Question

4 point
19. A staircase contains three steps each 10 cm high
and 20 cm wide as shown. The minimum horizontal
velocity of a ball rolling off the uppermost plane, so
as to hit directly the lowest plane is
(a) 1 m/s
(c) 3 m/s
(b) 2 m/s
(d) 4 m/s​

Answer 1

Explanation:

(c) 3 m/s right answer uuu

Answer 2

Answer:

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