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Question: The mean radius of the screw of a square-threaded jackscrew is 25 mm. The pitch of the threads is 7.5 mm. If the coefficient of friction is 0.12, what force applied to the end of a lever 600 mm long is needed to raise a load having a mass of 1.84 metric tons?
Assume, instead, that the observer had been moving away from Earth with a speed of 0.80c. How much time would observer have measured for the car to be filled in this case.
a 600 kg car traveling at 24.5 ms is going around a curve having a radius of 120 m that is banked at angle of 20
A particle is acted on by two torques about the origin: τ1 has magnitude 10 N m and pointsin the direction of increasing x, and τ2 has a magnitude of 12N m and points in the direction of decreasing y.
A positive charge q=3.2 x 10^-19 C moves with a velocity v=(2i + 3j - k)m/s through a region where both a uniform magnetic field and a uniform electric field exist. What angle does the force vector make relative to the positive x axis?
To get back to the shuttle, the astronaut unstraps a 10-kg tool kit and throws it away with a speed of 8 m/s. In the script, the astronaut, who has a mass of 80 kg without the toolkit, survives, but is this accurate.
In a steering wheel assembly, a Hooke's universal joint connects two shafts which are inclined at to each other. If the driving shaft speed is 500 rev/min, determine the maximum and minimum speeds of the driven shaft
A cardinal (Richmondena cardinalis) of mass 3.80×10^?2 kg and a baseball of mass 0.145g have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
Rubber stopper attached to one end of the string and 100 g mass attached to the other end. A student gets the rubber stopper going in a horizontal circle above her head.
A rope of length 7.00 m has a mass of 700 g. It is tied between two poles; the tension force in the rope is 40 N. What is the speed of waves on the rope?
Find the string length ratios for Locrian mode by startingwith 'B' and then lowering (never raising) the pitch by perfectfifths, 6 times. If frequency corresponding to 'B' is 495 Hz, whatis the frequency corresponding to 'F'?
A skateboarder, starting from rest, rolls down a 12.5 m ramp. When she arrives at the bottom of the ramp her speed is 6.10 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. .m/s2 (b) If the ramp is inclined at 26.5° wit..
At the instant a traffic light turns green, a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. At that moment a truck traveling with a constant velocity of 15.0 m/s
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