A particle is projected with speed 15 ms-' at an angle of 40 above the horizontal from a point on horizontal ground. Calculate the time taken for the particle to hit the ground. 相关知识点: 试题来源: 解析 1.930=(15sin40°)t-gt^2/2 t=1.93 ...
Velocity = (speed) = 6((2 hati+2hatj -hatk))/(sqrt(4+4+1))=(4 hati+4 hatj-2 hatk) units.
百度试题 结果1 题目A particle moves in a straight line. Its speed is inversely proportional to time. Its acceleration 相关知识点: 试题来源: 解析 proportional to speed 反馈 收藏
5. A particle P is projected vertically upwards from a point A with speed a ms'. The point A is 17.5 m above horizontal ground. The particle P moves freely under gravity until it reaches the ground with speed 28 m s.(a)Show that =21(3)At time t seconds after projection, P is 19...
4. A particle P of mass 2m is moving in a straight line with speed u on a smooth horizontal plane. The particle P collides directly with a particle Q, of mass m, which is moving on the plane along the same straight line as P but in the opposite direction to P. Immediately before...
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Step by step video, text & image solution for A particle of mass m moving in the x direction with speed 2v is hit by another particle of mass 2m moving in they y direction with speed v. If the collision is perfectly inelastic, the percentage loss in the energy during the collision is...
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