Ans: 4 ..
A bullet of mass 25 g strikes horizontally a block of wood with a velocity of 250 m s' and
penetrates it a distance of 1.0 m. Calculate the resistance of the wood on the bullet, assuming the
resistance to be uniform. How far would the bullet have penetrated, if the speed of the bullet had
been 200 m s-1?
Ans: – 781.25 N, 0.64 m
​

If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°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?

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.