Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 946 · 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.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
2. 2.💪 Which force is at work: a magnet picks up pins? (a) magnetic force (b) friction (c) muscular force (d) gravity
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 9 N, ice 1 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on ice?
4. 4.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
5. 5.True or false: a wet tiled floor gives more friction. (a) True (b) False
6. 6.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
7. 7.🪝 A well winch has a handle (wheel) of radius 28 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
8. 8.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 1 (c) class 3
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
10. 10.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
11. 11.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 3 (c) class 1
13. 13.True or false: a wheelchair ramp is an inclined plane. (a) False (b) True
14. 14.True or false: a water tap handle is a wheel and axle. (a) False (b) True
15. 15.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 10 (c) 6 (d) 3
16. 16.⚙️ A wedge is … (a) a rope on a wheel (b) two ramps back to back (c) a wheel on a rod (d) a bar on a pivot
17. 17.Which of these is an inclined plane? (a) a knife edge (b) an axe blade (c) a road up a hill (d) a bottle opener
18. 18.🪝 A pulley system lifts an 870 N load with an effort of 290 N. What is its mechanical advantage (MA)?
19. 19.⚙️ Which simple machine is an axe blade? (a) wedge (b) wheel and axle (c) inclined plane (d) pulley
20. 20.True or false: a wood screw is a wheel and axle. (a) True (b) False
21. 21.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) on the fulcrum (d) far from the fulcrum
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a glass sheet 6 N, a wooden plank 9 N. How many newtons more were needed on sandpaper than on ice?
23. 23.True or false: a rough doormat gives less friction. (a) True (b) False
24. 24.⚖️ 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 2 (c) class 1
25. 25.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
26. 26.⚖️ Which class of lever is a lemon squeezer? (a) class 2 (b) class 1 (c) class 3
27. 27.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
28. 28.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
29. 29.⚙️ Which simple machine is a chisel? (a) pulley (b) inclined plane (c) wheel and axle (d) wedge
30. 30.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
31. 31.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
32. 32.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.⚙️ Which simple machine is a window blind cord? (a) wheel and axle (b) lever (c) pulley (d) inclined plane
34. 34.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
35. 35.True or false: skating on ice gives more friction. (a) True (b) False
36. 36.🪝 A load of 640 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
37. 37.Which of these is caused by magnetic force? (a) rubbing hands warms them (b) shoes grip the floor (c) an apple falls down (d) a compass needle turns
38. 38.⚖️ A seesaw balances. Kabir (120 N) sits ? m from the pivot on one side; Ravi (360 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
39. 39.🏋️ Pushing a crate 7 m took 770 J of work. What force was used, in newtons?
40. 40.Which of these is caused by gravity? (a) pedalling a cycle (b) brakes stop a bicycle (c) rain falls to the ground (d) a compass needle turns

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