Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 906 · 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, load, effort. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
2. 2.Which of these is a pulley? (a) a bottle opener (b) a truck loading ramp (c) a bottle cap (d) a window blind cord
3. 3.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a wet tiled floor (d) a box pushed on carpet
4. 4.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 110 cm and the load at 70 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
5. 5.💪 In a tug of war, one team pulls right with 45 N and the other pulls left with 10 N. What is the size of the net force, in newtons?
6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
7. 7.💪 In a tug of war, one team pulls right with 90 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 13 N, ice 4 N, a wooden plank 7 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
9. 9.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
10. 10.True or false: kicking a football is a pull. (a) True (b) False
11. 11.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
12. 12.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) wind (d) magnetism
13. 13.True or false: a seesaw is a class 3 lever (effort in the middle). (a) True (b) False
14. 14.💪 In a tug of war, one team pulls right with 55 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
15. 15.True or false: a movable pulley is on a flagpole top. (a) False (b) True
16. 16.Which of these is caused by friction? (a) pedalling a cycle (b) squeezing a lemon (c) a river flows downhill (d) rubbing hands warms them
17. 17.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 3 (c) class 2
18. 18.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) a rough doormat (d) oil on a squeaky hinge
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a wooden plank 6 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
20. 20.Which of these is a lever? (a) a bottle cap (b) a crowbar (c) a road up a hill (d) a chisel
21. 21.🪝 A load of 580 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
22. 22.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) magnetic force (c) muscular force (d) friction
23. 23.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
24. 24.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
25. 25.Which of these is caused by muscular force? (a) brakes stop a bicycle (b) pedalling a cycle (c) an apple falls down (d) shoes grip the floor
26. 26.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
27. 27.⚙️ 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
28. 28.Which of these is caused by friction? (a) a magnet picks up pins (b) a rolling ball slows (c) a river flows downhill (d) an apple falls down
29. 29.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) both weights are equal (d) the fulcrum moves
30. 30.Which of these is a screw? (a) a water tap handle (b) a wheelchair ramp (c) a crane hook block (d) a jar lid
31. 31.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) squeezing a lemon (c) rain falls to the ground (d) rubbing hands warms them
32. 32.💪 A force is a … (a) unit of time (b) kind of colour (c) type of sound (d) push or a pull
33. 33.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
34. 34.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) farther from the pivot (d) on the pivot
35. 35.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
37. 37.💪 A bag has a mass of 1 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
38. 38.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
39. 39.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 100 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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