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A meterstick is initially balanced on a fulcrum at its midpoint. You have four identical masses. Three of them are placed atop the meterstick at the following locations: 23cm , 46cm , and 98cm.
Where should the fourth mass be placed in order to balance the meterstick?
A wrecking ball (weight = 4800 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3600 N. As support cable runs from the top of the boom to the tractor.
A 60.0-g object is attached to a horizontal spring with a force constant of 15.0 N/m, What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless
A 1000kg car moving 40m/s skids to a stop. During the skid, the only force is the frictional force between the tires and the road, What is the initial kinetic energy of the car
A man throws a grenade from a car that is travelling at 90km/hr and wishes to throw it into a car heading in the same direction at 110km/hr
A 44.20 cm diameter disk rotates with a constant angular acceleration of 2.84 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at t..
The index of refraction for a diamond for red light of wavelength 654 nm is 2.35, Find the angle of refraction for red light
A single slit 1.0mm wide is illuminated by 500nm light. What is the width of the central maximum (in cm) in the diffraction pattern on a screen 4.0m away
One force is 60.0 N along the x-axis, the second is 75.0 N along a direction making a counterclockwise angle of 150.0° with the x-axis. Illustrate what is the magnitude of the third force?
Two coils are close to each other. The first coil carries atime-varying current given by I(t) =(4.7 A)e^-0.023t sin(377t). What is the mutual inductance of the coils
A leather ball of circumference 75.1 cm and mass 583 g is forced to the bottom of a swimming pool and then released. Calculate the buoyant force on the ball
The classroom temperature is 20 C. The relative humidity is 60%. What is the total humidity (kg of H2O vapor) in the room
A woman rides a carnival Ferris wheel at radius 16.0 m, completing 4.40 turns about its horizontal axis every minute. What are (a) period of the motion, and the magnitude of her centripetal acceleration at (b) highest point and (c) lowest point.
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