1. Two identical bowling balls are held off the side of a building. One ball is rele at and the other is thrown downwards. The thrown ball is released at the same time, from the same height, as the ball released from rest. (a) Are the balls traveling at the same speed when they each hit the ground? Why or why not? expecte expecte (b) Do the balls have the same acceleration as they fall? Why or why not? the ome
Solution
using the relation final velocity ^2- initial velocity^2= 2*acceleration due to gravity*distance covered; where the acceleration due to gravity g and the distance covered x is same for both the balls. So, final velocity of ball, released from rest, when it hit the ground is (2*g*x)^1/2 and the final velocity of ball, which is thrown downwards with a velocity of u, when it hit the ground is (2*g*x+u^2)^1/2 .
(2*g*x+u^2)^1/2 > (2*g*x)^1/2 . So when they each hit the ground, The Thrown ball is travelling at a higher speed then the released ball.
The balls have the same acceleration as they fall which is the same as acceleration due to gravity.
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1- Two identical bowling balls are held off the side of a building- On.docx
1. 1. Two identical bowling balls are held off the side of a building. One ball is rele at and the other
is thrown downwards. The thrown ball is released at the same time, from the same height, as the
ball released from rest. (a) Are the balls traveling at the same speed when they each hit the
ground? Why or why not? expecte expecte (b) Do the balls have the same acceleration as they
fall? Why or why not? the ome
Solution
using the relation final velocity ^2- initial velocity^2= 2*acceleration due to gravity*distance
covered; where the acceleration due to gravity g and the distance covered x is same for both the
balls. So, final velocity of ball, released from rest, when it hit the ground is (2*g*x)^1/2 and the
final velocity of ball, which is thrown downwards with a velocity of u, when it hit the ground is
(2*g*x+u^2)^1/2 .
(2*g*x+u^2)^1/2 > (2*g*x)^1/2 . So when they each hit the ground, The Thrown ball is
travelling at a higher speed then the released ball.
The balls have the same acceleration as they fall which is the same as acceleration due to gravity.
