity when reaching the ground is 90 m/s . Given that the free fall acceleration is 10 m/s², and the sand resistance to the ball motion is 3000N

Find the ball mass if it sank into sand and stopped 1 second later

  • write the answer to the nearest tenth

NOTE : The air resistance is neglected


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