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A block (mass = 1.8 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.2 x 10-3 kg·m2), as the figure shows. Initially the pulley is prevented from rotating and the block is stationary. Then, the pulley is allowed to rotate as the block falls. The cord does not slip relative to the pulley as the block falls. Assume that the radius of the cord around the pulley remains constant at a value of 0.042 m during the block's descent. Find
(a) the angular acceleration of the pulley and
(b) the tension in the cord.
A 2.40-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 3.20sin(2?t), Find the resonance angular frequency of the system
A crate is dragged across a rough floor by a force of 120N asz` shown below. A friction force of 40N acts to slow the motion of the crate. what is the net work done
The left mass (10 kg) has a coefficient of kinetic friction between itself and the table of .25, calculate the contact force that acts between the masses
An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature, and a 356 Hz tuning fork is held at the open end. Resonance is heard when the piston is at a distan..
A 44.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.24 102 m/s from the top of a cliff 126 m above level ground, What is the initial total mechanical energy of the projectile
The drawing shows a mercury barometer. Consider two barometers, one using mercury and another using an unknown liquid. assume that the pressure above the liquid in each tube is negligible. The height of the unknown liquid is 18.3 times greater tha..
As well, the barbell rotates clockwise about its own center, with an angular speed 80 rad/s.
A point source of light is submerged 2.2 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
Presume that the strength of the electric ?eld about an isolated point charge has a certain value at a distance of 4 m.
A styrofoam cooler (k = 0.030 W/(m·K)) has outside dimensions of 0.270 m by 0.230 m by 0.280 m, and an average thickness of 2.6 cm. About how long would it take for 1.60 kg of ice at 0 °C to melt in the cooler if the outside temperature is 30.0 °C..
A person can jump a horizontal distance of 2.80m on Earth. How far could the person jump on the moon, where the free-fall acceleration is g/6 and g=9.81 m/s2?
Consider the system of capacitors shown in the figure below (C1= 2.00 uF, C2= 3.00 uF). Find the total energy stored by the group
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