The following is a description of the properties of several physical quantities and their units, of which the correct one is_______
A. Gravity is a vector, the unit is N, 1 N=1 kg·m/s²
B. Work is a vector, the unit is J, 1 J=1 kg·m² /s²
C. Power is a scalar quantity in W, 1 W = 1 N m/s
D. Both A and C
Answer:D
The following is a description of the properties of several physical quantities and their units, of which the correct one is_______
A. Gravity is a vector, the unit is N, 1 N=1 kg·m/s² B. Work is a vector, the unit is J, 1 J=1 kg·m² /s² C. Power is a scalar quantity in W, 1 W = 1 N m/s D. Both A and C