本题目来源于试卷: Physics Unit9: Static Equilibrium, Elasticity and Fracture，类别为 国际高中通用物理
[单选题]
Suppose that an 80-kg personc 5 ;0+;moy*hvqdl ruf walki svg-lxecu i6j83:+ hgl 1cdtnu)*rnz.m .lg4ng on crutches supports all his weight on the two crutch tips, each of which is is4: 8nmellcu6 +g1-v)g d.nu3 x.j*zclthg rcircular with a diameter of 4.0 cm. What pressure is exerted on the floor?
A. $78 \; kPa$
B. $156 \; kPa$
C. $312 \; kPa$
D. $624 \; kPa$
参考答案: C
本题详细解析:
暂无
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