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An athlete competing in the hammer throw swings a 4.0 kg hammer on a chain in a horizontal circle with a 5.4 m diameter. At its fastest, the hammer rotates at 124 rpm.
a. What is the tension in the chain attached to the hammer at that speed?
A 15-microF capacitor is connected to a 50-V battery and becomes fully charged, what is the voltage across the capacitor's plates after the slab is inserted
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to five before coming to rest momentarily.
Two physical pendulums ( not simple pendulum) are made from sticks that are suspended from the ceiling at one end. The sticks are uniform and are identical in all respects, except one is made of wood (mass = 0.17 kg )and the other of metal (mass =..
A flight attendant pulls her 63-N flight bag a distance of 277-m along a level airport floor at a constant velocity. The force she exerts is 35N at an angle of 57° above the horizontal. Determine the work completed by the force of friction on flig..
A 54 N crate is suspended from the left end of a plank. The plank weighs 21N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.3m from the left end of the plan..
What is the resultant vector, R, obtained by adding vectors C and D? Express the magnitude to three significant figures. Express the angle to one decimal place.
A train is travelling up a 4.8^circ incline at a speed of 3.25m/s while the last car breaks free and begins to coast without friction.
Assume that it takes 2.30 kg of oxygen to burn 1.00 kg of coal. (The actual amount varies with the type of the coal). What is the total mass of the reagents used in the combustion all through the 30 days.
determine the largest angle MAX that the crutch can have just before it begins to slip on the floor.
The horizontal component Fx is shown by the histogram below as function of position along x-axis. There is also a kinetic frictional force of 0.50 N between mass and surface.
The brick wall of a building has dimensions of by and is thick. How much heat ?ows through the wall a period when the average inside and outside temperatures are, in that order.
What is the charge on A so that the force on B is zero.
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