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An 77 kg quarterback jumps straight up in the air right before throwing a 0.43 kg football horizontally at 15 m/s. How fast will he be moving backward just after releasing the ball?
What is the tension in the rope connecting the two boxes? What is the tension in the rope connecting the first box to the ramp?
How various g's of acceleration does the astronaut experience when the device is rotating at top speed? Each 9.80 m/s^2 of acceleration is 1 g.
suppose that the engineer is at x = 0 when, at t = 0, he first spots the locomotive. Sketch x(t) curves for the locomotive and high-speed train for the cases in which a collision is just avoided and is not quite avoided.
What is the force exerted on beam by the fixture P (P is where the beam is attached horizontally to the brick wall) at the wall (magnitude and direction).
Illustrate what gravitational force do the two protons in the helium nucleus exert on each other? Their separation is approximately 1.0 fm
Assume the balloon and rod to be point charges. The Coulomb force constant is 1/(4? ?0) = 8.99 × 10^9 N·m2/C2 and the acceleration due to gravity g = 9.81 m/s2.
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.30 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.85 m/s. How much later (in seconds) should the younger runner start in order to fini..
A flat, uniform, circular disk (R = 2.25 m, m = 84.0 kg) is initially at rest, but it is free to rotate in the horizontal plane about a vertical, frictionless axis through its center.
If the Hawaiian hot spot is a fixed hot spot, which of directions is closest to the direction that the Pacific Plate was apparently moving as the Emperor Seamount Chain formed.
It walks 2.4m along the boat toward shore and the nstops Assuming no friction between the boat and the water, find out how far the dog is then from the shore
How rapidly atom are assembled in this protein synthesis
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizon with a speed of 25 m/s.
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