posted by Physics Student need help .
A plane flying horizontally above Earth’s surface at
150. meters per second drops a crate. The crate strikes
the ground 30.0 seconds later. What is the magnitude of
the horizontal component of the crate’s velocity just
before it strikes the ground?
I know the answer is 150 m/s but why?
10. A cannon elevated at an angle of 35º to the
horizontal fires a cannonball, which travels the path
shown in the diagram below. [Neglect air resistance and
assume the ball lands at the same height above the
ground from which it was launched.]
If the ball lands 7.0 × 10² meters from the cannon 10.
seconds after it was fired, what is the horizontal
component of its initial velocity?
(A) 7.0 m/s (B) 35 m/s (C) 49 m/s (D) 70. m/s
oops but that's another question