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A homeowner is trying to move a stubborn rock from his yard which has a mass of 1.150 × 103 kg. By using a lever arm (a piece of wooden board) and a fulcrum (or pivot point) the homeowner will have a better chance of moving the rock. The homeowner places the fulcrum 0.288 m from the rock so that one end of the wooden board fits under the rock\'s center of weight. If the homeowner can apply a maximum force of 680.0 N at the other end of the board, what is the minimum total length of board required to move the rock?
L=(__________)m
A 3.00-m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 0.440 m/s. Calculate the magnitude of the induced emf between the ends of the wire. (in µV)
A ball and bat, approaching one another each with the same speed of 1.3 m/s collide. Find the speed of the ball after the collision
Gas flows from a reservoir at 2000 psi pressure into a well at 1 atm pressure, what is the actual volumetric flow in the well
Find out all intermediate results to at least four-digit accuracy to minimize roundoff error. m/s2 direction 3° from the direction of velocity towards center of the circle
How high is the sun above the horizon to a fisherman. What is the coefficient of kinetic friction between tires and pavement.
A torque of 11Nm is applied to a heavy wheel whose moment of inertia is 34 kgm2. What is the angular acceleration of the wheel
A small, plastic sphere of mass m = 111 g is attached to a string There is an electric field of 122 N/C directed along the + x axis
Where can a third charge be placed. To what common temperature must the two pieces be heated in order that the cylinder just fit over the piston.
A block of mass m = 331 g is dragged with a string across a rough horizontal table. The string tension is T = 3.27 N, What is the power supplied by the force of friction
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3, Calculate the weight of the rod, w
A racing car start from rest in the distance and accelerates with a uniform rate of speed 35m/s in 11 sec moving in a circular path of radius 500 m assuming constant tangential acceleration find (1) the tangential acceleration. (2) The centripetal..
Three equal positive point charges of magnitude Q = 6.00? C are located at three corners of a square of edge length d = 2.6 cm. A negative charge -18.00? C is placed on the fourth corner.
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