A rock with a mass of 55 kg is on top of a cliff that is 27 m high. Calculate the gravitational potential energy of the rock. A 14553 J
B. 145.5 J
c. 91.8 J
D. 2.3 J

Prompta snowboarder stands at the top of a hill and decides to see if he can increase his speed on his next trip down the slope. describe one thing the snowboarder could do to incrlase his speed on the slope. explain why this would cause his speed toincrease relate one of newton's laws to this problem.

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

What is the measurement of how fast an object moves relative to a reference point?