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a 90 kg man lying on a surface of negligible friction shoves a67 g stone away from himself giving it a speed of 40 ms
a softball of mass 0220 kg that is moving with a speed of 85ms collides head-on and elastically with another ball
a 23-g bullet traveling 230 ms penetrates a 20-kg block ofwood and emerges cleanly at 170 ms if the block is stationary
the flywheel of a motorhas a mass of 35 kg and a moment ofinertia of 58 kg m2 the motor develops aconstant torque of
with the engines off a spaceship is coasting at a velocity of230ms through outer space the ship carries rockets that
a gymnast is bouncing on a trampoline on theupward part of the motion the mat of the trampoline pushes on thegymnast
in screeching to a halt the car leaves skid marks that are 65m long the coefficient of kinetic friction between the
a stroboscope is a light that flashes on and off at a constantrage it can be used to illuminate a rotating object and
calculate the blackbody temperatures k from the peak wavelengths given in a through b and the peakwavelengths m from
the star sirius has a surface temperature of 9750 k and aradius 24 times larger than the sunsa what is the ratio of the
a 95-kg fullback is running at 40 ms to the east and isstopped in 075 s by a head-on tackle by a tackler running
a 65kg man is riding on a 22kg cart traveling at a speed of36 ms he jumps off the with zero horizontal speed
an experiment youre designing needs a gas with 160 you recall from your physics class that no individual gas has this
calculate the energy needed to accelerate a spaceship of mass10000 kg to a speed of 3c for intergalactic
the temperature of a plastic cube is monitored while the cube is pushed26 m across a floor at constant speedby a
starting from rest a 53 kg blockslides 21 m down a rough 300degincline the coefficent of kinetic friction between the
suppose 400 g of hydrogen is separatedinto electrons and protons suppose also the protons are placed atthe earths north
a 0470 kg pendulum bob passes through the lowest part of itspath at a speed of 380 msa what is the tension in the
some planetary scientists have suggested that the planet mars has an electric somewhat similar to that of the earth
three uniform spheres are located at the corners of anequilateral triangle each side of the triangle has a length of
the average depthnbsp of oceans is about 4km the oceans cover abou 70 of earths suface make an order of nagnitude
a pump is required to lift 800 kg of water about 210 gallonsper minute from a well 140m deep and eject it with a speed
a tire 20 ft in diameter is placed on a balancing machinewhere it is spun so that its tread is moving at a constant
an 18-year-old runner can complete a 100-km course with an average speed of 449 ms a 50-year-old runner can cover the
a sprinterexplodes out of the starting block with an acceleration of214 ms2 which she sustains for 126 sthen her