which of the following is responsible for earth’s magnetic field?

a

molten metals in earth’s interior

b

earth’s oceans

c

the gravitational pull of the sun and the moon

d

earth’s orbit

A12-g wad of sticky clay is hurled horizontally at a 100-g wooden block initially at rest on a horizontal surface. the clay sticks to the block. after impact, the block slides 7.5 m before coming to rest. if the coefficient of friction between the block and the surface is 0.65, what was the speed of the clay immediately before the impact?

Diego kicks a soccer ball from the end line. his fellow students time and mark the soccer ball as it moves down the field. the graph represents the ball's progress.

Which force would exist in a free body diagram of this car accelerating along the highway?