The unit of weight is the:
A. Kilogram
B. Newton
C. Watt
D. Kilowatt
查看答案
Weight is the result of:
A. The force on mass due to gravity
B. The action of a falling mass
C. How much matter the object contains
D. The rate of mass per unit area
If a force is applied to a mass and the mass does not move:
A. Work is done even though there is no movement of the mass
B. Work is done only if the mass moves a long way
C. Power is exerted, but no work is done
D. No work is done
The unit of work is called the:
A. Pascal
B. Joule
C. Watt
D. Kilogram
The unit of power is called the:
A. Joule
B. Newton-metre
C. Watt
D. Metre per second
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