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ICSE Class 10 Answered

Cricket player holds a cricket ball of mass 100 grams by moving his hands back  by 75 CM if the initial velocity of the ball is 108 km per hour find the retarding force applied by the player
Asked by Samrat | 29 Jun, 2018, 10:28: PM
answered-by-expert Expert Answer
Initial speed of the ball = 108 km / hr = 108×(5/18) = 30 m /s
 
retardation a is obtained using the equation " v2 = u2 - 2×a×S " , with final speed v =0
 
a = u2 /(2S) = (30×30) /(2×75×10-2) = 600 m/s2
 
force = mass×retardation = 100×10-3×600 = 60 N
Answered by Thiyagarajan K | 30 Jun, 2018, 06:05: AM

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