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man pulls a block of mass m = 15 kg up an incline at a slow constant velocity for a distance of d = 4.5 m. The incline makes an angle q = 35° with the horizontal. The coefficient of kinetic friction between the block and the inclined plane is µk = 0.2.
a) What is the work Wm done by the man?
At the top of the incline, the string breaks and the block, assumed to be at rest when the string breaks, slides down a distance d = 4.5 m before it reaches a frictionless horizontal surface. A spring is mounted horizontally on the frictionless surface with one end attached to a wall. The block hits the spring, compresses it a distance L = 0.5 m, then rebounds back from the spring, retraces its path along the horizontal surface, and climbs up the incline.
b) What is the speed v of the block when it first reaches the horizontal surface?
c) What is the spring constant k of the spring?
d) How far up the incline d1 does the block rebound?
A flute player hears four beats per second when she compares her note to the 523 tuning fork (the note C). She can match the frequency of the tuning fork by pulling out tuning joint to lengthen her flute slightly. What are the three possible value..
In the vertical case the maximum tension in the string is 18.0% larger than the tension that exists when the circle is horizontal. Identify the speed of the stone.
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Your task in physics lab is to make a microscope from two lenses. One lens has a focal length of 2 cm, the other a focal length of 1 cm. What will be the magnification of your microscope
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Suppose there was a process by which two photons, each with momentum 0.60MeV/c ,could collide and make a single particle. find the maximum mass that the particle could possess
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Atomic nuclei have a typical density of about 10^(17) kg/m^3. The density of liquid mercury is roughly 10^(4) kg/m^3. Approximately what fraction of the volume of liquid mercury is empty space between mercury nuclei?
An object that is 27 cm in front of a convex mirror has an image located 13 cm, How far behind the mirror is the image located when the object is 13 cm in front of the mirror
A Projectile is fired with an initial velocity of 60 m/s at an angle of 379 to the horizontal. Assuming there is no friction, what is the horizontal range of the projectils
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