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Jill, who has a mass of 52 kg, is having a tug-of-war with Brian, who has a mass of 114 kg. Brian, being much stronger than Jill, easily pulls Jill towards him with an acceleration of 9.7 m/s2 by exerting a force of 460 N on the rope. How hard is Jill pulling on the rope?
Speed of an aircraft at takeoff when launched from a catapult on an aircraft carrier The catapult on an aircraft carrier can take an aircraft from 0 to 207 mph in 9 seconds, at which time the aircraft launches.
A 2900 kg truck traveling north at38 km/h turns east and accelerates to58 km/h. What is the change in the truck's kinetic energy
The intensity on the screen at a certain point in a double-slit interference pattern is 72.0% of the maximum value. What minimum phase difference (in radians) between sources produces this result
a. what rms current is drawn by a 3400-w electric room heater when running on 120 v rms?b. what is the power
In a classical model of the hydrogen atom, the electron orbits a stationary proton in a circular orbit
A rail car that weighs 28 N is accelerated at 3.6 m/s/s for 2.2 seconds. How much work is done on the rail car
A disk-shaped merry-go-round of radius 2.73m and mass 185kg rotates freely with an angular speed of 0.681rev/s. What is the final angular speed of the merry-go-round
A sledge loaded with bricks has a total mass of 17.5 kg and is pulled at constant speed by a rope inclined at 20.3° above the horizontal. How much work is done by the rope on the sledge
consider two identical 70-micro-coulomb point charges each of 65 mg mass. let them initially be at rest 40 cm apart.
A 24.0 kg child plays on a swing having support ropes that are 2.20 m long. How fast will she be moving at the bottom of the swing
Positive charge is spread uniformly over the surface of a spherical balloon 70cm in radius, resulting in an electric field of 36kN/C at the balloon's surface. What is the net charge on the balloon
A 0.46 kg block slides across a tabletop with initial velocity of 3.1 m/s, Find the average friction force that retarded its motion
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