A. The ball's (vertical) velocity at time is
so that after 4 seconds, the ball's speed is
(The velocity is -10 m/s, so the ball is falling back down at this point.)
B. At maximum height, the ball has zero velocity, so it takes
for the ball to reach this height.
C. The height of the ball at time is
The maximum height is attained by the ball at 3 seconds after it's thrown, so
D. The time it takes for the ball to reach its maximum height is half the time it spends in the air. So the total airtime is .
Put another way: When the ball returns to the height from which it was thrown, its final velocity has the same magnitude as its initial velocity but points in the opposite direction. This is to say, after the total time the ball is in the air, it's final velocity will be -30 m/s. Then the total airtime is
Put yet another way: Solve for . I don't see a need to elaborate...
Answer:
27.8 cm answer right or wrong I don't know
Answer:
the answer is 50
Explanation:
u simply divide 750 by 15 which will equal 50.