7) You are in a train traveing on a horizontal track and slide directy toward th

Question

7) You are in a train traveing on a horizontal track and slide directy toward the front of the train. From this observation, you can concludle that this slide directy toward the front of the train From this observation, you can conclade thatt train is jchanging drection A) slowing down. 8) speeding up Di E)slowing down and changing direction D) speeding up and changing direction 8) To produce an acceleration to a system there A) must be a net force on the system B) may or may not be a net force on the syslen C) must be acceleration outside the system also 9) Stand a broom upright on the end of its pole and let it topple to the floor Repeat, but with e ) the sane either way bristles end an the floor. The laster fall will be the br staniding on its A) bristles-end ) pole-end 10) A sow track everts a fonoe of 3000 N on a car, whach then accelerabes at 2 mu, What is the mas of the car? A) 1500 kg B) 500 kg C) 3000kg D) 1000 kg E) none of these walker mone easuly balances on a light wine if her pale hort but heavy B) is held high faling olject encouniters 10 N of air resintance. The net force on tdhe oltis D)4N E) none of these 13) A mosquito flying a, 3 mis that encounters a breeze blowing at 3 m "inte--damtum ha· m, speed od By 3 m/s 14) A satellite is in orbit around the earth. Which one feels the greater force? 14) A) The earth because the satelite has so little mass B) Earth and the satellite feel exactly the same force C) The satelite because the earth is so much more massive D) it depends on the distance of the satellite from Earth 15) Nellie Newton puls her sled by a rope that is 45" to the herizontal The henzontel and l components of force are A) egual in magnitude B) each about 07 titmes the lorce she eerts os the rope C) both od these D) neither of these

Explanation / Answer

7) slowing down ;option A

8)must be a net force on system ; option A

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