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a) A large asteroid of mass 71700 kg is at rest far away from any planets or stars. A much smaller asteroid, of mass 930 kg, is in a circular orbit about the first at a distance of 256 meters as a result of their mutual gravitational attraction. What is the speed of the second asteroid?
_____ m/s
b) Now suppose that the first and second asteroids carry charges of 2.68 C and -2.68 C, respectively. How fast would the second asteroid have to be moving in order to occupy the same circular orbit as before?
A bowling ball of mass 7.2 kg and a radius of 9.9 cm rolls without slipping down a lane at 2.8m/s. Calculate its total kinetic energy
An electron is placed in a uniform electric field of strength 210 N/C. If the electron is at rest at the origin of a coordinate system at t = 0 and the electric field is in the positive x-direction
The fastest pitched baseball was measured at 46 m/s, what force did he produce on the ball during this record-setting pitch
The observed frequency of a train whistle is 475Hz as it approaches a stationary observer and is 410Hz as it recedes
Since Selma had so much fun, Arnold decides to take up sky diving as well. He falls out of the plane (with a parachute) and after a long time reaches a roughly constant speed of 55m/s. How far did he drop during that time
Two microscopes are placed one on top of the other. They are in contact at one end but a hair separates them at the other end. determine the thickness of the hair?
The electric field lines on the left have twice the separation of those on the right. If the magnitude of field at point-A is 60 V/m, what is the magnitude of the field at point-B.
Two identical capacitors store different amounts of energy: capacitor A stores 2.7 x 10-3 J, Find the voltage across the plates of capacitor A
question1a 408 kg mass is brought close to a second mass of 110 kg on a frictional surface with coefficient of friction
Illustrate what is the average force exerted on the ball by the bat? Neglect the weight of the bat, since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positive direction.
a 5.0 kg object is supported by an aluminum wire of length 2.6m and diameter 2.2mm. How much will the wire stretch
A 25 N force at 60° is required to set a crate into motion on a floor. What is the value of the static friction
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