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【单选题】

A food shipper pushes a wood crate (板条箱) of cabbage heads (包心菜) ( total mass m = 14kg) across a concrete floor with constant horizontal force F of magnitude 40N. In a straight-line displacement of magnitude d = 0.50m, the speed of the crate decreases from v 0 = 0.60m/s to v = 0.20m/s. How much work is done by force F in J?

A.
10J
B.
15J
C.
20J
题目标签：板条箱
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【简答题】B Yes. It’s really happening. This is the last weekend that Washington D.C.’s beloved giant panda, Tai Shan (aka Butterstick), has resided at the National Zoo. Born in Washtington D.C. four and a half...
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【单选题】A food shipper pushes a wood crate (板条箱) of cabbage heads (包心菜) ( total mass m = 14kg) across a concrete floor with constant horizontal force F of magnitude 40N. In a straight-line displacement of mag...
A.
12J
B.
22J
C.
5J
查看完整题目与答案

【简答题】板条箱
查看完整题目与答案

【简答题】B Yes. It’s really happening. This is the last weekend that Washington D.C.’s beloved giant panda, Tai Shan (aka Butterstick), has resided at the National Zoo. Born in Washtington D.C. four and a half...
查看完整题目与答案

【单选题】A food shipper pushes a wood crate (板条箱) of cabbage heads (包心菜) ( total mass m = 14kg) across a concrete floor with constant horizontal force F of magnitude 40N. In a straight-line displacement of mag...
A.
10J
B.
15J
C.
20J
查看完整题目与答案