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Q. A rifle bullet with a muzzle speed of 320m/s is fired directly into a special, dense material that stops the bullet in 36 cm. assume the bullet's deceleration to be constant, what is its magnitude?

Q. Two people stand 3 m in front of large plane mirror and space 5m a part in dark room at what angle of incidence should one of them shine a flashlight on the mirror so that reflected beam directly strickes the other person?

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