Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 577 · 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 bag has a mass of 29 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
2. 2.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
3. 3.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
4. 4.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wet tiled floor (c) chalk on a gym bar (d) a tyre with deep treads
5. 5.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) distance from fulcrum (d) mass of fulcrum
6. 6.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
7. 7.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) closer to the pivot (d) anywhere
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
9. 9.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
10. 10.⚙️ Which simple machine is a nut and bolt? (a) wheel and axle (b) wedge (c) pulley (d) screw
11. 11.⚖️ Which class of lever is a pair of tweezers? (a) class 2 (b) class 3 (c) class 1
12. 12.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) turning effects match (d) the fulcrum moves
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, sandpaper 9 N, ice 4 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
14. 14.True or false: a wood screw is a pulley. (a) True (b) False
15. 15.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 2 (c) class 1
16. 16.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
17. 17.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
18. 18.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
19. 19.Which of these is a screw? (a) the tip of a nail (b) a claw hammer on a nail (c) a jar lid (d) an axe blade
20. 20.💪 Two children push a box to the right, one with 5 N and the other with 100 N. What is the net (total) force on the box, in newtons?
21. 21.🏋️ A 13 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 bucket weighing 400 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
23. 23.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) a tyre with deep treads (d) chalk on a gym bar
24. 24.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.🔍 Which is the odd one out? (a) a screw jack (b) a seesaw (c) a claw hammer on a nail (d) a crowbar
26. 26.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 1 (c) class 2
27. 27.⚙️ Which simple machine is a steering wheel? (a) lever (b) wheel and axle (c) inclined plane (d) wedge
28. 28.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
29. 29.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a window blind cord (c) a chisel (d) a flagpole rope wheel
30. 30.🪝 A winch has a wheel of radius 2 cm and an axle of radius 1 cm. What effort on the wheel lifts a 220 N bucket on the axle, in newtons? (ideal)
31. 31.True or false: a well-bucket rope wheel is an inclined plane. (a) True (b) False
32. 32.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a crane hook block (c) a window blind cord (d) an axe blade
34. 34.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 2 (c) class 1
35. 35.⚖️ What is the pivot point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
36. 36.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
37. 37.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 5 N, a carpet 6 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on ice?
39. 39.🏋️ Pushing a crate 7 m took 3290 J of work. What force was used, in newtons?
40. 40.🔍 Which is the odd one out? (a) a seesaw (b) a truck loading ramp (c) a playground slide (d) a road up a hill

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