From the top of a 490 m high cliff
Asked by admin @ in Physics viewed by 317 People
From the top of a 490 m high cliff a boy throws a stone horizontally with an initial speed of 15m/s. find the speed with which the stone hits the ground
Asked by admin @ in Physics viewed by 317 People
From the top of a 490 m high cliff a boy throws a stone horizontally with an initial speed of 15m/s. find the speed with which the stone hits the ground
Answered by admin @
This is a question on horizontal projection.
The horizontal velocity is constant.
The vertical velocity changes with time.
Given the vertical distance and the initial velocity we will use the following equation of motion to get the final velocity.
V² = U² + 2gs
S = 490
g = 10
U = 15
V² = 225 + 9800
V² = 10025
V = √10025 = 100.12
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