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a boat heads directly across a river its speed relative to the water is 3 ms it takes it 539 seconds to cross but it
a 6000-kg truck is accelerating at 05 ms2 up a slope of 5 degrees if the opposing forces due to road friction and air
two students are on a balcony 192 m above the street one student throws a ball vertically downward at 149 ms at the
a charge -11 times 10-5 c is xed on the x-axis at 9 m and a charge 8 times 10-6 c is xed on the y-axis at 4 mcalculate
a point source emits 27 w of sound a small microphone intercepts the sound in an area of 063 cm2 289 m from the source
a bus accelerates at 15 mss from rest for 12s it then travels at constant speed for 25s after which it slows to a stop
a point source of source emits a tone with a power of 45 w that has a frequency of 429 hz it emits this tone into air
a 310 kg child runs with a speed of 300 ms tangential to the rim of a stationary merry-go-round the merry-go-round has
at rest a person has a metabolic rate of 42 x 105 jhr the person is submerged neck-deep into a tub containing 10 x 103
a pump is needed to lift 750 l of water per minute a distance of 250 m what power in kw must the pump be able to
fairgoers ride a ferris wheel with a radius of 500 m the bottom of which is 175 m above the ground the wheel completes
a car starts from rest at a stop sign it accelerates at 40 ms2 for 6 seconds coasts for 3 s and then slows down at a
a woman stands on a scale in a moving elevator her mass is 505 kg and the combined mass of the elevator and scale is an
you have the urge to connect to nature and become a hunter who uses a slingshot you make a slingshot from a 50cm long
a hammer strikes one end of a thick steel rail of a length 850 m a microphone located at the opposite end of the tail
an 63 kg weight watcher wishes to climb a mountain to work o the equivalent of a large piece of chocolate cake rated at
in this simulation you can choose between seven possible circuits by clicking on one of the small circuit diagrams
a cube of mass m 755 kg is placed on an inclined plane of mass m 1267 kg which makes an angle a 5240deg with the
a volleyball is spiked so that it has an initial velocity of 14 ms directed downward at an angle of 45 degrees below
suppose you loft a ball in a tennis game with an initial speed of 165 ms at an angle of 520 degrees above the
a uniform electric field of magnitude 415 nc pointing in the positive x-direction acts on an electron which is
a car traveling at 86 kmh strikes a tree the front end of the car compresses and the driver comes to rest after
a joggers internal energy changes because he performs 610 105 j of work and gives off 49 multiplied by 105 j of heat
an object of mass m 60 kg hangs from a cord around a light pulley the length of the cord between point p and the
two forces f1 and f2 act a body of mass m onif m50 kgf130 n and f240 n find the vector of acceleration of the