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Q. A warehouse worker wants to push a 30 kg box up a loading ramp. The coefficient of kinetic friction between the ramps is 0.28, if the ramp is inclined at 20; conclude the applied force required to keep constant velocity up the ramp.
Q. A 20.00 kg child is on a swing that hangs from 3 m long chains. What is her maximum speed if she swings out to a 45.0o angle?
What is the terminal speed at which the bar falls? Imagine the bar remains horizontal and in contact with the rods at all times.
A severe thunderstorm dumped 2.5 in of rain in 30 min on a town of area 33km2. What mass of water (in kg) fell on town? One cubic meter of water has a mass of 103kg.
at what range of speeds can a car safely make the curve.
Create horizontal component of the pendulum
Find the final displacement from the starting point. How much greater was the distance she walked than her displacement.
A car speeds past a stationary police officer while travelling 115km/h. The officer immediately begins pursuit at a constant acceleration of 10.20 km/h/s (note the mixed units), just as the driver passes the officer.
A boy whirls a stone using an r-m long string in a horizontal circle h m above the ground. The string broke, and the stone flies off horizontally and strike the ground x m away.The velocity with which the stone flies off the circle is? The centrip..
A train is travelling up a 4.0 incline at the speed of 3.25 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily.
What is the magnetic field strength. Consider a ladder 5 meters tall, and a 150 kg weight on top of it. The ladder is leaning against the wall.
A pendulum has a period of 0.80s on Earth. What is its period on Mars, where an acceleration of gravity is about 0.37 that on Earth.
A 13kg box slides 4 m down the frictionless ramp , then collides with a spring whose spring constant is 180Nm.
Approximately how many atoms make up our planet? For simplicity, suppose the average atomic mass of the atoms is 14 . Avogadro's number gives the number of atoms in a mole.
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