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	Golf for 10		2012-04-18
		Bob pose la question : Question from Bob: Hi, I am trying to set up pairings for 4 rounds of golf with only 10 golfers (2 foursomes and 1 twosome) and trying to minimize duplications. Any formulas or help? Victoria West and Harley Weston lui répond.
	Finding Force When Pressure and Area Are Known		2009-06-25
		chris pose la question : i need to calculate the force for a tube. given the follwing data. pressure is 900 PSI Tube is 6 m long by 1.5m Outside Diameter Janice Cotcher lui répond.
	Apparent Weight in salt water		2009-06-06
		Rob pose la question : If an object weighs 100kg in air how much will it weigh when suspended in salt water? Is there an easily used conversion calculation? Janice Cotcher lui répond.
	Unit Conversion for Force and Mass		2009-05-08
		Ray pose la question : Good Day! I was confused about lbm and lbf and slug. I knew that lbm is a unit for mass and lbf is a unit for weight. my problem is some books follow this relationship where lbf=(lbm times the gravitational pull) which is 32.2 ft/(s^2) while other books treat lbm=lbf. other books also treat lbm=(lbf times 32.2)... which is correct? Is 1kg=2.205 lbm or 1kg=2.205lbf? Is 1BTU=778.16 lbf-ft or 1BTU=778.16 lbm-ft? what is the relationship of slug on these two, lbm and lbf? Janice Cotcher lui répond.
	Pressure at Given Depth		2009-02-22
		Tamara pose la question : A sea is 3km deep. The average density of sea water there is 1020 kg/m^3. What is the water pressure at the bottom? Janice Cotcher lui répond.
	A force vector		2008-08-28
		moumita pose la question : |F|=20N...this force is acting along a vector A=4j+3k.what is F? Penny Nom lui répond.
	Two forces acting on a body		2008-06-21
		Rita pose la question : Before answering the question below, what exactly is, in basic words, resultant force? QUESTION: Two forces of 50 and 68 pounds act on a body to produce a resultant force of 70 pounds. Find, to the nearest 10 minutes or nearest tenth of a degree, the angle formed between the resultant force and the smaller force. Harley Weston lui répond.
	Hoisting an anchor		2008-01-10
		ron pose la question : four men on a boat are using a capstan for hoisting an anchor weighing 2000lbs. The diameter of the barrel of the capstan at the section in use is 8in., and the pull on the chain carrying the anchor and passing around the capstan barrel is assumed to act at a distance of 1in. from the surface of the barrel. If the distance from the axis of the barrel to each point at which effort is applied to a capstan bar is 40in., what force must be applied by each man hoisting the anchor? Stephen La Rocque lui répond.
	Forces on an inclined plane		2008-01-10
		Ron pose la question : A body that weighs 540lbs is caused to slide up an inclined plane with a uniform velocity by a force that acts parallel to the plane. For each foot of horizontal distance, there is a vertical rise of 2in. If the coefficient of sliding friction is 0.16, what force is required to move the body? Stephen La Rocque lui répond.
	How do you calculate work when force is negative?		2007-10-02
		Snigdha pose la question : how do you calculate work when force is negative? Stephen La Rocque lui répond.
	The tension in a single strand of wire		2007-08-13
		Gene pose la question : Seeking an equation that calculates the tension in a single strand of wire or rope. Conditions: the wire is fixed at both ends, A known weight is suspended from the center of the span. The weight will dipslace the strand downward some distance Y. Let the distance between the fixed ends be X= 500mm. Weight W=0.5kg. Original tension in the strand is T= 10 newtons.Your help sincerely appreciated. Gabriel Potter and Stephen La Rocque lui répond.
	4 digit lock		2007-05-16
		Kathy pose la question : Hi, My name is Kathy and I'm a REALTOR, I have 2 different lockboxes that I cannot remember the combinations for, so what I need is all the different combinations for 4 digits that cannot be the same, i.e. 0123. Can you help me out? I would hate to throw them away as they cost about $30 each. Thank you, Kathy Stephen La Rocque lui répond.
	A couch sliding off a truck		2007-04-30
		William pose la question : A couch with a mass of 1 X 10^2kg is placed on an adjustable ramp connected to a truck. As one end of the ramp is raised, the couch begins to move downward. If the couch slides down the ramp with an acceleration of .70 meters per second when the ramp angle is 25 degrees, what is the coefficient of kinetic friction between the ramp and couch? I drew a force diagram and if I did it correctly I identified the forces involved as "mg" (mass x gravity), "Fn" (normal force) and the "Ff" (frictional force). I know that we have the couch sliding down the ramp a .70 m/s but I don't think this a force and I'm not sure how this info fits into the problem. I know that the formula for calculating the coefficient of friction is Ff/Fn. Based upon the force diagram I drew and calculated Fn to be 1082N. I can't seem to get past this point. How do I determine what the frictional force is? Stephen La Rocque lui répond.
	Friction of a skier		2007-03-24
		William pose la question : An olympic skier moving at 20.0 m/s down a 30 degree slope encounters a region of wet snow and slides 145m before coming to a halt. What is the coefficient of friction between the skis and the snow? Stephen La Rocque lui répond.
	Rotor-ride		2007-03-07
		Jessie pose la question : In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room". The room radius is 4.6m and the rotation frequency is 0.550 revolutions per second when the floor drops out. What is the minimum coefficient of static friction so that people will not slip down? People on this ride say they were "pressed against the wall". Is there really an outward force pressing them against the wall? If so, what is its source? If not, what is the proper description of their situation (besides scary)? Stephen La Rocque lui répond.
	A person jumps from the roof of a house		2007-02-13
		Jessie pose la question : A person jumps from the roof of a house 3.9m high. When he strikes the ground below, he bends his knees so that the torso decelerates over an approximate distance of 0.70m. If the mass of his torso (excluding legs) is 42kg, find a) his velocity just before his feet strike the ground , and b) the average force exerted on his torso by his legs during deceleration. Please provide calculations and answers for comparison. Stephen La Rocque lui répond.
	The angle between two forces		2005-01-19
		Abraham pose la question : One force of 20 pounds and one force of 15 pounds act on a body at the same point so that the resultant force is 19 pounds. Find, to the nearest degree, the angle between the two original forces. Penny Nom lui répond.
	The combined force of two vectors		2004-10-30
		Brian pose la question : Two teams are playing push ball with a large 8 foot diameter ball. One team exerts a force represented by the vector a = 2i + -5j, and the other team exerts a force represented by the vector b = -8i-3j. 1.Determine the direction of movement of the ball if the i axis is due east. 2.Determine the combined force magnitude. Harley Weston lui répond.
	The force of a 5000 tonne lorry		2004-10-27
		Aaron pose la question : A 50 tonne lorry is parked on a slope with a gradient of 4%. Due to the self weight of the lorry, what is the force * acting down the slope * acting normal (at right angles) to the slope Penny Nom lui répond.
	Levers		1999-01-13
		Lane Campbell pose la question : 1. Solve for x or y. (a) <-----4m------><------4m-----><---------xm ---------> _____________________________________________________ ^ ^ ^ ^ 25N 5N ^ 15N Jack LeSage lui répond.

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