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A uniform drawbridge must be held at a 35.0?angle above the horizontal to allow ships to pass underneath. The drawbridge weighs 4.05×104N , is 13.5m long, and pivots about a hinge at its lower end. A cable is connected 3.25m from the hinge, as measured along the bridge, and pulls horizontally on the bridge to hold it in place.
If the cable suddenly breaks, what is the initial angular acceleration of the bridge? (in rad/s^2)
Sources A and B emit long-range radio waves of wavelength 530 m, with phase of the emission from A ahead of that from source B by 90°. The distance rA from A to a detector is greater than corresponding distance rB from B by 110 m. What is the magni..
A 0.800mm -diameter ball bearing has 2.50×109 excess electrons, What is the ball bearing's potential
Compare the distance he wanted to cover in the real world with the "theoretical" distance that could be covered if there was no air resistance - If the engine was close to 100% efficient how much petrol would be used to overcome air resistance duri..
Suppose a tank contains 774 m3 of neon (Ne) at an absolute pressure of 1.01Ã-105 Pa. What is the increase in the internal energy of the neon
One fragment, whose speed immediately after the explosion is zero, falls vertically. Illustrate what is the horizontal speed of the other fragment?
An 8.0 m, 100 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.40, what is the minimum angle that ladder can make with the floor before it slips.
A mass m1 = 1 kg rests on top of a mass m2 = 5 kg which is attached to a spring (k = 50 N/m), Determine the maximum amplitude of the motion such that the top mass does not slip
Three children each of weight 356N make a long raft by lashing together logs of diameter 0.30m and length 1.8m. how many logs will be needed to keep them afloat in fresh water. take density of the logs to be 800kg/m^3.
A proton moving at 3.1×105m/s to the right enters a region where a uniform electric field of magnitude 53kN/C points to the left
The rotational inertia of a collapsing spinning star changes to 1/4 its initial value. What is the ratio of the new rotational kinetic energy to the initial rotational kinetic energy.
The electric field on the axis of a uniformly charged ring has magnitude 400kN/C at a point 5.6cm from the ring center, Find the rings radius and charge
A ball is placed on an edge of a cliff and it is kicked by a soccer player at 20.0 m/s at an angle of ? = 30? above the horizontal, Find the height of the cliff
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