A projectile is fired from the top of a 40 m high cliff with an initial speed of 50 m/s at an unknown angle. Find its speed when it hits the ground. (g = 10 m/s 2 )
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
( 
m/s)
Sol. 
K = – 
U
⇒ 
m (v 2 – u 2 ) = mgH
⇒ v 2 = u 2 + 2gH
= (50) 2 + 2 × 10 × 40
v = 
m/s.
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