You are watching that guy on his bike jump off a ramp again. Where will you...
You are watching that guy on his bike jump off a ramp again. Where will you see his vertical velocity become zero?
a) at the top of the trajectory
b) right before he hits the ground again
c) when he first jumps off the ramp
d) nowhere on the trajectory
Homework Answers
The vertical velocity of the bike is the rate at which its height is increasing. If the vertical velocity is positive, that is upwards, then its height is increasing.
If the vertical velocity is negative, the height is decreasing.
At the top of the trajectory the vertical velocity of the object is zero.
We can see this by the following reasoning, if the vertical velocity is positive, its height is still increasing so it can't be at top, and if the vertical velocity is negative, its height is decreasing it means, it is not at the top at some earlier moment. Hence at the top verical velocity is Zero.
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