If earth were twice as far from the sun, the force of gravity attracting the earth to the sun would be
a. twice as strong
b. half as strong
c. one-quarter as strong.

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage