Question

1. - / 1 points which of the following are the correct units for power? choose all that apply. kg·m/s cal kg·m²/s² w j j·s kg·m/s² kw

Explanation:

• Power is defined as the rate of doing work. The SI unit of power is the watt (\(W\)), and \(1\ kW = 1000\ W\).
• Let's analyze other units:
• \(kg\cdot m/s\) is the unit of momentum.
• \(cal\) (calorie) is a unit of energy.
• \(kg\cdot m^{2}/s^{2}\) is the unit of energy (since \(1\ J= 1\ kg\cdot m^{2}/s^{2}\)).
• \(J\) (joule) is the unit of energy.
• \(J\cdot s\) has no physical significance as a unit for power.
• \(kg\cdot m/s^{2}\) is the unit of force (\(F = ma\), where \(m\) is in \(kg\), \(a\) is in \(m/s^{2}\)).

Answer:

W, kW