Idrop a penny from the top of the tower and it takes 1.85 seconds to hit the ground. what is the velocity in m/s

What is the length x of the side of the triangle below? (hint: use the cosine function)

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

The ability to make things happen is also called a. heat b. force c. matter d. energy