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A ladder 2.30 m long, weighing 226 N, initially lies flat on the ground. The ladder is raised to a vertical position. Compute the work done by the force lifting the ladder. The ladder's center of gravity is at its geometric center.
A 63.5-kg runner has a speed of 5.80 m/s at one instant during a long-distance event. If he doubles his speed to reach the finish line, by what factor does his kinetic energy change
A person with mass m1 = 52 kg stands at the left end of a uniform beam with mass m2 = 109 kg and a length L = 3.1 m. What is the location of the center of mass of the system
You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 31 kg. The rope is at an angle of 30 degrees to the ground. As you pull with a force of 30 N, the sled travels a distance of 45 m.
The centers of a 11.0kg lead ball and a 150g lead ball are separated by 7.00cm. What gravitational force does each exert on the other
Compute the numerical value for acceleration
A beam of 12 cm microwaves strikes a surface glass with an index of 1.5 at an incident angle of 45 degrees. Compute the transmitting angle
An archer shoots an arrow with a velocity of 45m/s at an angle of 50 degrees with the horizontal. An assistant standing on the level ground 150 m downrange from the launch point throws an apple straight up with the least initial speed required to ..
A toy cannon uses a spring to project a 5.31-g soft rubber ball. The spring is originally compressed by 5.04 cm and has a force constant of 7.96 N/m. At what point does the ball have maximum speed
Sam, whose mass is 74 kg, straps on his skis and starts down a 67-m-high, 20 ^\circ frictionless slope. Find Sam's speed at the bottom using work and energy
A steel cable with total length,52 mand mass,130 kgis connected to two poles. Calculate the wavelength of the resulting wave on the cable
A point charge +6.7 uC is placed at the origin, and a second charge -3.6 uC is placed in the X - Y plane at (0.40 m , 0.55 m ). Where should a third charge be placed in the plane so that the net force acting on it is zero? Express your answers usi..
A block hangs from the ceiling by a massless rope. A second block is attached to the first block and hangs below it on another piece of massless rope. Calculate the mass of the top block
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