PH-618
Principle of moments
Physics · Secondary 3 · Easy · Principle of moments
A helicopter of weight 180 kN is hovering at rest. The front rotor provides an upward lift of 70 kN. What is the upward lift provided by the back rotor?
- 70 kN
- 90 kN
- 110 kN
- 250 kN
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.