Final speed of the wreckage
Two identical cars of mass 2010 kg each drive toward one another, both traveling at 24.0 m/s. They collide head-on and smash together; what is the final speed of the wreckage?
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The target is 2000 m from the cannon horizontally and 800 m above the cannon. At what angle (in degrees and three significant figures), above the horizontal, should the cannon be fired?
A toy train rolls around a horizontal 1.2--diameter track. The coefficient of rolling friction is 0.15. What is the magnitude of the train's angular acceleration after it is released? (found) How long does it take the train to stop if it's release
A double-slit experiment is set up using helium-neon laser (λ = 633 nm). Then a very thin film of glass (n = 1.50) is placed over one of the slits. Afterward, the central point on the screen is occupied by what had been the m = 10 dark frin
The bullet hits the target 1.3 cm below the aiming point. Neglect air resistance.(a) What is the bullet's time of flight?(b) What is its muzzle velocity?
A crate of 33.7- tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 336 . After that you must reduce your push to 219 to keep it moving a
The direction of 26.0 north of west from city B to city C. (a) In straight-line distance, how far is city C from city A? (b) Relative to city A, in what direction is city C?
A baseball player slides into home plate. During the slide, the ground exerts a frictional force on the player that decreases her speed. If this frictional force is the action force, what is the reaction force?
Air is flowing through a rocket nozzle. Inside the rocket theair has a density of 5.25kg/m^3 and a speed of 1.2 m/s. Theinterior diameter of the rocket is 15.0 cm. At the nozzle exit, thediameter is 2.5 cm and the density is 1.29kg/m^3. What is th
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