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A sled with mass 8.00 kilogram moves in a straight line on a frictionless horizontal surface. At one point in its path, its speed is 4.00 m/s; after it has traveled 2.5 meter beyond this point, its speed is 6.00 m/s. Use the work-energy theorem to compute the force acting on the sled, assuming that this force is constant and that it acts in the direction of the sled's motion.
A basketball can be modeled as a thin walled spherical shell with a mass of 0.600 kg and a radius of 12.0 cm. What is the rotational kinetic energy of the ball
A solid disk of radius 9.20cm and mass 1.15kg , which is rolling at a speed of 2.30m/s , begins rolling without slipping up a 12.0? slope
the space shuttle takes off from cape canaveral in florida and orbits earth 17 times before landing back at cape
according to the lorentz transformation equations what are the x and t coordinates of this event as observed in the
To strengthen his arm and chest muscles, an 75.0 kg athlete 2.00 m tall is doing a series of push-ups as shown in the figure below . His center of mass is 1.20 m from the bottom of his feet, and the centers of his palms are 30.0 cm from the top of..
Some good estimates about the human body can be made if it is assumed that we are made mostly of water. estimate the number of water molecules in that person
A collision between two protons produces three new particles: p + p --->p + + + 0 + 0. The rest energies of the new particles are + (139.6 MeV), 0 (1116 MeV), 0 (497.7 MeV). Note that one proton disappears during the reaction. How much of the protons..
a steel wire of length 1.93 m with circular cross section must stretch no more than 0.240 cm when a tensile stretching
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
Each square centimeter of the surface of an infinite planesheet of paper has 2400000 excess electrons. Find the magnitude ofthe electric field at a point which is 4 cm from the surface of the sheet.
The active ingredient in the allergy medication Claritin contains carbon (C), hydrogen (H), chlorine (Cl), nitrogen (N), and oxygen (O). find the mass (in grams) of the active ingredient in the standard dosage
A 120cm3 box contains helium at a pressure of 2.20atm and a temperature of 80.0â??C. What is the initial thermal energy of each gas?
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