北京通州区2014-2015学年高二春季会考考前练习物理试题
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3．F1、F2是两个互相垂直的共点力，其中F1 = 40 N、F2 = 30 N．这两个力合力的大小为
A．20 N B．30 N C．50N D．150 N
4．弹簧的劲度系数为k. 当弹簧伸长了x时（弹簧的形变在弹性限度内），弹簧对小球的弹力大小为
A． B． C． D．kx
5．下列运动中，物体做匀变速直线运动的是
A．自由落体运动 B．匀速圆周运动 C．匀速直线运动 D．平抛运动...点击查看全部>>
A．20 N B．30 N C．50N D．150 N
4．弹簧的劲度系数为k. 当弹簧伸长了x时（弹簧的形变在弹性限度内），弹簧对小球的弹力大小为
A． B． C． D．kx
5．下列运动中，物体做匀变速直线运动的是
A．自由落体运动 B．匀速圆周运动 C．匀速直线运动 D．平抛运动...点击查看全部>>
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