a. 40 m/s down
potential energy = m g h
same h
so same potential energy
so same kinetic energy (1/2)m v^2
b.
how long up
0 = 40 - g t
t = 40/9.81
2 t = time up + time down = 80/9.81
a parabola, sheds water
y = 40 t - 4.9 t^2
a ball is shot upwards from ground level at a vertical speed of 40 m/s.
a. What is the vertical speed of the ball just as it hits the ground? Explain.
b. How long is the ball in the air? Explain.
c. Draw a height vs time graph of the situation. Include a point at each 1-second interval
1 answer
1 answer