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A 60 g puck is shot across the ice. The initial velocity of the puck is 20m/s. It comes to a stop after travelling 68.0m.
a) Calculate the change in kinetic energy of the puck)
b) Calculate the work done by the force of friction
c) Calculate the force of friction
d) Calculate the coefficient of friction
an air puck bounces back and forth between two parallel walls always traveling perpendicular to the walls. each time
An 84.9-kg wrecking ball hangs from a uniform heavy-duty chain having a mass of 25.2kg. What is the tension at a point three-fourths of the way up from the bottom of the chain
An astronomer observes electromagnetic waves emitted by oxygen atoms in a distant galaxy that have a frequency of 5.710 × 1014 Hz. Determine the relative velocity of the galaxy with respect to the astronomer on the earth
A 20kg loudspeaker is suspended 2.0m below the ceiling twocables that are each 30 degrees from vertical. What is the tension in the cables.
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet
What is the frequency of the train whistle tone, heard by the switchman, in SI units?
a rock is tossed off the top of a cliff of height 34.5m. its initial speed is 29.1m/s and the launch angle is 30.2degrees with respect to the horizontal. what is the speed with which the rock hits the ground
An astronomical telescope uses an objective of power +1.280 D. If the length of the telescope is 80 centimeter, Determine power of the eyepiece
A 545 × 10-6 F capacitor is discharged through a resistor, whereby its potential difference decreases from its initial value of 85.9 V to 28.1 V in 4.49 s. Find the resistance of the resistor.
A perpetuum mobile (latin for "perpetuum motion machine") is an apparatus capable of doing work without supply of energy.
A 4.0g mass is attatched to a wire of diameter 0.64mmwith a full stretched of 0.60mm which is 1/5000 of the originallength. Determine the tensile stress and strain
A 2.0-cm wide diffraction grating has 1000 slits. It is illuminated by light of wavelength 530nm. What are the angles of the first two diffraction orders?
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