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During a certain period of time, the angular position of a swinging door is described by ? = 5.03 + 9.8t + 1.90t2, where ? is in radians and t is in seconds. Determine the angular position, angular speed, and angular acceleration of the door at the following times.
Two ice skaters, Daniel (mass 60.0kg) and Rebecca (mass 45.0kg), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, find the magnitude of Daniel's velocity after the collision
A hook is boxing primarily involves horizontal flexion of the shoulder, while maintaining a constant angle at the below. What is the average speed of the fist during the hook
An extreme skier, starting from rest, coasts down a mountain slope that makes an angle of 25.0o with the horizontal. How fast is she going just before she lands
A 6.00kg block is pushed 9.25m up a smooth 39.0? inclined plane by a horizontal force of 73.0N. Calculate the initial kinetic energy of the block
When light of wavelength 360 nm falls on a lithium surface, electrons having a maximum kinetic energy of 1.15 eV are emitted. determine the work function of lithium
A spelunker is surveying a cave. She follows a passage that takes her a distance 189 straight west, then a distance 220 in a direction 45 east of south, after that a distance 280 at 30 east of north. After a fourth unmeasured displacement she find..
Three charges make a triangle. Q1 is a 50 uC charge at the origin. Q2 is a -86 uC charge at (.52 m, 0). Q3 is a 65 uC charge at (0, .3). what is the total force on Q3?
A beam of particles is directed at a 0.021-kg tumor. There are 2.3 x 1010 particles per second reaching the tumor, Find the biologically equivalent dose given to the tumor in 12 s
What is the highest possible temperature of the spoon when you finally take it out of the cup?
A solid disk is rotating clockwise with an angular velocity of ? = 3 rad/s. Find the moment of inertia of the disk
A rms AC voltage of 118 V at 60 Hz is applied to an RLC circuit with 11.8 mH inductor, 0.171 µF capacitor, and 43.1 ? resistor in series. What is the power consumed in the circuit
A body of mass 6 kg is acted upon by a force which causes a displacement in it given by x = t2/4 metre where t is the time in seconds
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