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A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 14rpm in 12.0s. Assume the merry-go-round is a uniform disk of radius 2.5m and has a mass of 560 kg, and two children (each with a mass of 25 kg) sit opposite each other on the edge.
(A) Calculate the torque required to produce the acceleration, neglecting frictional torque.
(B) What force is required at the edge?
Dario, a prep cook at an Italian restaurant, spins a salad spinner and observes that it rotates 20.0 times in 5.00 seconds and then stops spinning it. What is the angular acceleration of the salad spinner
An ice chest at a beach party contains 12 cans of soda at 3.93 °C. Each can of soda has a mass of 0.35 kg, determine the final temperature T of the soda and watermelon in degrees Celsius
A 20.0 cm \times 20.0 cm square loop of wire lies in the xy-plane with its bottom edge on the x-axis. The resistance of the loop is 0.550 {\Omega}. What is the size of the induced current in the loop at t=0.510
A rope of length L = 5.2 m with a total mass of m = 0.205 kg is tied to a hook rigidly mounted into a wall. What is the height of the pulse that returns
A boy is trying to retrieve his toast from a toaster using a metal knife. He touches one of the wires inside, which is connected to 120 V. What is the current through his body
Two identical 1.60kg masses are pressed against opposite ends of a spring of force constant 1.60N/cm, Find the maximum speed of each mass when it has moved free of the spring on a smooth, horizontal lab table
In an L-R-C series circuit, the resistance is 420 ohms, the inductance is 0.340 henrys, and the capacitance is 1.80×10?2 microfarads. What is the resonance angular frequency of the circuit
An 77 kg quarterback jumps straight up in the air right before throwing a 0.43 kg football horizontally at 15 m/s. Illustrate how fast will he be moving backward just after releasing the ball?
A disgusted physics student wads up her homework and throws it downward into a trash can. with what speed was the homework hurled
find its velocity after the explosion. The man pulls the boy up to the tree limb C by walking backward at a constant speed of 1.1 m/s. find out the speed at which the boy is being lifted at the instant x_A = 4 {rm m}.
Two people are holding up the ends of a 4.75-kg wooden board that is l = 2.00 m long. A m = 3.00-kg box sits on the board, 0.50 m from one end. What forces do the two people exert.
A machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.8rad/s2 for 7.6s, Find the total number of revolutions turned
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