Question

Can you please help me with the Practice it on the Exercise? The Exercise it where I really need help . Thanks!(:

QUESTION How would the answer to part (b), the maximum height, change if the person throwing the ball jumped upward at the instant he released the ball? The maximum height would decrease. The maximum height would remain the same. The maximum height would increase. Consider how the initial velocity of the ball relative to the ground is affected by the motion of the person throwing it. Then consider how this affects the maximum height PRACTICE IT Use the worked example above to help you solve this problem. A ball is thrown from the top of a building with an initial velocity of 25.0 m/s straight upward, at an initial height of 58.0 m above the ground. The ball just misses the edge of the roof on its way down, as shown in the figure. (a) Determine the time needed for the ball to reach its maximum height. 2.55 (b) Determine the maximum height 31.9 (c) Determine the time needed for the ball to return to the height from which it was thrown, and the velocity of th ball at that instant Time Velocity 25 5.1 m/s (d) Determine the time needed for the ball to reach the ground. (e) Determine the velocity and position of the ball at t 5.42s. Velocity Position m/s EXERCISE HINTS: GETTING STARTED I'M STUCK! A projectile is launched straight up at 60.5 m/s from a height of 72 m, at the edge of a sheer cliff. The projectile falls, just missing the cliff and hitting the ground below. (a) Find the maximum height of the projectile above the point of firing. (b) Find the time it takes to hit the ground at the base of the cliff (c) Find its velocity at impact.

Answer 1