A student could either pull or push, at an angle of 30 from the horizontal, a 50 kg crate on a horizontal surface, where the coefficient of kinetic friction between the crate and surface is 0.19. The crate is to be moved a horizontal distance of 15 m.

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Q: A body of weight 50 N is hauled along a rough horizontal plane by a pull of 18 N acting at an angle…

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Q: under what conditions the tension in the string pulling horizontally on the cart equal in magnitude…

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Q: A 10 kg block sits on a horizontal surface and is pushed parallel to that surface.  The coefficients…

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Q: A 50-N block, on a 30° incline, is being held motionless by friction. The coefficient of static…

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Q: A 8.2 kg mass slides down a flat hill that makes an angle of 32 with the horizontal. If friction is…

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Q: A 124 kg crate is pushed at constant speed up a frictionless inclined plane of θ = 48 ° with the…

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Q: The 50-kg crate rests on a horizontal surface for which the coefficient of kinetic friction is uk =…

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Q: The floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction…

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Q: A 100 kg crate is being pushed on a horizontal floor at constant velocity. Given that the…

A: Mass of crate(m) = 100 kg Friction  coefficient (μκ) = 0.2 g= 9.8 m/s2

Q: A shark, of mass 95 kg, is swimming with a constant velocity of 7.2 m/s [32° above the horizontal].…

A: Write a given values of this question.

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.