Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 802 · 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 halves the effort. (a) True (b) False
2. 2.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
3. 3.🪝 A bucket weighing 490 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
4. 4.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) farther from the pivot (d) closer to the pivot
5. 5.💪 A cart is pulled to the right with 35 N and to the left with 45 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
6. 6.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
7. 7.True or false: a fixed pulley needs effort = load. (a) True (b) False
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 30 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
9. 9.💪 Two children push a box to the right, one with 40 N and the other with 20 N. What is the net (total) force on the box, in newtons?
10. 10.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
11. 11.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
12. 12.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
13. 13.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
14. 14.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
15. 15.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
16. 16.🏋️ A force of 330 N pushes a cart 9 m along the floor. How much work is done, in joules?
17. 17.Which of these is a screw? (a) a nut and bolt (b) a bottle opener (c) a seesaw (d) a crowbar
18. 18.🪝 A bucket weighing 420 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
19. 19.True or false: a movable pulley only changes direction. (a) True (b) False
20. 20.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 40 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.True or false: a knife edge is an inclined plane. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) a jar lid (b) a wheelchair ramp (c) a road up a hill (d) a truck loading ramp
23. 23.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
24. 24.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
25. 25.🔍 Which is the odd one out? (a) a rough doormat (b) a box pushed on carpet (c) a grippy rubber sole (d) a smooth steel slide
26. 26.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) wind (d) magnetism
27. 27.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a wet tiled floor (c) chalk on a gym bar (d) oil on a squeaky hinge
28. 28.⚙️ Which simple machine is a bottle opener? (a) wedge (b) inclined plane (c) pulley (d) lever
29. 29.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) glass (d) ice
30. 30.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
31. 31.🛞 Why are tyres made with deep treads? (a) to look nice (b) to save rubber (c) to grip the road (d) to go slower
32. 32.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
33. 33.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
34. 34.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
35. 35.🪝 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)
36. 36.True or false: a crowbar is a class 3 lever (effort in the middle). (a) True (b) False
37. 37.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 3 (c) class 2
38. 38.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
39. 39.⚙️ Which simple machine is a bottle cap? (a) pulley (b) lever (c) screw (d) inclined plane
40. 40.True or false: a water tap handle is an inclined plane. (a) False (b) True

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