Q195 · Practice questionSimple familiar1 mark
QUESTION 195
At the same instant, ball A is dropped from rest and ball B is projected horizontally at from the same height above level ground. Ignore air resistance and ball size. How do their times to reach the ground compare?
(A)
(B)
(C)
(D)
WORKED SOLUTION
1 markAnswer C
ANSWER
C.
Worked solution
Both have zero initial vertical velocity, the same vertical displacement and the same vertical acceleration. Their vertical motion is identical; the horizontal velocity of B does not change its fall time.
Equivalent physically justified methods and consistent equivalent units accepted.
Displayed decimals are model answers; accept appropriate significant figures and consistent rounding from stated constants.
Select C.
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