A firefighter of mass 31 kg slides down a vertical pole with an acceleration of 4 m/s^2 The acceleration of gravity is 10 m/s^2

What is the friction force that acts on him?
Answer in units of N.

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

Which bonds are found inside a water molecule

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?