A 140-lb man carries a 5-lb can of paint up a helical staircase that encircles a silo with radius 20 ft. If the silo is 80 ft high and the man makes exactly two complete revolutions, how much work is done by the man against gravity in climbing to the top? X ft-lbs Need Help? Read It Watch It

Determine the magnitude of the force that you need to exert on the end of the stick (perpendicular to it) so that the cylinder moves with a constant speed. Determine the work done by your hand on the stick while your hand makes one full turn around the axis. Determine the work done by the stick on the cylinder during the one full term around the axis.

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Circular Motion A 1 Kg bead is confined to move on a vertical circle of radius 2 meters. There is no friction between the bead and the circular track. The bead has a speed of 10 m/s when at the top of the circle at point "A", and the total mechanical energy of the bead is assumed to be constant as it moves around the circle. Assume it takes the bead 0.62 seconds to go counter-clockwise from point "A" to point "B" each cycle. 10 m/s 2 m Previous A 30° Note: vector directions should be given as the "standard" angle with 0 ≤0 < 360 degrees Calculate the direction of the velocity of the bead at point "B". Enter the standard angle in degrees.

4. Two wheels (A and B) of equal mass and the same Iz roll down a hill without sliding and have the same kinetic energy.  Partway down the hill, wheel B stops rolling and continues down the hill sliding (no rotation), but maintains the same kinetic energy as wheel A which continues to roll without sliding.  Which wheel reaches the base of the hill first (assuming they travel the same path length)? wheel A (the one that rolls the whole way) wheel B (the one that starts sliding) they reach the hill base at the same time

Circular Motion A 1 Kg bead is confined to move on a vertical circle of radius 2 meters. There is no friction between the bead and the circular track. The bead has a speed of 10 m/s when at the top of the circle at point "A", and the total mechanical energy of the bead is assumed to be constant as it moves around the circle. Assume it takes the bead 0.62 seconds to go counter-clockwise from point "A" to point "B" each cycle. 10 m/s 2 m 30° Note: vector directions should be given as the "standard" angle with 0≤0 < 360 degrees Calculate the average speed (m/s) from "A" to "B" (based on the 0.62 seconds mentioned in the description).

11. T or F Specific mechanical energy is constant for a given orbit and only depends upon the size of the orbit (semi-major axis, or a).

To make butter in the old days you would need to spin a handle that was attached to a mixer around in a circle. How much power is generated in 1 hour is a 75N force is applied and the handle has a radius of 60cm?

Someone is stuck at the top of a tower, and is very thirsty. A heroic dog, weighing 40lbs, carries a bucket of water, weighing 5 lbs, up a helical staircase that encircles a tower with a radius of 15ft. The tower is 60ft high and the dog makes exactly three complete revolutions climbing to the top. Unfortunately the bucket leaks water at a steady rate, and during the ascent, 1lb of water leaks out. How much work is done by the dog against gravity?

A car rounds a freeway exit turn of radius 40m at constant speed of 20m/s. The turn goes 3/4 around(not a full circle). How much work is done by the friction force on the car’s tires that allows it to turn?