A person carries a 50 kg object up a flight of stairs. There are ten stairs; each step is 30 cm high and 30 cm deep. How much work is done to carry the object to the top of the stairs?

A 22kg crate is at rest on a ramp with an incline of 25 degrees. There is a coefficient of kinetic friction between the ramp and crate of 0.29. A force is applied to pull the crate up the incline at a constant speed. What is the work done by this force to pull the crate a distance L=2.45m up the ramp?

A box with with a mass m = 2kg is being pushed up a ramp by an unknown pushing force Fp. The coefficient of static friction between the box and interface is 0.7. The coefficient of kinetic friction between the box and interface is 0.6. The incline of the ramp is 15 degrees. The velocity of the box is constant. The surface of the ramp is 12 m.  What is the work done by normal force while the box is being pushed the entire length of the ramp? [ I think that it is 0 N, since the x component of normal force which is parallel to motion is 0. Is that correct?]

A man pulls a sled a distance of 231 m. The rope attached to the sled makes an angle of 30.0° with the ground. The man exerts a force of 775 N on the rope. How much work does the man do to pull the sled?

A man pulls a 4.6-kg sled 50 meters along an angled hill with a force of 36 N, which elevates the man 28 meters above the bottom of the hill. The man then hops on his sled and slides from rest to the bottom of the hill back along his 50 meter path, during which a 299 N frictional force acts upon his sled. How much work in Joules does the man do against friction in pulling the sled up the hill?

A 70 kg person climbs a 2.0 m high flight of stairs within 8 seconds when he walks and 2 seconds when he runs up the stairs. What is the work done by the person as he runs up the stairs280 J560 J1372 J10976 J

A block of mass ?=0.350kg is released from rest, from a curved ramp of height h= 42.0 cm (point A in the figure). The block slides down frictionless to the bottom of the ramp to point B. a) What is work done by gravity when the block moves from A to B? b) What is the speed of the block at the bottom of the ramps (point B in the figure)? c) The box continuesto slide frictionless and compress a spring a distance Δ?=8.20cm until it stops at point C. What is the spring constant k of the spring? d)What is the elastic potential energy stored in the spring when the block is at point C?

Do the following situations result in positive work, negative work, or zero work? Force is perpendicular to displacement. A force slows an object down. Force acts in the same direction as displacement. Force acts in the opposite direction of displacement. A force acts on an object that remains stationary.

A 600 N person climbs a ladder at a constant speed. The person climbs up 12 meters in a time of 20 seconds. What is the work done and the power exerted?

An object slides on an inclined plane that has a slope of 30 degrees. The height of one end of the inclined plane relative to the other end is 2.0 m. The mass of the object is 2.5 kg and the coefficient of kinetic friction between the object and the plane is 0.2. How much work is done by the force of gravity when an object moves from the top to the bottom of an inclined plane?