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A 47.1 kilogram girl is standing on a 162 kilogram plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.49 meter per second relative to the ice surface in the direction of the positive x-axis.
Determine the velocity of the plank relative to ice surface?
Find the velocity of the girl relative to the plank?
question starting from its nest an eagle flies at constant speed for 3.2 min due east then 4.6 min due north. from
Two pieces of steel wire with identical cross sections have lengths of L and 3L. The wires are each fixed at both ends and stretched so that the tension in the longer wire is five times greater than that in the shorter wire.
An incandescent light bulb is rated at 100 W when the applied voltage is 120 V. find the resistance of the bulb when it is operating
A 70.0Hz generator with an rms voltage of 165Vis connected in series to a 3.35k ohm resistor and a 2.5uF capacitor, Find the phase angle between the current and the voltage
The pendulum in a grandfather clock is made of brass and keeps perfect time at 15. How much time is gained or lost in a year if the clock is kept at 29
an unknown tuning fork is sounded along w/ a tuning fork whosefrequency is 256Hz and a beat frequency of 3 Hz is heard. What is the frequency of the unkown tuning fork
Two archers shoot arrows in the same direction from the same place with the same initial speeds, but at different angles. how far apart are the two arrows when they land
Sodium ions (Na+) move at 0.841 m/s through a bloodstream in the arm of a person standing neara large magnet. what would be the magnetic force on the arm
you are driving south on a highway at 25 rm ms approximately 55 rm mih in a snowstorm. when you last stopped you
A commuter train blows its horn as it passes a passenger platform at a constant speed of 39.1 m/s. Calculate the wavelength for the receding train
The two vectors (3 m)i − (2m)j and (2 m)i +(3m)j − (2 m)k define aplane. It is the plane of the triangle with both tails at onevertex and each head at one of the other vertices. Give a vector that is perpendicular to the plane?
if the area of the plates of a parallel plate capacitor is halved and the separation between the plates tripled then by
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