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A delinquent is able to accelerate a 200 g snowball from rest to a speed of 20 m/s over a distance of 1.2 m. What is the work (in J) done on the ball by this troubled youth? You may assume that the snowball travels perfectly horizontally (i.e., parallel to the ground) during its acceleration
Two boxes of masses m1 = 20.0 kg and m2=40.0 kg are connected by a rope through a pulley that has a uniform wheel of mass M=10.0 kg
A puck with mass 0.28 kilogram moves in a circle at the end of a string on a frictionless table, with radius 0.75 meter. Find what is the new angular velocity of the puck
string under a tension of 50.5 N is used to whirl a rock in a horizontal circle of radius 2.55 m at a speed of 20.3 m/s on a frictionless surface, What is the breaking strength, in newtons, of the string
10 kg of water at 20 degrees c converted to ice at -10 degrees c by being put in contact with a reservoir at -10
What is the total of the daily increases in time - what is the length of the fiber?
The electric field at the place where a 4 C charge is located is 100 N/C. What is the electrical force acting on the charge
a 15 m long string of mass 1.8 kg is streched such that the tension in the string is 25 n. a wave of frequency 20 hz is
you suspect that an unknown is acetanilide mp 113.5-114oc. give a qualitative estimation of the melting point when the
A concave mirror of radius of curvature of 25 centimeters forms an image of an object that is twice the height of the object. What are the object distances
In the Bohr theory of the hydrogen atom, an electron,oves in a circular orbit about a proton, where the radius of the orbit is 9.51 A. find the electrostatic force between the two
A solid sphere of uniform density starts from rest and rolls without slipping down an inclined plane with angle θ = 30o. The sphere has mass M = 8 kg and radius R = 0.19 m . The coefficient of static friction between the sphere and the plane is μ = 0..
You see the boy next door trying to push a crate down the sidewalk. He can barely keep it moving, and his feet occasionally slip. Estimate the mass of the crate
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