The planets never travel in a straight line as they orbit the Sun. According to Newton's second law of motion, this must mean that .
the planets will eventually fall into the Sun
a force is acting on the planets
the planets have angular momentum
the planets are always accelerating

What is the momentum of a 2 kg object moving at 15 meters per second

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?