A 1,000-kg car traveling at 30 m/s skids 10 m before it stops. What magnitude of force is the frictional force on the car? (A) 1.5 x 103 N (B) 3.0 x 103 N (C) 4.5 x 103 N (D) 4.5 x 104 N​

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.

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Which type of basaltic lava flow has a fairly smooth