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a box is sliding with a speed of 450 ms on a horizontal surface when at point p it encounters a rough section on the
a flower pot on a balcony railing falls to the ground 903 m below a cat directly beneath the pot sees it begin to fall
a beam of unpolarised light with a power of 70 mw is passed through two polarisers in series with their polarisation
a galvanometer has an internal resistance of 100 and deflects full-scale at a current of 200 ma what size resistor
a 24 m long rod of mass m1 160 kg is supported on a knife edge at its midpoint a ball of clay of mass m2 48 kg is
a fortune tellers crystal ball actually just glass is 13 cm in diameter her secret ring is placed 8 cm from the edge of
a beam of unpolarized sunlight strikes the vertical plastic wall of a water tank at an unknown angle some of the light
a person with a mass of 80kg stands on two snowshoes with areas of 2500cm3 each what is the total pressure on the
an aluminum rod is 210 cm long at 20degc and has a mass of 350 g if 15000 j of energy is added to the rod by heat what
water flows through a pipe the radius of the pipe in the narrow part is 2m and the radius of the pipe in the wider part
an aquarium contains a 5-cm layer of water n1333 floating on top of carbon tetrachloride if the angle of incidence into
a circular window with 05m radius on a submarine can withstand a maximum pressure of 8900 nm2 how deep can the sub
an ideal gas is enclosed in the container with dimensions 5m x 3m x 2m the pressure in the gas is 2 atm1 atm 1013 kpa
a square coil of wire with 15 turns and an area of 040 m2 is placed parallel to a magnetic field of 075 t the coil is
a bicycle wheel of radius 20 cm is mounted at the middle of an axle 43 cm long the tire and rim weigh 24 n the wheel is
josh starts his sled at the top of a 30 m high hill that has a constant slope of 25deg after reaching the bottom he
on an air track a 400 g glider moving to the right at 200 ms collides elastically with a 500 g glider moving in the
a person pushes a 10 kg box from rest and accelerates it to a speed of 32 ms with a constant force if the box is pushed
two disks of identical mass but different radii r and 2r are spinning on frictionless bearings at the same angular
your digital camera has a lens with a 50 mm focal length and a sensor array that measures 482 mm x 364 mm suppose youre
a dock worker applies a constant horizontal force of 805 n to a block of ice on a smooth horizontal floor the
during an etiquette class you walk slowly and steadily at 020 rm ms for 25 rm m with a 075 rm kg book balanced on top
an 900 rm kg point mass and a 150 rm kg point mass are held in place 500 rm cm apart a particle of mass m is released
a 2530 rm kg satellite used in a cellular telephone network is in a circular orbit at a height of 710 rm km above the
a batted baseball leaves the bat at an angle of 340 degrees above the horizontal and is caught by an outfielder 370