JAMB Physics 2007 Objective — Question 46
Question 46 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2007 Objective paper, with the correct answer and a full explanation.
Advertisement
A machine has a velocity ratio of 4. If it requires 800N to overcome a load of 1600N, what is the efficiency of the machine?
- A. 2%
- B. 40%
- C. 50%Correct
- D. 60%
Explanation
Mechanical Advantage = Load/Effort = 1600/800 = 2. Efficiency = (MA/VR) x 100% = (2/4) x 100% = 50%.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.