You toss a ball straight up at 6.8 m/s ; it leaves your hand at 2.0 m above the floor. suppose you had tossed a second ball straight down at 6.8 m/s (from the same place 2.0 m above the floor). when would the second ball hit the floor?

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?