HW09 - Work and Kinetic Energy

A uniform chain 24 m long and with mass 26 kg is hanging from the top of a building 24 m high. If a bucket filled with cement of mass 55 kg is attached to the end of the chain, how much work is required to pull the bucket and chain to the top of the building? (Use g = 9.8 N/kg.) (Use decimal notation. Give your answer to one decimal place.) J

11. The work W done by a force F in moving an object along a displacement vector d is given by W = F · d. a. Find the work done in moving a 5-lb textbook 4 feet up. In this setting, F = (0,5) and d = (0,4). b. Find the work done in moving a box 3 feet across a table using force F = (4,–1) and d = Notice that the vertical component (- 1j) of the force had no effect on the work done since we %3D %3D only displaced the object in the horizontal direction. Find the work done in moving an object from position (0, 2) to position (5, 3) using force F = (3,3). С.

kindly provide FBD

A 50 kg mass that weighs 490 Newtons is pushed up a 20m lone ramp that is 2m high. (h). The force required to push the block up the ramp is 49 Newtons. Assume the ramp is frictionless. Don’t confuse mass with weight. Weight is a force and is equal to mg. How much work is done in sliding the block from the bottom of the ramp to the top?     Show calculations. Work=Force(f) *Displacement (d) =49*20 =980 J     2. How much work would be done in lifting the mass straight up 2.0 m(h)? Show calculations. See (Videos above for help).   If the block slides down from the top of the ramp to the bottom, how much kinetic energy will the block have at the bottom of the ramp? Assume the ramp is frictionless.   Calculate the velocity of the block when it reaches the bottom of the ramp. (mgh=1/2mv2)   If the block is dropped from the top of the ramp and falls straight down to the ground, how much kinetic energy will it have at the moment it strikes the ground? Note: many students will answer…

Calculate the work done in lifting a 520-NN barbell 1.8 mm above the floor. Express your answer to two significant figures and include the appropriate units. What is the gain of potential energy of the barbell when it is lifted to this height? Express your answer to two significant figures and include the appropriate units.

Can someone help me with this and answer using Pi units if they have to?

STO 1. An object in a horizontal surface was moved by applying a constant force (in Newtons), F = 8î + 5ĵ. If the object was displaced 9 m to the right, determine a. The work done by the applied force on the object. (Ans: 72.0 J) b. The angle at which the force is applied. (Ans: 32.0°)

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Hello, need help with this problem. I got 706N but I'm not sure if that is the right answer.  Here is my work:   Weight of the crate = 120(9.8) = 1176 F = 0.6(1176) F = 705.6 N

Calculate the work done by an applied force of 70.0 N on a crate for the following. (Include the sign of the value in your answer.) (a) The force is exerted horizontally while pushing the crate 4.90 m._____ J(b) The force is exerted at an angle of 32.0° above the horizontal while pushing it 4.90 m.___ J

Please answer the following question(s): 1. (a) What is the average useful power output of a person who does 7.0000 x10 J of useful work in 7.0000 hr? P= (b) Working at this rate, how long will it take this person to lift 2100.0000 kg of bricks up a 1.5000-m platform? Hint: Work done to lift his body can be omitted because it is not considered useful output here. t= Search Submit Answer see other options - If you don't want to answer the question right now View Forum Activities (0 new of 0) Powered by CogBooks f6 1- W f7 ♫+ fg Answering the question(s) helps us recommend your next activity. 99+ O fg বিব f10 f11 DDI f12 {9} h

A sled loaded with firewood is pulled by a tractor. The tractor exerts a constant force with magnitude 2000 N in the horizontal direction. The total weight of the sled and the firewood is 4000 N, and the coefficient of kinetic friction between the sled and the road is 0.200. If the sled travels a distance of 17.4 m, calculate the net work done on the sled. Maintain standard units. Exponential format and 3 SF

1 Determining the force of ?? (0.5 work, 1 answer, 0.5 units) 2  Determining the force of ?? (0.5 work, 1 answer, 0.5 units)

The force on a particle is directed along an x axis and given by F = Fo(x/xo - 1) where x is in meters and F is in Newtons. If Fo = 1.5 N and x = 5.8 m, find the work done by the force in moving the particle from x = 0 to x = 2x m. Number i Use correct number of significant digits. The tolerance is ± 1 in the 2nd significant digit. Units Assistance Used

A chain 67 meters long whose mass is 28 kilograms is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the top 5 meters of the chain to the top of the building? Use that the acceleration due to gravity is 9.8 meters per second squared. Your answer must include the correct units.Work =

A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use g = 10 m/s². Match the answers with questions. Question the work done on the box by its weight (WW) the work done on the box by the tension force in the cable (WT) the net work done on the box (Wnet) All Answer Choices A. 320 J B. 50 J C.OJ D. -50 J E. -320 J Selected Match

A chain 62 meters long whose mass is 21 kilograms is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the top 11 meters of the chain to the top of the building? Use that the acceleration due to gravity is 9.8 meters per second squared. Your answer must include the correct help (units). Work =

please help with this question

A heavy rope, 50 ft long, weighs 0.3 lb/ft and hangs over the edge of a building 140 ft high. (a) How much work W is done in pulling the rope to the top of the building? W = ft-lb (b) How much work W is done in pulling half the rope to the top of the building? W = ft-lb

A chain of length 11 m and a mass per unit length of 0.6 kg/m initially lies coiled on the ground. Find the work done (in Joules) in raising one end of the chain to a height 15 m above the ground. Use g = 9.81 m/s² for the acceleration due to gravity. Write only the numerical answer in the box below. Do not include the units. To be graded correct, your answer must be correct to three significant digits. This question accepts numbers or formulas. Plot | Help | Switch to Equation Editor | Preview

Gravity does 343343 J of work while a bowling ball rolls down a hill. If the final kinetic energy of the ball was 422422 J, what would be the value of the initial kinetic energy of the bowling ball?

A block of mass m = 3.1 kg is placed on a rough incline surface making an angle e = 13.5. with horizontal. A force F parallel to the ground is applied to the block. Due to the applied force the block moved x = 1.2 meter along the inclined surface with constant speed. If the inclined surface has kinetic friction coeficient µk = 0.29 what is the work done by the applied force? Provide your answer with 2 decimal places. Take g = 9.81 m/s² m

P1. 29. Determine the work done in moving an object along a vector a 5i - 3j + 2k if the applied force is F - 2i -j -k. Select one: а. 9 O b.5 О с. 2 O d. 3 Clear my choice

Calculate the work done by an applied force of 71.0 N on a crate for the following. (Include the sign of the value in your answer.) (a) The force is exerted horizontally while pushing the crate 5.70 m. J(b) The force is exerted at an angle of 26.0° above the horizontal while pushing it 5.70 m.

A worker pushes a 30kg crate along a 53degree incline, with respect to the horizontal. The worker pushes it at a distance of 4.5m with a force of 307.36N. The work done by friction on the crate is -130.43J. What is the total work done on the crate? (round your answer to nearest whole number) Your answer