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Q. A bullet of mass 0.0025 kg moving at 581 m/s impacts a large fixed block of wood and travels 5.40 cm before coming to rest.
Assume that the acceleration of the bullet is constant; find the force exerted by the wood on the bullet.
Reply in units of kN
General relativity says that the total orbital energy of the binary system consisting of two neutron stars will decrease over time through the emission of gravitational waves. If this happens slowly sufficient that the orbit stays circular, response ..
How much does the rocket clear the top of the wall
A small rocket to gather weather data is launched straight up. few seconds into the flight, its velocity is 110 and it is accelerating at 17 . At this instant, the rocket's mass is 50 and it is losing mass at the rate of 0.45 as it burns fuel.
A chair of weight 135 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 38 directed at an angle of 42 below the horizontal and the chair slides along the floor.
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Two trains and a bird Two trains, each having a speed of 23km/h, are headed at each other on the equal straight track. A bird that can fly 60km/h flies off the front of one train when they are 70 km apart and heads directly for the other train.
A planet's moon travels in an approximately circular orbit of radius 6.6 x10^7 m with a time of 7 h 9 min. Calculate the mass of the planet from this information.
At t = 0, a particle leaves the origin with the velocity of 9 m/ s in the positively direction and moves in the x y plane with a constant acceleration of (2.0i - 4.0j) m/ s2. At the instant the x coordinate of the particle is 15m, what is the spee..
Two particles with masses m and 3m are moving toward each other along the x axis with the similar initial speeds vi. Particle m is traveling to the left, while particle 3m is traveling to the right.
A 2.65 block is pushed 1.69m up a vertical wall with a constant speed by a constant force of magnitude F applied at angle 55.4 degrees with the horizontal. g= 9.8 m/s2. If the coefficient of kinetic friction between the block & wall is 0.54, Calcu..
Cowboy joe wishes to shoot his assaiat by ricocheting a bullet off a mirrored metal plate. To do so, must he simply aim at the mirrored image of his assaiant? Explain.
An emf is induced in a conducting loop of wire 1.16 m long as its shape is changed from square to circular.
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