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Q. A dynamite blast at a quarry launches a rock straight upward, and 2.1s later it is rising at a rate of 14m/s. assuming air resistance has no effect on the rock, compute its speed
(a) at launch and (b) 5s after launch.
What was the arrow's initial speed. A small sphere with a mass of 2.00×10^-3g and carrying the charge of 4.80×10^-8C hangs from a thread near a very large, charged insulating sheet. The charge density on the sheet is -2.90×10^-9C/m^2 .
A mass of 1.62 kg stretches a vertical spring 0.328 m. If the spring is stretched an additional 0.136 m and released, how long does it take to reach the (new) equilibrium position again.
An airplane needs to reach a velocity of 487 km/h to take off. On a 2000 m runway, what is the least acceleration necessary for the plane to take flight.
A boy shoots a BB gun horizontally at a target 15 m away. The gun is aimed directly at the center of the target, but the small metal BB hits 56 cm lower. avoid any air resistance, what was the initial speed of the BB.
How to compute the average force
King Arthur's knights fire cannon from the top of the castle wall. The cannonball is fired at a speed of 60 m/s and an angle of 33. A cannonball that was accidentally dropped from the top of the castle wall hit the moat below in 1.80s.
How strong is the electric field between the plates.
A 4.6 long, 480 steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction.
A 700 N car traveling at 25m/s.The breaks are applied suddenly and the car slides to a stop. The average breaking force between the tires and the road is 7100 N.How far will the car slide once the breaks are applied.
explain the magnitude of the centripetal acceleration. At what two locations on the x-axis (xpositive, xnegative) is the potential zero.
A sports car moving at constant speed travels 90 m in 4.9s. If it then brakes and comes to a stop in 4s, what is its acceleration? Express the answer in terms of g's, where g = 9.80 m/s2. (Take the positive direction to be direction of travel.)
In NYU's Diffraction and interference lab for general physics 2, what are the widths given on the slide with the double slits. On the lab manual it says they were given on the slide.
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