A small ball is thrown horizontally from a height of with an initial speed of . Neglecting air resistance and taking , what is the magnitude of the ball's velocity just before it hits the ground?
Options
A
14.14 m/s
B
10 m/s
C
20 m/s
D
0 m/s
Answer & Analysis
Answer
A
Analysis
To find the magnitude of the ball's
velocity just before it hits the ground, we need to consider both the
horizontal and vertical components of the velocity.
Given:
Height
Initial horizontal speed
Acceleration due to gravity
Calculate the time of flight
The time it takes for the ball to fall to
the ground can be calculated using the formula for vertical motion:
Calculate the vertical component of the
velocity
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