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When traveling past an observer with a relative speed v, a rocket is measured to be 9.10 meter long. When the rocket moves with a relative speed 2v, its length is measured to be 4.90 meter. Determine the speed v? Compute the proper length of the rocket?
An amusement park ride called the Rotor consists of a room in theshape of a vertical cylinder (1.98 m inradius) which, once the riders are inside, begins to rotate,forcing them to the wall. When the room reaches a speed of onerotation every 1.56 s..
a merry-go-round r=2m, initially at rest is given a constant tangential push that depends on time. F(t) =β(t) applied on the rim. β=10N/s, Calculate angular acceleration as a function of time
The most energy efficient way to send a spacecraft to the Moon is to boost its speed while it is in circular orbit about the Earth such that the new orbit is an ellipse. The boost point is the perigee of the ellipse, and the point of arrival at th..
q1. a car slows down with an acceleration that has a magnitude of 3.6 ms2. while doing so it travels 113 m in the x
Three identical boxcars are coupled together and are moving at a constant speed of 28.0 on a level, frictionless track. What is the speed of the four cars
A 75 kg person is standing in an elevator that is moving upwards at 0.5m/s and accelerating downwards at 0.2 m/s2. What is the normal force of the elevator floor acting on the person
The typical operating voltage for anelectron microscope is V =50kV. (a) What isthe smallest feature one could hope toresolve? (b) What isthe equivalent resolution if neutrons are used?
Water undergoes viscous flow through two pipes with the same pressure difference between the ends. what is the flow rate through pipe 2
A uniform rod of mass 3.05×10?2kg and length 0.450m rotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. What is the angular speed of the rod after the rings leave it?
A 1.00 kg block Is resting against a light, compressed spring at the bottom of a rough plane inclined at an angle of 30 degrees. Kinetic friction between box and plane is 0.100. Suppose the spring is compressed 10 cm from its equilibrium length.
q1. a rock is throwing from a tall building. the rock reaches its maximum height above the top of the building 1.77 s
Starting from rest, a 4.80-kg block slides 2.00 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is ?k = 0.436. Determine the work done by the friction force
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