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1.在倾角θ=30°的斜坡上某处A,以初速度V_0=20米/秒沿水平方向抛出一个小球。这个小球将落在斜坡上什么地方?(设斜坡足够长) 2.如果在倾角θ=30°的斜坡上A处以与水平方向成α=60°的角向山坡下抛出一个小球,初速度V_0=20米/秒,那么这个小球将落在斜坡上什么地方? 3.一架敌机在离地面h=2000米的高空沿水平方向向我炮兵阵地飞来。如果炮兵将炮弹的发射方向调节在与水平面成α=60°
1. At a point A on the slope with inclination θ=30°, a small ball is thrown in the horizontal direction at an initial velocity of V_0=20 m/s. What is the place where the ball will land on the slope? (if the slope is long enough) 2. If a ball is thrown below the hillside at an angle of α=60° from the horizontal direction at the slope of θ=30°, At an initial speed of V_0=20m/s, where will the ball fall on the slope? 3. A hostile plane will fly horizontally towards the artillery position at an altitude of h=2000m above the ground. If the artillery adjusts the projectile’s launch direction to α=60° to the horizontal plane