Author Question: An object falls freely from a height, H. It is released at t = 0 and strikes the ground at t = T. ... (Read 120 times)

nenivikky · **on:** Jul 28, 2018

An object falls freely from a height, H. It is released at t = 0 and strikes the ground at t = T. Consider the time at which the object is at a height of H/2. Also consider the height at which the object is located at the time T/2. Which of the following is true?
1.When the object is at a height H/2, the time is less than T/2 and when the time is T/2, the object is at a height of less than H/2.
2.One cannot tell which of these choices may be true from the given information.
3.When the object is at a height of H/2, the time is equal to T/2.
4.When the object is at a height H/2, the time is greater than T/2 and when the time is T/2, the object is at a height of more than H/2.

Question 2

Ball A is thrown up and Ball B is thrown down, both with the same initial speed. Neglecting air resistance, just prior to hitting the ground, which of the following is true?
1.You cannot tell which has the greater speed because it depends on the value of the initial speed.
2.Ball A's speed is greater than Ball B's speed.
3.They have the same speed.
4.Ball B's speed is greater than Ball A's speed.