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The moment of inertia of the student plus stool is 3.0 kg·m2 and is assumed to be constant. The student then pulls the objects horizontally to 0.50 m from the rotation axis. Find the n
An object at rest explodes into three pieces. Two of them are equal in mass and break off at an angle of 85.2° to each other, both with a speed of 30.6 m/s. The last piece has 4 times as much ma
They want to dock, which means they have to arrive at the same position at the same time with zero velocity. (a) What should the initial velocity of the second spacecraft be? (b) What should be its
A 15 kg box slides d = 4.0 m down the frictionless ramp, then collides with a spring whose spring constant is 160 N/m. The angle of the ramp is 30 degrees. What is the maximal compression of the sp
Bonnie and Clyde are sliding 370 {rm kg} bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 420 {rm N} of force while Bonnie pull
What is the tangential acceleration of a bug on the rim of a 10.0 in. diameter disk if the disk moves from rest to an angular speed of 75 revolutions per minute in 3.0 s?
A curve of radius 51.8 m is banked so that a car traveling with uniform speed 49 km/hr can round the curve without relying on friction to keep it from slipping to its left or right.
What is the tangential acceleration of a bug on the rim of a 5.0 in diameter disk if the disk accelerates uniformly from rest to an angular speed of 79 revolutions per minute in 3.0 s?
Include an explanation of organizational efforts to improve performance, employees' resistance to increasing productivity, and the management's philosophy of motivation and its practices.
Neglecting air friction, what minimum projection angle would achieve this result? What maximum projection angle would achieve this result?
A 17 g rifle bullet traveling 240 m/s buries itself in a 3.9 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal compo
One way to measure g on another planet or moon by remote sensing is to measure how long it takes an object to fall a given distance. A lander vehicle on a distant planet records the fact that it tak
Chromium is produced by reacting with its oxide with aluminum. If 76g of Cr2O3 and 27g of Al completely react to form 51g of Al2O3 how many grams of Cr are formed?
A wheel consists of 20 thin spokes each with mass 0.070kg attached to a rim of mass 4.5kg and radius. Find the rotational inertia
An opaque cylindrical tank with an open top has a diameter of 3.10 m and is completely filled with water. When the afternoon Sun reaches an angle of 27.0° above the horizon, sunlight ceases to i
If 66% of the energy of the red source is absorbed in the blood, by what factor does the amplitude of the electromagnetic wave change?
A 4.20 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process.
An AC power generator produces 54 A (rms) at 3600 V. The voltage is stepped up to 100,000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resis
One billiard ball is shot east at 2.8 m/s. A second, identical billiard ball is shot west at 1.4 m/s. The balls have a glancing collision, not a head-on collision, deflecting the second ball by 90&d
Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 m long. The first moves past her in 2.50 s and the second in 2.40
A 2.00 liter aluminum cylinder at 5°C is filled to the brim with gasoline at the same temperature. If the aluminum and gasoline are warmed to 60.0°C, how much gasoline spills out? [Hint: Be
A concave shaving mirror has a radius of curvature of 24.0 cm. It is positioned so that the (upright) image of a man's face is 2.50 times the size of the face. How far is the mirror from the face?
An 11.0 m, 280 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.60, and the ladder makes a 50.0° angle with the ground. How
A 3.6 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3.8 m/s2, find the force exerted by the rope on the bucket of water.
A 2.3 kg ball strikes a wall with a velocity of 8.3 m/s to the left. The ball bounces off with a velocity of 7.1 m/s to the right. If the ball is in contact with the wall for 0.23 s, what is the co