Một xe đua tăng tốc từ 10 m/s đến 50 m/s trên quãng đường dài
120 m. Thời gian tăng tốc là...
Physics, 08.09.2021 08:00 allisonmoon9012
Một xe đua tăng tốc từ 10 m/s đến 50 m/s trên quãng đường dài
120 m. Thời gian tăng tốc là
Answers: 2
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If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.
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Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.
Answers: 1
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