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a 60kg girl is standing on a frictionless skateboard what isthe magnitude of the force exerted on the girl by the
a 25g object moving to the right at 20 cms overtakes andcollides elastically with a 100g object moving in the
a ski starts from rest and slides down a 29deg incline 100 mlong use energy methodsa if the coefficient of friction is
high-speed stroboscopic photographs show that the head of a200-g golf club is traveling at 55ms just before it strikes
a system of two paint buckets connected by a light weight rope isreleased from rest with the 120-kg bucket 200m above
the work required to stretch a certain spring from anelongation of 4cm to 5cm is 305j what is the work required to
a baseball player dives into third base with an initial speed of815 ms if the coefficient ofkinetic friction between
a 10 gauge bare wire 26 mm in diameter can carry a currentof 51 a without overheating for thiscurrent what is the
most of us know intuitively that ina head-on collision between a large dump truck and a subcompactcar you are better
an airplane flies in a loop a circlar path in a verticalplane of radius 150m the pilots head always points toward
a motercycle has a mass or 250102 kg a constantforce is excerted on it for 600s the motercycles initialvelocity is
in the old west a marshal riding on a train traveling 50 ms seesa duel between two men standing on the earth 50 m apart
when 1g of natural gas is burned in a stove about 56kj ofheat is produced how much mass is lost in the process can this
original problem a person walks at constant speedv1 along a straight line from a to b and then back alongthe line from
a student makes a short electromagnet by winding 160 turns of wire around a wooden cylinder ofdiameter d 40 cm the
emilie wishes to fly to phun city a place where physics geeksrule the land loacted 800 km n of her present postion her
a cart of a mass 300 kg is pushed up a track at an angle of44 degrees from the bottom to a position that is 30m higher
a 30 kg girl whos running at 3 ms jumps on a stationary 10 kg sled on a frozen lake how fast does the sledwith the girl
a 54 kg ice skater is moving at 39 ms when she grabs theloose end of a rope the opposite end of which is tied to apole
an archer shoots an arrow toward a 300g target that is sliding in her direction at a speed of 250 ms on a smooth
a fighter pilot dives his plane toward the ground at400 ms he pulls out of the dive on a vertical circle what is the
a certain molecule is made up of four atoms three of themhave mass m and are located at the vertices of an
a certain laser outputs pure blue light photon energy 31 ev with power 400 milliwatts 04watts how many photons per
a bead of mass m acted upon by a uniform graviational forcecan slide freely on a frictionless circular hoop of radius r
a 4 kg box is raised from rest adistance of 6 m by a vertical force of110 na find the work done by the forceb find the