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A uniform rod of length 0.820 m and mass 13.0 kg is balanced on a sharp edge at 0.660 m from the left end. At the left end hangs a mass of 45.0 kg and the right end hangs an unknown mass so that the whole assembly is in equilibrium.
Calculate the torque on the center of mass of the rod alone with respect to the pivot point.
Calculate the unknown mass.
An electric vehicle starts from rest and accelerates at a rate of 2 m/s2 in a straight line until it reaches a speed of 25.00 m/s. The vehicle then slows at a constant rate of 1.1 m/s2 until it stops. (1) How much time elapses from start to stop? ..
A cart with mass 380 g moving on a frictionless linear air track at an initial speed of 0.9 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision, the first cart continues in its original direction ..
A soccer playrer kicks a 0.5kg ball from rest to a speed of 9m/s during a 0.15s contact between his foot and the ball. What is the average force applied by the players foot during the kick
A rectangular block of ice 12 m on each side and 1.3 m thick floats in sea water. The density of the sea water is 1025-kg/m3. The density of ice is 917 kg/m3. How many penguins of mass 26 kg each can stand on the ice block before they get their fe..
A water tank filled (with water) to the brim has a hole in itsside 30 meters down from the top. The area of the hole is0.08 m^2. Calculate the velocity of the water as it exits the hole
At time zero, an object is thrown upward at a speed of 14.0 m/s from the top of a 91.0 m tall building. What time is it when the object hits the ground
A 40ton rail car and a 80ton rail car, initially at rest, are connected together with a giant but massless compressed spring between them. When released, What is the speed of the 40ton car relative to the ground
An RL series circuit has R = 80.0? and L = 1.95mH . The series combination is connected across a 165V (rms), 63Hz power supply. Find the peak current
Find the frequency of revolution of an electron with an energy of 500 eV in a magnetic field of 41.0 µT. Hz (b) Calculate the radius of the path of this electron if its velocity is perpendicular to the magnetic field. m
a 5.0 kg ball is initially sitting at rest on top of a 48 meter hill. the ball is pushed with a force of 25 n for 3.0 s
a long wire carrying a 5.5 a current perpendicular to the xy-plane intersects the x-axis at x-2.0cm. a second parallel
a magnetic field is oriented at an angle of 37 degrees to the normal of a rectangular area 4.5 cm by 7.0 cm. if the
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