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In compressing the spring in a toy dart gun, 0.6 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.05 kg.
(a) What is the dart's kinetic energy as it leaves the gun?
(b) What is the dart's speed?
A 1000.0 kg car is moving at 15 km/h. If a 2000.0 kg truck has 18 times the kinetic energy of the car, how fast is the truck moving
With a quick flick of her wrist, an Ultimate Frisbee player can give a Frisbee an angular velocity of 5.00 revolutions per second. Through what angle, in radians, does the player rotate the Frisbee
A playground merry go round of a diameter 6m and mass 240 kg is rotating at 12 rev/min about a frctionless vertical axle. Facing the axle, a 30kg child hops on to the merry go round and manages to sit down on its ledge. What is the new angular spe..
The increase in the kinetic energy of the box
A certain superconducting magnet in the form of a solenoid of length 1.20 m can generate a magnetic field of 11.0 T in its core when its coils carry a current of 145 A. Find the number of turns in the solenoid
A 9.00 kg sign hangs unevenly between 2 beams. On the right hand side, the angle between the horizontal and the cable is 16.0 degrees. Find the tension in the left side cable
In a Young's double slit experiment, the slit separation is made to be exactly 4?. At what angle will the third bright fringe to the side of the central fringe occur? Caution: the angles involved are such that the approximation sin? is not valid.
q1. a 52.0 skateboarder wants to just make it to the upper edge of a quarter pipe a track that is one-quarter of a
Calculate the change in potential energy of a 86.4 kg man when he takes an elevator from the first floor to 35th floor, if the distance between floors is 4.11 m
A 50 kg child takes a ride on a roller coast . the coaster maintains a constant speed of15 m/s as it moves around a loop of radius 10m. what is the centrupetal acceleration of the child
A person stretches a rope of length 55 m between the top of a building to the base of a tree d = 23 m away. How tall is the building.
A) If the squid has 1.75 kg of water in its cavity, at what speed must it expel this water to instantaneously achieve a speed of 2.70 m/s to escape the predator? Neglect any drag effects of the surrounding water. B) How much kinetic energy does th..
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