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
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...
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
same velocity, the bowling ball has much ... 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 acting on the ... Consider a box being dragged a distance d across a
frictionless floor: ... other form of energy to change, e. g. we can .... −3⋅9.8⋅5 = 0.
Applying Newton's Second Law of Motion, a 200 kg object will have a weight of ...
You are standing on a bathroom scale in an elevator and wish to calculate what
... the 10th floor. 5. A constant force of 600 N is applied straight up on a 50 kg
crate. ... If 40 kN of friction opposes the plane, how much time it will take the plane
How much more work do you do by lifting the box 11.4 meters off the ground ... In
which direction should you apply a force if you want to do the greatest amount of
work? ... 112 joules, 47.6 joules, 0, 34.8 joules, 533022 joules ... Your mass is 49
kg. ... (a) If it takes crane A 9.8 seconds to lift a certain load, how much time does
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...
How much work did the movers do (horizontally) pushing a 150-kg crate 12.3 m
across a rough floor without acceleration, if the effective coefficient of friction was
... A car does 7.0x10<sup>4</sup> J of work in traveling 2.8 km at a constant speed. ... A
hammerhead with a mass of 2.0 kg is allowed to fall onto a nail from a height of .
40 m .
If an object of mass m at the height h falls, the amount of work done by gravity on
... (a) A horizontal force of 100 N is used to push a 20-kg box across ... of a toy
train can lift an elevator as high as we like. ... The same motor can do 250 J of
work in 0.5 s, .... Have you ever wondered how much force a hammer exerts on a
Feb 17, 2015 ... If you have to lift a new sofa to a second floor A box is dragged across a ... named
Solve : Andy and Bryan each lift a 150 kg barbell at a height of 1.5 a. .... A porter
pulls a 10kg luggage along a level road for 5 m by exerting a force of 20N at an ...
5 meters. How much work does he do in a.) pulling b.) lifting c.