Back to: PRIMARY SEVEN P7 SCIENCE TOPICAL QUESTIONS AND ANSWERS
Mechanical Advantage
Qn. What is mechanical advantage?
- Mechanical advantage is the number of times a machine eases work. OR
- Mechanical advantage is the radio of the load to the effort.
Note:
- Mechanical advantage has no units because it is a ratio of forces.
- If mechanical advantage is greater than I, less effort is used.
- It mechanical advantage is less than I, more effort is used.
Qn. Mention the force that affects the efficiency of the mechanical advantage of a machine. - Friction
Calculations of mechanical advantage.
- Calculate the mechanical advantages of a boy who carries a bucket of water of 400N using a force of 100N.
Solution
The see saw simplifies work 20 times.
- What will be the load if the mechanical advantage of a machine is 2 and the effort is 30N?
Solution:
Thanks
Nice work seen , l forward
Very good notes and well detailed.