PHYSL1151 Seetion 02 -LAB Test 2- Two balls A and B. See fig to the right. A is

Question

PHYSL1151 Seetion 02 -LAB Test 2- Two balls A and B. See fig to the right. A is dropped from the edge of a table I meter in height. At exactly the same time that A is dropped, B is throwrn from the edge of the same table with an initial horizontal velocity o 0 f 3m/s. I- Which ball hits the ground first? A-Ball A B- Ball E C-Both hit at same time D-Not enough information to N e determine. II- Which ball has the largest acceleration? hor A-Ball A B-Ball B -Both have zero acceleration D-Both have the same non-zero acceleration E- Not enough information to determine.

Explanation / Answer

2)

I) time taken by A is t1 = sqrt(2h/g) = sqrt(2*1/9.81) = 0.45 sec

time taken by B is t2

using y = (uoy*t) +(0.5*g*t^2)

1 = 0.5*9.81*t^2

t = t2 = 0.45 sec

So the answer is C) Both hit at same time

II) both have same non zero accelaration ( g = 9.81 m/s^2)

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