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4. A pitcher throws a ball weighing 0.3 lb at a velocity of 90 miles per hour (horizontally). The mass moment of inertia of a spherical body is 0.4mR2 [assume the diameter of the ball is 3.25 in] and the ball is spinning at an angular velocity of 30 rad/sec. What is the total energy of the ball?
What is the ratio of the amplitude
A coffee filter of mass 1.5 grams dropped from a height of 2 m reaches the ground with a speed of 0.7 m/s. How much kinetic energy Kair did the air molecules gain from the falling coffee filter? begin from the Energy Principle, and choose as the s..
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.10×106N , one at an angle 10.0? west of north, What is the total work done by the two tugboats on the supertanker
A glass soda bottle is emptied of soda and filled to the very top with water. A cork is carefully fitted into the top of the bottle, leaving no air between the cork and the water.
A flea pulls on a puck with force 7 microN at an angle of 30?. Another flea pulls on the puck with force 2 microN at an angle of -60?.
A 200 weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 30 m/s^2 for 33 s, then runs out of fuel. Ignore any air resistance effects. Illustrate what is the rocket's maximum altitude?
A toy car moves at a velocity of 65.00 m/s on a compass heading of 115degrees. What are the components, magnitude and direction of car.
Two long, parallel wires are separated by a distance of 3.40. The force per unit length that each wire exerts on the other is 3.20×10-5, and the wires repel each other. The current in one wire is 0.6690.
The height of a helicopter above the ground is given by h = 3.00 t3, where h is in meters and t is in seconds. After 2s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground.
An aircraft with a mass of 956 kg accelerates from 0 to 92 m/s in 6.7 seconds, What is the kinetic energy of the aircraft when the aircraft launches
A parachutist descending at a speed of 13.4 m/s loses a shoe at an altitude of 54.2 m. Illustrate what is the velocity of the shoe just before it hits the ground? The acceleration of gravity is 9.81 m/s2.
Two charges are placed on the x axis. One of the charges (q1 = +6.95C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find out the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b..
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