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A ball of mass m=1.5kg is placed on the platform supported by a spring with k=250 n/m. initial velocity of the ball is 0. find how far down will move the platform. do the same if ball is thrown on the platform with velocity 10 m/s directed downwards.
You are lowering two boxes, one on top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp. What is the magnitude of the friction force on the upper box
Three objects are held in place on three corners of a square, with sides of length 1.10 m. Find the electric potential at the fourth corner of the square
A constant force is applied to an object, causing the object to accelerate at 10 m/s2. What will the acceleration be if the force is halved? What will the acceleration be if the object's mass is halved?
Find the distance between the centers of the spheres.
A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 9.0 m/s. The student throws a ball along a path that she judges to make an initial angle of 54.0° by the horizontal and to be in li..
rate at which mechanical energy is transferred to the turbine blades, assuming 60 percent efficiency.
If an object is placed between two parallel thin plane mirrors, an infinite number of images result. Find the distance of the images formed from the object
You are the technical consultant for an action-adventure film in which a stunt calls for the hero to drop off a 23.7-m tall building and land on the ground safely at a final vertical speed of 3.85 m/s. How many revolutions does the drum make during..
The planet Uranus has a mass about 14 times theEarth's mass, and its radius is equal to about 3.7 Earthradii. find the minimum escape speed from Uranus
A parallel-plate capacitor with C = 13 mu or micro FF is charged so as to contain 1.1 J of energy, what is the energy density (the energy per unit volume)
The magnetic field inside a superconducting solenoid is 5.80 T. The solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. Determine the magnetic energy density in the field
suppose one pendulum consists of a 1-meter string with a bob that is an aluminum sphere 2 inches in diameter. a second
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