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A star ship moving toward Earth with a speed of 0.78 c launches a shuttlecraft in the forward direction. The shuttle, which has a proper length of 12.3 m, is only 6.27 m long as viewed from Earth. What is the speed of the shuttle relative to the star ship?
A 60 kg bicyclist rides his 9.8 kg bicycle with a speed of 16 m/s. What is the magnitude of the braking force
a radar pulse travels from the earth to the moon and back in 2.6 seconds. Calculate the distance from the earth to the moon
A hockey goalie in full gear has a mass of 100.kg. A 0.145 kg puck is shot at him with a veloctiy of 49m/s. Would this be an elastc or inelastic collison? Explain?
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
An .8m string has a .3kg mass on the end. If the string breaks at 5000N, what's the max velocity at the top and bottom of a vertical circle
A student (m = 63kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.040 s. From what height did the student fall
The net force actingon a 6.0-kg object is given by Fx= (10.0 - x) N,where Fx is in newtons andx is in meters. How much work is done on the object as it moves from x = 0.0 to x = 10.0m
if the temperature inside a room is 298k and the temperature outside is 263k calculate the maximum value of r relative
Calculate the edge length of a cube that has the same volume as a sphere of radius 4.0 cm. How much greater is the surface area of the cube than that of the sphere
A crate of mass 56 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person, what is the crate's acceleration
The first sled is 30kg, connected with rope B to the second sled of mass 20 kg, connected with rope A to the first sled of mass 10 kg, which is being pulled by a rope of 137 N. Illustrate What is the tension in ropes A and B.
A 5.1kg mass hanging from a spring scale is slowly lowered onto a vertical spring, as shown in the figure(Figure 1) . a.) What does the spring scale read just before the mass touches the lower spring? b.) The scale reads 25 when the lower spring has ..
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