Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 235 · 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.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) closer to the pivot (d) anywhere
2. 2.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) glass (d) polished marble
3. 3.💪 A box weighs 10 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
4. 4.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 2 (b) class 1 (c) class 3
5. 5.💪 A box weighs 210 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
6. 6.True or false: a seesaw is a class 2 lever (load in the middle). (a) False (b) True
7. 7.⚖️ Which class of lever is a broom when sweeping? (a) class 1 (b) class 3 (c) class 2
8. 8.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
9. 9.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
10. 10.Which of these is a wedge? (a) a seesaw (b) a round doorknob (c) a knife edge (d) a jar lid
11. 11.🛞 Rubbing your hands fast makes them … (a) warm (b) wet (c) magnetic (d) cold
12. 12.🔍 Which is the odd one out? (a) a seesaw (b) an axe blade (c) a bottle opener (d) a nutcracker
13. 13.True or false: a tug of war is a pull. (a) True (b) False
14. 14.⚙️ Which simple machine is a seesaw? (a) wheel and axle (b) lever (c) wedge (d) inclined plane
15. 15.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
16. 16.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
18. 18.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 4 N, sandpaper 5 N. How many newtons more were needed on sandpaper than on ice?
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
22. 22.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
23. 23.🪝 A load of 400 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
25. 25.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 3 (c) class 2
26. 26.💪 A box weighs 450 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
27. 27.⚙️ Which simple machine is a well-bucket rope wheel? (a) pulley (b) screw (c) inclined plane (d) wheel and axle
28. 28.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) stop it moving (d) change its colour
29. 29.True or false: a chisel is a pulley. (a) False (b) True
30. 30.True or false: a movable pulley is on a flagpole top. (a) True (b) False
31. 31.💪 A box weighs 70 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
32. 32.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 1 (c) class 2
33. 33.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
34. 34.Which of these is a wedge? (a) a claw hammer on a nail (b) an axe blade (c) a flagpole rope wheel (d) a wood screw
35. 35.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
36. 36.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Kabir (640 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 10 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
39. 39.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the load (c) the effort (d) the fulcrum
40. 40.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful

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