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a box of weight w is sliding down a plane that is frictionless and inclined at angle θ above the horizontal. What is work done on box by force of gravity if box moves distance d?
A 2.0-mW laser pointer has a beam diameter of 1.7 mm. When it is accidentally pointed at a person's eye, What is the intensity of light incident on the retina
a person with a mass of 50 kig is holding on to a rope of 15 kg which is attached to the ceiling. note that the person
A 4.60-kg ball is dropped from a height of 10.0m above one end of a uniform bar that pivots at its center. how high will the ball go after the collision
at the moment t 0 a stationary particle of mass m experiences a time-dependent force f at t - t where a is a constant
Each cable has a length of l = 2.70 -{rm m}. What is the tension T in each of the cables? Use 9.80- {rm m/s}^2 for the magnitude of the acceleration as a result of gravity.
Calculate the total angular momentum of our Moon relative to the center of the Earth. You may assume that the Moon is a uniform sphere
Considering just the Sun and Jupiter, determine the radius of the circular orbit the Sun makes about the Sun-Jupiter center of mass
A 100 liter water tank is filled to the brim with water when the temperature is 5.00°C. Water has a coefficient of volume expansion of 207 × 10-6/°C. what is the volume of water that overflows the tank
the velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees North of West. find the velocity of the boat with respect to the ground
The displacement of a particle moving under uniform acceleration is some function of elapsed time and acceleration. Suppose we write this displacement as: s=ka^mt^n where k is the dimensionless constant.
Two identically charged particles separated by a distance of 6.5 m repel each other with a force of 8.5 N. What is the magnitude of the charges
Consider a group of 20 molecules with the following speeds: three have speed 1 m/s, Determine the rms speed (in m/s) of the molecules in this group at this instant in time
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