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a tennis player places a 50 kg ball machine on a frictionless surface. the machine fires a 0.054 kg tennis ball horizontally with a velocity of 35 m/s toward the north. what is the final velocity of the machine? answer in units of m/s
A football quaterback runs 15.0 m staright down the playing field in 2.50s. what are the average velocities for the three intervals
A 8.41 kg crate slides on a horizontal surface. The coefficient of kinetic friction between the surface and the crate is 0.496. what is the magnitude of the external force acting on the crate
A 14.2-g piece of Styrofoam carries a net charge of -0.69 µC and is suspended in equilibrium above the center of a large, horizontal sheet of plastic that has a uniform charge density on its surface. What is the charge per unit area on the plastic..
Here is a box on whose surfaces the electric field is measured to be horizontal and to the right, Calculate the electric flux through every face of the box, Calculate the total flux through the box
an electron is shot directly toward the center of a large metal plate that has surface charge density -1.00 × 10-6 C/m2. how far from the plate must the launch point be
A dog sitting 3.7m from a vertical mirror thinks its image is another dog. How far is the image from the dog
An astronaut living at a space station is in a constant state of free fall- the only force exerted on her and on the space station is the gravitational force due to the Earth. How can an astronaut determine her mass while on an extended stay in sp..
Water flows at a rate of 26L/min through a horizontal 8.0 cm diameter pipe under a pressure of 9.2 PA. What is the pressure at this point
A Hollywood daredevil plans to jump the canyon shown in the figure on a motorcycle. What is his predicted landing velocity
What angular acceleration is necessary to increase the angular speed of a fan blade from 8.9 rad/s to 15.7 rad/s in 5.4seconds? answer in units of rad/s2
If that angular acceleration is 1.8rad/s^2, illustrate what is the total momentum of inertia about the axis of you and the chair?
A sphere of mass M is supported by a string that passes over a pulley at the end of a horizontal rod of length L, Find the mass of the portion of the string above the rod
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