A 2.00 kg ball is thrown upward at some unknown angle from the top of a 20.0 m high building. If the initial magnitude of the
velocity of the ball is 20.0 m/s. What is the magnitude of the
final velocity when it strikes the ground? (Note: Ignore air
resistance.)

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Compare the patterns of the two waves shown in the image. which statement is true about these waves?

What are known as the properties of substances that describe a substance et does not change that substances?