Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 660 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

1. 1.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
2. 2.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
3. 3.⚖️ A lever bar balances. The load is 360 N at 30 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
4. 4.💪 Two children push a box to the right, one with 25 N and the other with 10 N. What is the net (total) force on the box, in newtons?
5. 5.⚙️ Which simple machine is a bottle cap? (a) pulley (b) wheel and axle (c) screw (d) wedge
6. 6.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
7. 7.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the fulcrum moves (d) the bar is short
8. 8.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
10. 10.True or false: a smooth steel slide gives less friction. (a) True (b) False
11. 11.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) balanced (c) unbalanced (d) doubled
12. 12.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) on the pivot (d) anywhere
13. 13.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
14. 14.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
15. 15.🪝 More rope sections holding a load means … (a) more effort needed (b) less effort needed (c) the load floats (d) no change
16. 16.⚖️ A seesaw balances. Zoya (380 N) sits 1 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.⚙️ Which simple machine is a claw hammer on a nail? (a) lever (b) inclined plane (c) pulley (d) screw
18. 18.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
19. 19.💪 Which force is at work: rain falls to the ground? (a) friction (b) magnetic force (c) muscular force (d) gravity
20. 20.🪝 A load of 450 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
21. 21.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
23. 23.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?
24. 24.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) False (b) True
25. 25.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the axle (d) the load
26. 26.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
27. 27.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
28. 28.True or false: a playground slide is a wheel and axle. (a) True (b) False
29. 29.💪 A box weighs 40 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
30. 30.⚖️ A seesaw balances. Arjun (390 N) sits ? m from the pivot on one side; Zoya (390 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
31. 31.True or false: a fishing rod is a class 2 lever (load in the middle). (a) True (b) False
32. 32.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) True (b) False
33. 33.⚖️ A lever bar balances. The load is 270 N at 40 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
34. 34.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
35. 35.🏋️ A force of 20 N did 20 J of work. How many metres did the object move?
36. 36.Which of these is a lever? (a) a claw hammer on a nail (b) a truck loading ramp (c) a steering wheel (d) a jar lid
37. 37.🪝 A pulley system lifts a 440 N load with an effort of 220 N. What is its mechanical advantage (MA)?
38. 38.True or false: hitting a cricket ball is a pull. (a) False (b) True
39. 39.True or false: a seesaw is a class 3 lever (effort in the middle). (a) False (b) True
40. 40.💪 A force is a … (a) type of sound (b) unit of time (c) push or a pull (d) kind of colour

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