Distance
force
vector addition
decreases
projectile motion displacement
mass
increases
vector subtraction
linear motion time
speed
positive
equally
vector multiplication velocity
gravity
negative
unequally
centripetal motion
short answers:
20. which of the following variables are vectors: distance, speed, displacement, acceleration, or velocity?
21. every winter, greg flies hom to chicago (644 miles from little rock). it takes 2 hours. what is greg’s velocity?
22. a race car travels around a curve at a constant speed. is the race car accelerating? why or why not?

1.in one challenge on the titan games, competitors have to lift 200 pounds up a long ramp. angel is able to move the weight in 42 seconds. anthony gets it done in only 38 seconds. which statement is true? angel has more power than anthony. angel does more work than anthony. anthony does more work than angel. anthony has more power than angel. 2.a mountain climber exerts 41,000 j of work to climb a cliff. how much power does the climber need if she wants to finish in only 500 seconds? power = work / time 20,500,000 watts 82 watts 0.0122 watts 41,500 watts 3.your family is moving to a new apartment. while lifting a box 83 joules of work is done to put the box on a truck, you exert an upward force of 75 n for 3 s. how much power is required to do this? (hint: you only need two of the 3 numbers given! ) power = work / time 249 watts 25 watts 2075 watts 27.7 watts

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.