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Answered by
4
Answer:
1.02 seconds
Explanation:
Answered by
4
Answer:
Using equation => V² - u² = 2as
=> v² = 2×10×20 - 0
=> v² = 400
=> v = 20
Ball strike ground with speed =20m/s
Time =( v-u) /a =( 20-0)/10= 2s
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