a ball of mass 0.4 kg thrown up in the air with velocity 30m/s reaches the highest point in 2.5 sec. The air resistance encountered by the ball during the upward motion is
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Considering it is thrown upwards ,
So , it's initial velocity = 30m/s
and final velocity = 0m/s [ as the ball will stop at the highest point ]
Time = 2.5 Seconds
So , Acceleration (a) = v-u/t
=} 0-30/2.5 =} -300/25 =} -12m/s²
Now , Force = Mass x Acceleration
=} 0.4KG x -12m/s²
=} -4.8 N
So , the air resistance encountered by the ball during upward motion is -4.8 Newton or -4.8 KGm/s²
HETA1208:
Your answer is wrong.....
Answered by
1
Answer:
correct answer is 0.88N
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