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a child whose weight is 270 n slidesdown a 62 m playground slide that makesan angle of 20deg with the horizontal the
a projectile is fired horizontally with an initial speed of500 ms neglect air resistancea what is the magnitude of the
top professional pitchers can throw fastballs at speeds of100mph given that 1 mph0447ms what is this speed in meters
a 1200-kg car rolling on a horizontal surface has speed v65kmh when it strikes a horizontal coiled spring and is
a 2-kg mass is attached to a spring hanging vertically from the ceiling of an elevator with the elevator moving up at a
suppose that during the launch of a rocket from the surface of the earth an astronaut onboard the rocket stands on a
the net force acting on an object constrained to the x axis is given by fxx x3 - 4x the force is in newtons and xin
a 330 multiplied by 102 gsample of methanol at 280degc ismixed with 330 multiplied by 102 gof water at 600degc assume
a 215 multiplied by102 g metal block at 800degc is placed in 150 multiplied by102 g of water at 100degc the final
a positive charge q1 is located to the left of a negative charge -q2 on a line passing through the two charges there
a rubber ball of mass 245 g is droppedfrom a height of 205 m onto a floor the velocity of the ball is reversed by the
the electric field midway between two equal but opposite point charges is 1430 nc and the distance between the charges
suppose you are performing the down hill run ofthe experiment you did this week what is the energy ratioefei of a
the position of a mass oscillating on a spring is given byx 97 cm cos2pit 271 sa what is the period of this motionsb
a 0400 kg block of wood hangs from the ceiling by a string and a74x10-2 kg wad of putty is thrown straight upward
a child rocks back and forth on a porch swing with an amplitude of0100 m and a period of 529 s assuming the motion is
in the ammonia nh3 molecule of figure 9-39 three hydrogen h atoms form an equilateral triangle with the center of the
a a typical adult human lung contains about 330 million tiny cavities called alveoli estimate the average diameter of a
a 182 kg weather rocket is loaded with 97 kg of fuel and firedstraight up it accelerates upward at 2998 ms2 for349 s
a light-rail train going from one station to the nexton a straight section of track accelerates from rest at 229ms2 for
an object is thrown vertically upward with aspeed of 5 ms it lands on the floor with a speed of 6 msfrom what height
a 27-ft chain with mass density4 lbft is initially coiled on theground how much work in ft-lbs is performed in lifting
in a movie tarzan evades his captors by hiding underwater for manyminutes while breathing through a long thin reed
a 2900 kg truck traveling north at41 kmh turns east and accelerates to 56 kmha what is the change in the trucks kinetic
a cubic box of volume 37 multiplied by 10-2m3 is filled with air at atmospheric pressure at20degc the box is closed and