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## If you want to lift a 20-kg box off the floor to a height of 0.5 meters ...

If you want to lift a 20-kg box off the floor to a height of 0.5 meters how much work ... How much work will it take to lift a 2-kg pair of hiking boots 2 meters off the ...

## how much work is being done if a 100 N box is lifted 3 meters off

www.jiskha.com/search/index.cgi?query=how much work is being done if a 100 N box is lifted 3 meters off the ground?

A 5.o kg box is lifted to a height of 10 meters at a constant speed. a)How much ... How much work is done on a 30 N rock that is lifted 1.5 m off the ground? show work. .... I found that 353N is the maximum force you can apply to box 1 so that box 2 ... a 20-kg box across the floor with constant speed. μs is 0.60, how much work .....

## Work Done against Gravity - CPO Science

www.cposcience.com/home/portals/2/media/post_sale_content/pfc/ancillaries/u2/u2_skill_and_practice_sheets/pfc_u2_ss.pdf

height because only the vertical distance an object moves matters for ... If you have to lift a new sofa to a second-floor apartment, the work done ... Elijah does 44 joules of work against gravity to pull a 0.5-kilogram rope with a ..... A lever used to lift a heavy box has an input arm of 4 meters and an output arm of 0.8 meters.

## Work and Energy Review - with Answers #2 - The Physics Classroom

www.physicsclassroom.com/reviews/energy/energyans2.cfm

A 1200 kg car and a 2400 kg car are lifted to the same height at a constant ... How much work does he do on the box while walking across the floor at constant speed? ... kinetic energy is directly related to the square of the speed (KE=0.5*m* v<sup>2</sup>). ... off a diving board that is elevated to a height of 10 meters above the water.

## Work and Power

tuhsphysics.ttsd.k12.or.us/Tutorial/Lessons/wknpwr/phy.htm

If you think about it, it is the same equation that you use even when an object is ... s=5m and F=20N just like in the previous problem, but this time q =60<sup>o</sup> ... Work: A 50-kg crate is pulled 40m along a horizontal floor by a constant force ... Cos(90<sup>o</sup>) =0 ... power rating of a motor that can lift a 600 Kg load 30 meters in 5 seconds?

## Work and Direction

www.dallassd.com/our schools/high school/chemsite/physics/physicsnotes/p6work_energy.pdf

the box's direction. Fighting against the force of gravity. Work and Direction ... 2. Vertical vs. Horizontal Work. Lifting. Gives an object. Potential Energy of ... 5. A rocket travels at a constant speed through space. How much work is ... 0 =Fv-mg. Fv = mg = (15.0 kg)(9.80 m/s2). Fv = 147 N. Whiker = Fd = (147 ... The floor has a...

## (a) (b) Who is doing more work? - profpaz.com

www.profpaz.com/Files/physci/Chap_04.pdf

if the object is moved 50 m? F= d= W= 2. 650 J of work is done in moving a desk a horizontal distance of 5 m. ... How much work is done in lifting a 10 kg box 1.5 m off the floor? 2 ... A force of 150 N is used to push a motorcycle 10 m along a road in 20 s. ... A crane uses 750 kW of power to lift a car 0.5 m in 12 seconds.

## 7. Kinetic Energy and Work Kinetic Energy - Physics

www.physics.ohio-state.edu/~gan/teaching/spring99/C7.pdf

If a bowling ball and a ping pong ball have the same velocity, the bowling ... If we drop a 3-kg ball from a height of h = 10 m, ... Work: Work is the energy transferred to or from an object by mean of a force ... Consider a box being dragged a distance d across ... The total work done by many forces acting on .... −3⋅9.8⋅5 = 0.

## Mechanical Energy - Physics

physics.weber.edu/schroeder/EEE/chapter2.pdf

gravitational energy as if you lift it only one foot, because of the greater height. ... The official unit of weight, or of any other force, is much less familiar: it is called. 1 ... For example, lifting a single brick two meters off the ground takes ... (0.15 kg)( 20 m/s)2 = 30 kg·m2 s2 . (2.10). Numerically, the kinetic energy is 30, ...

## Momentum, Work and Energy - Galileo and Einstein

galileoandeinstein.physics.virginia.edu/lectures/momentum.html

Nov 29, 2007 ... A 5 kg medicine ball is thrown directly at her by someone standing in front ... a speed of 0.5 meters per second, so the final momentum is 0.5x50 = 25, ... If you lift up a box of books from the floor and put it on a shelf, you've done ... It's obvious that you will have to do twice as much work to raise a box o...

### Work and Energy Notes - District 196

www.district196.org

When you lift a box up off the floor, you must exert a force at least equal to ... Kinetic Energy is produced when a net force does work on the object ... For example, if a 0.5 kg ball is travelling at 10 m/s, then it has ... Equation for PE: PE = mass x acceleration due to gravity x height above the ground ... How much work is done?

### The work-energy theorem states that the work done on - Northern ...

www.northernhighlands.org

If work is the only means to move energy into or out of our system than it will be true ... room at a constant velocity and put it on a shelf at the same height. .... Lifting the box off the floor requires you to supply a force at least equal to its .... On Planet X a 0.5 kg space rock falls a distance of 2.5 meters and looses 20 J of ...

### Physics Homework Help: Work, Power - Physics 24/7

www.physics247.com

Only the component of the force parallel to the motion does work. ... if a rope is tied to a box and the box is pulled horizontally along a floor, some ... How much work was done on the text book? ... ANSWER: None, since F = 0, W = 0. ... frictionless coasters is pushed 5 m along a ramp that makes an angle of 20º to the ground.