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A block of ice weighs 100 N. You can lift the block vertically a distance of 2 m. You can also push the same block up a ramp that is 4 m long. How much work is done in each case? What is the increase in the block's gravitational potential energy in each case? Comment on whether you would lift the block vertically or use the ramp and why
Purchase new automated equipment that will change the proportion between variable and fixed costs to 40% variable and 60% fixed. Determine the selling price per unit. Calculate the break-even point in dollars for 2011.
A 180 g block on a 49 cm-long string swings in a circle on a horizontal, frictionless table at 74 rpm.
A diving board of length 3{rm m} is supported at a point 1 {rm m} from the end, and a diver weighing 550 {rm N} stands at the free end. The diving board is of uniform cross section and weighs 295 {rm N}. Find out the magnitude of the force at the ..
A grinding wheel of radius 0.35 m rotating on a frictionless axle is brought to rest by applying a constant friction force tangential to its rim. The constant torque produced by this force is 75N · m. Find the magnitude of the friction force.
Mattwe pulls his little sister sarah in a sled on an icy surface, with a force of 60 N at an angle of 37 ° upward from the horizontal. If he pulls her a distance of 12m, then determine the work done by matthew?
A coin placed on a turntable rotating at 34.1 rev/min will stay there if its center is placed no further than 10.0 cm from the axis of rotation, What is the coefficient of friction between the coin and turntable
What is change in the car's kinetic energy KEf - KEo from A to B. How fast will the father be moving.
Assume a volleyball player claims a hang time of 1.25 seconds. Then that player must be able to jump a vertical distance of what.
If the backpack begins to slide when the spring ( = 150 ) stretches by 2.40 , what is the coefficient of static friction between backpack and table.
Expalin by how much does the potential energy of a 18.0-kg child increase when the child climbs a normal staircase to the second floor?
A person is making homemade ice cream. She exerts a force of magnitude 22 N on the free end of the crank handle, and this end moves in a circular path of radius 0.28 m. The force is always applied parallel to the motion of the handle. If the handl..
A cube of ice is taken from the freezer at -8.0 and placed in a 113 aluminium calorimeter filled with 306 of water at room temperature of 20.0. The final situation is observed to be all water at 15.0.
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