Physics Practice: Simple Machines (Mock Test 5 - Ultimate Comprehensive)
1. A simple machine helps us by changing the ________ of the force applied.
2. In a Class I lever, the Mechanical Advantage can be:
3. Which of the following is a second-class lever?
4. The point where a lever pivots is called the ________.
5. A single movable pulley gives a Mechanical Advantage of approximately ________.
6. A screw is a modified ________ wrapped around a rod.
7. To lift a heavy rock using a crowbar, you should place the fulcrum ________ the rock.
8. Which of these is a Class III lever used in the kitchen?
9. Efficiency of a machine is defined as ________.
10. The distance between the effort and the fulcrum is called the ________.
11. A crane uses a combination of several pulleys known as a ________.
12. For an ideal machine, the value of Mechanical Advantage is ________ the Velocity Ratio.
13. Which of the following is an example of a wheel and axle?
14. A knife blade is an example of which simple machine?
15. In Class III levers, we gain ________ but lose ________.
16. Maintenance of machines involves ________ to prevent rusting and friction.
17. A see-saw is a ________ class lever.
18. If a machine has an $MA < 1$, it is used to ________.
19. Which simple machine is used in a jack-screw to lift a car?
20. The efficiency of a real machine is always ________.