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A 2 kg block is pulled by the rope on the horizontal surface by a 3N force. The coefficient of the static friction (?s) equals 0.3. Calculate the force of static friction acting on the block?
Two carts of equal mass, m = 0.280 kg, are placed on a frictionless track that has a light spring of force constant k = 47.6 N/m attached to one end of it, Find the magnitude of the velocity of the blue cart just after the first collision
When the displacement of a mass on a spring is 0.689 of the amplitude of its oscillation, what fraction of the mass's energy is kinetic energy
For a very simple model, consider a solid iron sphere 2.00 cm in radius. Assume the temperature is always uniform throughout its volume. Find the energy of one photon
A boy kicks a football with an initial velocity of 28.0 m/s at an angle of 30.0 degrees above the horizontal. What is the highest elevation reached by the football
In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 3.0 m/s, what minimum initial speed did the player need to give the puck in order for it to reach the teammate
A grating has exactly 7800 lines uniformly spaced over 2.63 cm, What is the expected angle for the third-order maximum of the green line
A loudspeaker of mass 25 is suspended a distance of = 1.60 below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of = 3.30.
A child in a boat throws a 5.45-kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest
A rod is initially at a uniform temperature of 0 o C throughout. One end is kept at 0oC , and the other is brought into contact with a steam bath at 100 o C.
The wing of an airplane has an average cross-sectional area of 11 m2 and experiences a lift force of 86,000 N. What is the average difference in the air pressure
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 15.0 , giving it a charge of -12.0. Find the electric field just outside the paint layer
At this point, person doing the laundry opens the lid, and a safety switch turns off the washer. The tub smoothly slows to rest in 11-s. Through how many revolutions does the tub turn while it is in motion.
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