Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 13 · 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.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
2. 2.🏋️ A force of 180 N pushes a cart 5 m along the floor. How much work is done, in joules?
3. 3.⚖️ What is the pivot point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
4. 4.Which of these is a wheel and axle? (a) a water tap handle (b) a wheelchair ramp (c) a road up a hill (d) a window blind cord
5. 5.💪 Which can a force NOT do? (a) change its colour (b) stop it moving (c) change its shape (d) start it moving
6. 6.🪝 A bucket weighing 310 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
7. 7.True or false: pressing a doorbell is a pull. (a) False (b) True
8. 8.🛞 Rubbing your hands fast makes them … (a) magnetic (b) cold (c) wet (d) warm
9. 9.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
10. 10.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 8 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
12. 12.True or false: a nutcracker is a class 1 lever (fulcrum in the middle). (a) False (b) True
13. 13.⚖️ A seesaw balances. Kabir (240 N) sits ? m from the pivot on one side; Zoya (120 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
14. 14.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a crane hook block (c) a crowbar (d) a window blind cord
15. 15.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
16. 16.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 1 (c) class 2
17. 17.⚙️ Which simple machine is a well-bucket rope wheel? (a) inclined plane (b) lever (c) screw (d) pulley
18. 18.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) closer to the pivot (d) on the pivot
19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, a carpet 8 N, sandpaper 11 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
21. 21.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) the load floats (d) more effort needed
22. 22.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
23. 23.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
24. 24.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 2 (c) class 3
25. 25.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the load (c) the effort (d) the fulcrum
26. 26.🪝 A load of 300 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
27. 27.💪 Which force is at work: rubbing hands warms them? (a) gravity (b) muscular force (c) friction (d) magnetic force
28. 28.True or false: a wet tiled floor gives less friction. (a) True (b) False
29. 29.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
30. 30.💪 Which force is at work: a rolling ball slows? (a) muscular force (b) friction (c) magnetic force (d) gravity
31. 31.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
32. 32.Which of these is a wedge? (a) a playground slide (b) a knife edge (c) a nut and bolt (d) a flagpole rope wheel
33. 33.⚙️ A wedge is … (a) a rope on a wheel (b) a bar on a pivot (c) two ramps back to back (d) a wheel on a rod
34. 34.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
35. 35.⚖️ A lever bar balances. The load is 720 N at ? cm from the fulcrum. The effort is 360 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🪝 A pulley system lifts a 360 N load with an effort of 180 N. What is its mechanical advantage (MA)?
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 5 N, sandpaper 9 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 9 N, sandpaper 10 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
39. 39.Which of these is a pulley? (a) an axe blade (b) a nutcracker (c) a well-bucket rope wheel (d) a wood screw
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, ice 1 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice

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