1) You stand on your skateboard and exert a 50-N push on the wall next to you. If your mass is 60 kg you'll momentarily accelerate from the wall at about A) 0.8 m/s. B) 8.0 m/s2. C) 0.08 m/52. Dj none of the above 2) The force exerted on the tires of a car that directly accelerate it along a road is exerted by the Aj air. B) tires. C) engine. Dj road. E) none of the above 3) A pair of action-reaction forces always A) comprise a pair of interactions. (B) act on the same object. C) occur simultaneously. Dj all of the above E) none of the above 4) The force with which Earth pulls on the Moon is A) the only force acting between Earth and Moon. B) somewhat greater than Moon's pull on Earth. C) equal in magnitude to the force that Moon pulls on Earth. 5) Action and reaction pairs of forces A) are independent of time. B) may or may not act simultaneously. C) always act simultaneously. 6) As a ball bounces from a floor, its acceleration off the floor between bounces is A) significantly less than g. C) significantly more than g. D) slightly more than g. 7) To produce an acceleration to a system there A) may or may not be a net force on the system. By must be acceleration outside the system also. C) must be a net force on the system. 8) An airplane travels at 141 km/h toward the northeast. What is its component of velocity due north? A) 41 km/h B) 110 km/h C) 100 km/h D) 141 km/h