The whale shark is the largest of all fish and can have the mass of three adult elephants. Suppose that a crane is lifting a whale into a tank for delivery to an aquarium. The crane must exert an unbalanced force of 2.5 x 10 N to lift the shark from rest. If the shark’s acceleration while being lifted equals 1.25 m/s, what is the shark’s mass?

Aballet student who learns with the of his instructor is demonstrating learning.

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?

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?