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Solve the all parts of given question:
Question: A 140-g baseball is dropped from a tree 13.0m above the ground.
Part I: With what speed would it hit the ground if air resistance could be ignored?
Part II: If it actually hits the ground with a speed of 8.50m/s, what is the magnitude of the average force of air resistance exerted on it?
I need help to find the magnitude of the average force of air resistance exerted on it.
A 5.20 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process. At what height above the surface of the earth does t..
lucite has index of refraction 1.49. the brewster's angle is56.1o. if unpolarized light is incident on the surfaceof a piece of lucite at this angle, describe the degree ofpolarization of the reflected light.
Suppose manufactures increase in size of compact disks. By what factor will the moment of inertia increase
A 1.00 kg glider on a horizontal air track is pulled by a string at an angle θ. The taut string runs over a pulley and is attached to a hanging object of mass 0.500 kg .
question a luminous object is 3.40m from a wall. you are to use a concave mirror to project an image of the object on
Two soccer players start from rest, 45 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
A projectile is fired straight upward from the Earth's surface at the South Pole with an initial speed equal to one third the escape speed. What is the altitude of the projectile at this instant
A 11 kg block is at rest on a level floor. A 380 g glob of putty is thrown at the block such that it travels horizontally, what is the initial speed of the putty
The energy for the 5s valence electron in rubidium (Z=37) has energy ?4.18 electron volts. What is the effective nuclear charge Zeff experienced
A 20-kg child swings back and forth on a swing such that her height h in m from the ground as a function of x is described by: h(x) = 0.5 + 0.45x2 for -1.2 m ? x ? 1.2 m, What is the maximum potential energy of the child
If the x position of a particle is measured with an uncertainty of 1.00×10-10 m, then what is the uncertainty of the momentum in this direction
A 2kg mass is loaded into a spring cannon. The cannons spring has a constant k=4000N/m and the spring is compressed 0.8m. The mass is initially at rest. what is the initial velocity of the mass
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