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A bag of cement of mass m is place on plank of length L. Bag is place distance L/4 from right end of plank. Plank has mass m. two person pick up plank, one at each end. Determine how much must man nearest bag support?
q. a paratrooper pilot fell 360 m after jumping without his parachute opening. he landed in a snow bank creating a
a landing airplane makes contact with the runway with a speed of 40 m/s and moves toward the south. What is the average acceleration of the airplane
A ship has a mass of 40000 kg. its energy gives it an acceleration of 0.27 m/s while it travels a distance of 105 meters from rest. what force does the engine exert on the ship.
power is generated at 24 kv at a generated plant located 118 km from a town that requires 50 mw of power at 12 kv. two
An electric field of 1.50 kV/m and perpendicular magneticfield of 0.400 T act on a moving electron to produce no net force. What is the electron's speed
Incident photons strike a soduim surface having a work function of 2.2 eV, causing photoelectric emission. What is the wavelength of the incident photons
an lc circuit consists of a capacitor with c 3.4 x 10-6 f and an inductor with l .08h. at t 0 the capacitor has
At 14.7 g mass is attached to a frictionless, horizontal spring. After the spring was stretched a certain distance and released, what is the oscillation frequency of the spring
A block of mass m = 2.0 kg is dropped from height h = 90 cm onto a spring of spring constant k = 1960 N/m. Find the maximum distance the spring is compressed
a 10.0kg, 16.0m long, uniform beam is supported by two scales. A 40.0kg box is placed on the beam. what are the scale readings
suppose that a ferrari and a porsche begin a race with a moving start and each moves with constant speed. one lap of
Your company makes anemometers and plans to install light bulbs on them for high wind warnings. calculate the number of turns in the coil wire needed to light the bulb
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