A ball rolls down a hill from rest to a final speed of 20.0 m/s in 10.1 seconds. If the ball has a mass of 4.5 kg what is the net force acting on it?
A. 2.0 N
B. 9.0 N C. 200 N D. -45 N
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ОВ
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Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

Sodium chloride, nacl, is formed when a sodium atom transfers its electron to a chlorine atom. the difference in charge between the two atoms creates a(n) attraction that bonds them together.

The force it would take to accelerate an 900-kg car at the rate of 6m/s2