Determining the final speed of the crate
A 150- crate, starting from rest, is pulled across a floor with a constant horizontal force of 360 . For the first 11 the floor is frictionless, and for the next 11 the coefficient of friction is 0.31. What is the final speed of the crate?
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A man pushes a lawn mower on a level lawn with a force to 200 N. If 40% of this force directed horizontally, how much work, in J, is done by the man in pushing the mower 6.0 m?
A flask contains 0.320mol of liquid bromine, Br2. Determine the number of bromine molecules present in the flask. Express your answer numerically in molecules.
Two stationary point charges of 4.00 nC and 2.00 nC are separated by a distance of 60.0 {rm cm}. An electron is released from rest at a point midway between the charges and moves along the line connecting them. What is the electric potential energ
Based on this value and the standard enthalpies of formation for the other substances, what is the standard enthalpy of formation of CH3CH2OH(g) ? kJ/mol.
While rearranging a dorm room, a student does 224 J of work moving a desk 2.5 m. What was the magnitude of the applied horizontal force?
A 278-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.870, and the l
It accelerates uniformly and the rate of rotation of its wheels increases from 219 rpm to 265 rpm in a time of 20.1 s. Find the linear acceleration of the bicycle.
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