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a race car traveling northward on a straight level track at a constant speed travels 0750 km in 200 s the return trip
an airplane flying directly eastward at a constant speed travels 300 km in 20 ha what is the average velocity of the
joe cool drives to see his girlfriend who attends another collegea the 130 km trip takes 20 h what was the average
a student drives the 100 mi trip back to campus after spring break and travels with an average speed of 55 mih for 1
a group of college students eager to get to florida on a spring break drove the 630 mi trip with only minimum stops
at a track meet a runner runs the 100 m dash in 15 s what was the runners average speed a jogger jogs around a circular
a golfer on a level fairway hits a ball at an angle of 37deg to the horizontal and it travels 100 yd before striking
in a washing machine water is extracted from clothes by a rapidly spinning drum fig 325 explain the physics behind this
people can easily float in the great salt lake in utah why is this when you push on a heavy swinging door to go into a
someone suggested that a new super space station should include a basketball court so the astronauts could exercise
what are your weight in new tons and your mass in kilograms in europe you would weigh yourself in kilograms or kilos
why is it easier to tear a paper towel off a full roll than off a used smaller roll what are the two forces that
in example 34 there are external forces acting on the massesa identify these forcesb why is the linear momentum still
what are the units of linear momentum explain how the conservation of linear momentum follows directly from newtons
a large piece of iron with a volume of 025 m3 is lowered into a lake by means of a rope until it is just completely
as learned in chapter 15 a liter of water has a mass of one kilogram a thin closed plastic bag negligible weight with a
what is a major consideration in constructing a life jacket that will keep a person afloat is it easier for a large
there is an equal and opposite reaction for every force explain how an object can be accelerated when the vector sum of
when a rocket blasts off is it the fiery exhaust gases pushing against the launch pad that causes the rocket to lift
can an object be at rest if forces are being applied to it explain if no forces are acting on an object can the object
explain the principle of automobile seat belts in terms of newtons first law the gravitational force is said to have an
to tighten the loose head of a hammer the base of the handle is sometimes struck on a hard surfacefig 324 explain the
does a force always produce motion explain distinguish between a net force and an unbalanced forcetrue or false an
car b is traveling twice as fast as car a but car a has three times the mass of car b which car has the greater kinetic
a weight lifter holds 900 n about 200 lb over his head is he doing work on the weights did he do any work on the