Question
Question: A girl after being angry throws here engagement ring from the top of a building 12 m high towards he...
A girl after being angry throws here engagement ring from the top of a building 12 m high towards her boy friend with an initial horizontal speed of 5 ms-1, speed with which the ring it touches the ground is
A
5 ms-1
B
14.3 ms-1
C
1.5 ms-1
D
16.2 ms-1
Answer
16.2 ms-1
Explanation
Solution
vy2 = 2ay = 2 × 10 × 12
v = 25+240 = 16.2 ms-1.