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Q. A package of mass 5 kg sits at the equator of an airless asteroid of mass 7.0 1020 kg and radius 4.5 105 m. We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid it will be traveling with speed 202 m/s. We have a large and powerful spring whose stiffness is 1.3 105 N/m. How much must we compress the spring?
Q. A 380-N, uniform, 1.50-m bar is suspended horizontally by two vertical cables at each end. A small object of weight 520 N is placed distance 0.500 m from the cable A. What is the tension in cable A?
A friend of yours is loudly singing a single note at 411 Hz while racing toward you at 25.5 m/s on a day when the speed of sound is 341 m/s.
You (height of your eyes above the water, 1.75) are standing 2.00 from the edge of a 2.50--deep swimming pool. You notice that you can barely see your cell phone, that went missing a few minutes before, on the bottom of the pool.
Calculate the rates of solar heating
A ship sets out to sail to the point 158 km due north. An unexpected storm blows the ship to a point 134 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive an..
What is sign and magnitude of charge
Find out a magnitude and direction of the electric field
What is the total mass of the reagents used in the combustion throughout the 30 days . The ball makes 17 oscillations in 16 seconds. What is it the mass of the ball.
The tortoise can run with a speed of 0.1 m/s and the hare can run with a speed of 2 m/s. They start their race at the same time, but the hare, feeling confident, stops along the way for a two minute nap, and the tortoise wins by the length of his ..
Calculate the dc voltage applied to the circuit.
To which, according to the rotational analog of Newton's second law, is the angular acceleration experienced by an object directly proportional?
Angular acceleration and angular displacement of the rotor using the equation of motion in rotational dynamics.
A roller coaster is towed up an incline at a steady speed of 0.51m/s by a chain parallel to the surface of the incline. The slope is 2.85 % that means that the elevation increases by 2.85 m for every 100m of horizontal distance.
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