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A uniform plank of length 4.00 m and weight 350 N rests horizontally on two supports, with 1.00 m of the plank hanging over the right support. A person who weighs 500 N walks on the overhanging part of the plank.
A) if the person is standing at x= 0.30 m to the right of point B, what is the value of the force FA?
B) What is the maximum value of the distance x before the plank begins to tip? Show work.
An electron is acted on by an electric force of 5.1e-14 N. find the magnitude of the electric field at the electron's location
A 280-kg piano slides 4.3 m down a 30o incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
A snake is sunning itself on a rock. If the snake is 0.4 m long, what is the approximate amount of radiation it absorbs from the Sun in 15 min, Estimate the temperature in the Sun on the rock
A fish takes the bait and pulls on the line with a force of 2.3N . The fishing reel, which rotates without friction, is a uniform cylinder of radius 0.060m and mass 0.86kg, What is the angular acceleration of the fishing reel
An automobile tire is inflated with air originally at 20.0°C and normal atmospheric pressure. During the process, the air is compressed to 25.0% of its original volume and the temperature is increased to 35.0°C. (a) What is the tire pressure? (b) Aft..
A river flows at a speed of 12m/s from north to south. A powerboat can move at a constant maximum speed of 23 m/s in still water. find the maximum velocity of the boat traveling upstream
Consider a binary star system in which the two stars have masses M1 and M2 and the stars move on circular orbits separated by a distance R
A 1,800-kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest
Three positive charges are fixed in place. Q 1= +4.0 nC and is located at (0,2), Q2= +1.0 nC and is located at (0,-1), What is the electric potential at the origin
A person of mass 80 kg stands at the center of a rotating merry-go-round platform of radius 3.5 m and moment of inertia 920 kg cdot m^2. The platform rotates without friction with angular velocity 0.85 rad/s. The person walks radially to the edge ..
Assume that an inexpensive watch runs 0.004% slower than a "perfect watch" (viz., a "time standard") that neither loses nor gains time, what would the perfect watch measure for this time interval
A pair of speakers separated by 0.700m is driven by the same oscillator at a frequency of 662Hz. An observer, originally positioned at one of the speakers, begins to walk along a line perpendicular to line joining the speakers. (Assume the speed o..
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