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A ball is dropped from a height of 50m ? Find the velocity of the ball just before it reaches the ground . do you required the value of the mass to find the velocity |
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Answer» v = 10√10 m/sExplanation:Given :A BALL is dropped from a height of 50 mTo find :the velocity of the ball just before it REACHES the groundSolution :As the ball is dropped, the initial velocity of the ball is 0 m/s The distance the ball has travelled from height of 50 m to the ground is 50 m S = 50 mUsing third equation of motion, v² - u² = 2aswherev denotes final VELOCITYU denotes initial velocitya denotes acceleration of the objects denotes the distance covered by the OBJECTIN this case, a = G = 10 m/s²Substitute the values, v² - 0² = 2(10)(50) v² = 1000 v = √1000 v = 10√10 m/sTherefore, the velocity of the ball just before it reaches the ground is 10√10 m/sWe calculated the velocity of the ball without using it's mass as in the expression we used, there is no term of mass. So, we do not require the value of mass to find the velocity. |
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