Question

A projectile is thrown with speed 60 m/s at 60
from the horizontal. It will be at same heights at
instants (g = 10 m/s2, 13 = 1.7)
(1) t = 4.5 s, t, = 6.5 s
(2) t = 3.2 s, t, = 6.8 s
(3) t, = 3.1 s, t, = 7.1 s
(4) t = 2s, t = 6s
please explain the procedure .​

Answer 1

refer to the above picture

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Answer 2

solution attached below

Explanation:

explanation in the attachment below