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a pulley of 5.0cm radius, on a motor, is turning at 30 rev/s and slows down uniformly to 20 rev/s in 2 s. calculate the angular acceleration of the motor, the number of revolutions it amkes in this time, and the length of the rope it winds in this time.
A solid block of mass m2 = 0.5 , at rest on a horizontal frictionless surface, is linked to a relaxed spring (with spring constant k = 150 whose other end is fixed. Another solid block of mass m1 = 2.4 and speed v1 = 2.2 collides with the 0.50 blo..
When scuba diving, you must equalize the pressure inside your body with the water outside every few meters you dive downward or swim upwards in order to avoid serious health complications. Calculate how far underwater you must dive
the hammer throw is a track-and-field event in which a 7.1-kg ball the hammer starting from rest is whirled around in a
Assuming that the ram spring is oriented vertically and is still compressed by 1.17 10-2 m when the downward-moving ram hits the staple, find the speed of the ram at the instant of contact
A ring of radius R has uniform charge per unit lenght ? C/m (?>0), and z is the dince along its axis. Explain why the electric field must be zero at the center of the ring
a copper block is removed from a 306 oven and dropped into 1.30 of water at 20.5. the water quickly reaches 25.9 and
Discuss the relative merits of using the Biot-Savart law and Ampere's law to calculate the magnetic field around the wire. In this case, is it necessary to include the Maxwell correction to Ampere's law?
a 28kg suitcase is being pulled with constant speed by a handle that is at an angle of 30circ above the horizontal. if
A ray of light makes an angle of 25 degrees with the normal to a plane mirror. through what angle is the reflected ray rotated
How far from a -6.20 microcoulombs point charge must a 2.30 microcoulombs, Calculate the distance in meters
A 0.240 kg block on a vertical spring with spring constant of 4.20 103 N/m is pushed downward, compressing the spring 0.045 m. How high does it rise above the point of release
question1in an xray tube electrons are accelerated in a uniform electric field and then strike a metal target. assume
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