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A solid disk of mass m1 = 9.5 kg and radius R = 0.18 m is rotating with a constant angular velocity of ω = 39 rad/s. What average torque was exerted on the rod by the disk
An elevator can lift a 107 N aircraft a distance of 26 meters in 11 s. What is the power output of the elevator
A worker on top of a radar tower 22.4 ft high drops a wrench off the tower. What is the speed of the wrench when it hits the ground
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the
A 202 kg cart runs into the rear end of a 103 kg cart that is stationary. what is the speed of the cart before collision
A parallel plate capacitor of capacitance 4.1 uF has the space between the plates filled with a slab of glass with k = 2.9, Find the energy stored in the capacitor after the glass is removed
In a mall, a shopper rides up an escalator between floors. At the top of the escalator, the shopper turns right and walks 5.90 m to a store. At what angle is the escalator inclined above the horizont
A converging lens of focal length 7.830 cm is 19.8 cm to the left of a diverging lens of focal length -6.16 cm. Find the location of the coins final image
You push with a horizontal force of 43.7N against a 25.0N box, pressing it against a rough wall to hold it in place. What is the friction force on the box
The observed frequency of a train whistle is 475Hz as it approaches a stationary observer and is 410Hz as it recedes
A material of resistivity %u03C1 is formed into the shape of a truncated pyramid of altitude 3a, Find the resistance of the wire
A 32g bullet is fired from a rifle at 380 m/s into a water bottle at a pointblank range. The bullet travels completely through the 12 cm long bottle, find the average force exerted by the water on t
A hot-air balloon is rising straight up with a speed of 1.82 m/s, How much time elapses before the ballast bag hits the ground
Find the mechanical energy of a block-spring system having a spring constant of 0.67 N/cm and an oscillation amplitude of 1.5 cm
In an electric shaver, the blade moves back and forth over a distance of 2.0 mm in simple harmonic motion, with frequency 122 Hz. find the magnitude of the maximum blade acceleration
A 0.32 kg body undergoes simple harmonic motion of amplitude 9.1 cm and period 0.40 s. What is the magnitude of the maximum force acting on it
A small rubber ball is launched by a compressed-air cannon from ground level with an initial speed of 18.9 m/s directly upward. How long does it take to reach the maximum height
A draw bridge of length L is being held up by an axel at its pivot and by a chail that is also of length L. The drawbridge has uniform mass. What is the minimum angle to shoot an arrow
A solid sphere and a shell sphere roll down an incline. Which one gets to the bottom first and why
The vertical displacement y(x,t) of a string stretched along the horizontal x-axis is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 rad/s)t]. What is the distance between adjacent crests of th
Suppose you performed the experiment in atmosphere of Argon at 25 deg. C, How many electrons have been attached to, or detached from the initially neutral plastic sphere
Two loud speakers separated by a distance of 2.0 m are in phase. Assume the amplitudes of the sound from the speakers are approximately the same at the position of the listener, For what frequencies
Boy is stands on a scale in an elevator that is accelerating upward. Scale reads 723.8 N. Find magnitude of the acceleration of the elevator
A professor shipwrecked on Hooligan's Island decides to build a telescope from his eyeglasses and some coconut shells. Which lens should he use as the objective
Two soccer players start from rest, 47 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide