(1) B, (2)ADE, (3)m 1 OB = m 1 OA + m 2 OC
(1)使得两小球碰撞后下落的水平距离便于测量
(2)我们要验证碰撞中动量守恒即:
而
,
必须测量,
=
,
=
=
,即
=
+
即m 1 OB = m 1 OA + m 2 OC 故必须测量的物理量为ADE
(3) 由(2)得m 1 OB = m 1 OA + m 2 OC
(1) B, (2)ADE, (3)m 1 OB = m 1 OA + m 2 OC
(1)使得两小球碰撞后下落的水平距离便于测量
(2)我们要验证碰撞中动量守恒即:
而
,
必须测量,
=
,
=
=
,即
=
+
即m 1 OB = m 1 OA + m 2 OC 故必须测量的物理量为ADE
(3) 由(2)得m 1 OB = m 1 OA + m 2 OC