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a force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete
a vertical spring is 100 cm long when supporting a 200 kg mass and it is 120 cm long when supporting a 320 kg mass
consider the motion of an apple and the earth as the apple falls to the ground if the apple begins at the top of a tree
a man standing154m in front of a shaving mirror produces an inverted image200cm in front of it how close to the mirror
a dedicated sports car enthusiast polishes the inside and outside surfaces of a hubcap that is a section of a sphere
a gass has 100 j of energy in the form of heat is transfered to a system and the system does 150 j of work what is the
an open railroad car of mass 2496 kg is coasting with an initial speed of 17 ms on a frictionless horizontal track it
two blocks of weights 450 and 830 n are connected by as massless string and slide down an inclined plane making an
a 130 horizontal beam is supported at each end a 310 piano rests a quarter of the way from one endwhat is the vertical
space probes communicate with controllers on earth using radio waves suppose a probe has a radiotransmitter that
a converging lens of focal length 0187 m forms a virtual image of an object the image appears to be 0875 m from the
a beaker containing 300ml of water at 20 clesius has a 150g piece of aluminum at 50 celsius placed in it what is the
an investigator finds a fiber at a crime scene that he wishes to use as evidence against a suspect he gives the fiber
stationary l 302-m board of mass 456 kg is hinged at one end a force f is applied vertically at the other end and the
the membrane of the axon of a nerve cell is a thin cylindrical shell of radius r 10-5 m length l 042 m and thickness
the average resistivity of the human body is 5 ohmm the conducting path between two hands is approximated as a cylinder
an oscillating lc circuit has a current amplitude of 710 ma a potential amplitude of 250 mv and a capacitance of 200
two polarizers are out of alignment by 241deg if light of intensity 100 wm2 and initially polarized halfway between the
an astronaut is tethered by a strong cable to a spacecraft the astronaut and her spacesuit have a total mass of 104
a 518- physics student stands on a bathroom scale in an 846- including the student elevator that is supported by a
an air bubble has a volume of180cm3when it is released by a submarine105m below the surface of a lake what is the
a weather balloon is designed to expand to a maximum radius of17m at its working altitude where the air pressure is
two people start at the same place and walk around a circular lake in opposite directions one has an angular speed of
a 195-watt light bulb uses an average power of 195 w when connected to an rms voltage of 120 va what is the resistance