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A lumberjack (mass = 98 kilogram) is standing at rest on one end of a floating log (mass = 245 kilogram) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +3.8 m/s relative to the shore, and then hops onto an identical floating log that is initially at rest. Ignore any friction and resistance between the logs and the water.
(a) Find the velocity of the first log just before the lumberjack jumps off? (Indicate the direction of the velocity by the sign of your answers.)
(b) Find the velocity of the second log if the lumberjack comes to rest on it.
Consider an LR circuit like that displayed in Figure 6.6 in Activity 2-1 in your lab manual. You measure the current through the inductor as a function of time, What is the total resistance of the circuit
q1. when babe ruth hit a homer over the 7.5 -high right-field fence 98 from home plate roughly what was the minimum
Clifford is in a real hurry, however, and skips the speedramp. Starting from rest with an acceleration of 0.39 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. Illustrate what is the speed at which the belt of the ra..
A train slows down as it rounds a sharp horizontal turn, going from 80.0 km/h to 58.0 km/h in the 13.0 s that it takes to round the bend. Compute the acceleration at the moment the train speed reaches 58.0 km/h
A football quarterback is moving straight backward at a speed of 2.0 m/s when he throws a pass to a player 20.0 m straight downfield. How long does it take to get to the receiver
sound travels at a speed of about 344 in air. you see a distant flash of lightning and hear the thunder arrive 7.7
consider a particle with initial velocity u that has a magnitude 12.0 ms and is directed 60.0 degrees above the
A conducting rod of mass m is sliding on frictionless conducting rails in a region that has a static, uniform magnetic field directed into the page as shown. The rails slope downward from the end with the resistor so that the rod of mass m slides dow..
The surface temperature of the Sun is about 5800 K. Taking the Sun's radius to be 6.96E+8 m, calculate the power radiated by the sun
The pilot of an airplane executes a loop-the-loop maneuver in a vertical circle. What is the pilot's apparent weight at the lowest point if his true weight is 160 lb
The nucleus of the hydrogen atom has a radius of about 1.1 x 10-15 m. The electron is at a distance of about 5.2 x 10-11 m from the nucleus. find the volume of the atom
A particular radioactive source produces 175 mrad of 1 MeV gamma rays per hour at a distance of 1.0 meter. Find how long could a person stand at this distance before accumulating an intolerable dose of 1 rem
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