A particle is projected up the ground with speed 35 m/s . it is at height 60m at time t1 and t2. find t1+t2
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Given:
A particle is projected up the ground with speed 35 m/s . it is at height 60m at time t1 and t2.
To find:
Find t1+t2
Solution:
From given, we have,
A particle is projected up the ground with speed 35 m/s . it is at height 60m at time t1 and t2.
We use the formula,
s = ut - 1/2 gt²
substitute the given values in the above equation, we get,
60 = 35t - 1/2 × 10 × t²
60 = 35t - 5t²
12 = 7t - t²
(t - 4) (t - 3) = 0
t1 = 4
t2 = 3
t1 + t2 = 4 + 3 = 7
Therefore, the value of t1 + t2 is 7 s.
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