Question

Jeric, a professional rooftop futbol player, kicked a 𝟒.𝟎 [𝒌𝒈] ball off a rooftop that is 𝟓𝟎 [𝒎] off the ground, at 𝟏𝟎 [𝒎/𝒔] oriented 30° degree above his horizon. His pal, Joshua, caught the ball from a window at a distant building that is 𝟐𝟓 [𝒎] off the ground. Joshua then released the ball from this height and let the ball fall to the ground. What is the speed of the ball just before it reaches Joshua? What is the speed of the ball just before it reaches the ground?

Answer 1

1)

$$v^2=10^2+2(9.8)(50-25)\\v=24.3\frac{m}{s}$$

2)

$$u^2=2(9.8)(25)\\u=22.1\frac{m}{s}$$