Two baseballs are thrown from the roof.
of a house with the same initial speed,
one is thrown up, and the other is down,
compare the speeds of the baseballs
just before they hit the ground.

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping