A person is sitting on a sled and someone is about to push them down a hill. Which statement is accurate?
1: Forces acting on the sled are paired with unequal and opposite forces.
2: Forces acting on the sled are paired with the force of gravity only.
3: Forces acting on the sled are paired with equal and opposite forces.
4: Forces acting on the sled are paired with the force of friction only.

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

True or false graphs must include scales that increase by the same amount

Convection currents are caused by differences in what two things?