Determine the reaction force
A man drops a baseball off of the top of the Empire State Building. If the action force is the pull of the Earth on the ball, then what is the reaction force?
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A charge is located at the center of sphere A (radius RA = 0.0010 m), which is in the center of sphere B (radius RB = 0.0012 m). Spheres A and B are both equipotential surfaces. What is the ratio VA/VB of the potentials of these surfaces?
suddenly, a 70.0 kg parachutist makes a soft landing on the turntable at a point near the outer edge. Find the angular speed of the turntable after the parachutist lands. (Assume parachutist treated as particle).
A 5kg ball, moving to the right at a velocity of 2m/s on a frictionless table, collides head on with a 7.5kg ball. Find the final velocities of the balls if the collision is completely inelastic.
Everything on the Earth's surface is rotating in a circle as the Earth rotates on its axis. Does this mean that there is a centripetal force on everything on the surface? Explain.
A soccer player kicks a stationary ball, giving it a speed of 20.0 m/s at an angle of 15.0 degrees to the horizontal. (a) What is the maximum height reached by the ball? (b) What is the ball's range? (c) How could the range be increased?
If the wavelength of the red light in air is 689 nm and the indices of refraction of the oil and water are 1.45 and 1.33, respectively, then what is the minimum thickness of the layer of oil?
Two cylindrical bars, each with diameter of 2.50 cm, are welded together end to end. One of the original bars is copper and is 0.360 m long. The other bar is iron and is 0.180 m long. What is the resistance between the ends of the welded bar at 20
What is the meteroid's speed as it hits the earth? You can neglect the effects of the moon, Earth's atmosphere, and any motion of the earth.
A curve of radius 120 m is banked at an angle of 25o. If the coefficient of static friction between the road and the car is 0.40, what are the maximum and minimum speeds the car can have without skidding?
A 7 omega resistor is mounted in parallel with a resistor R=8 omega, and this combination is connected in series with an 6 omega resistor and a 12 Volts battery. What is the current through the R resistor?
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