Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 69 · 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.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) closer to the pivot (c) anywhere (d) on the pivot
2. 2.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
3. 3.🪝 A load of 320 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
4. 4.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) newton (N) (d) litre (L)
5. 5.🔍 Which is the odd one out? (a) a nutcracker (b) an axe blade (c) a seesaw (d) a bottle opener
6. 6.True or false: chalk on a gym bar gives more friction. (a) False (b) True
7. 7.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
8. 8.💪 A cart is pulled to the right with 80 N and to the left with 95 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
9. 9.Which of these is caused by gravity? (a) brakes stop a bicycle (b) a rolling ball slows (c) squeezing a lemon (d) an apple falls down
10. 10.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
11. 11.⚖️ A lever bar balances. The load is 280 N at 10 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
12. 12.🏋️ Pushing a crate 5 m took 1900 J of work. What force was used, in newtons?
13. 13.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 3 (c) class 1
14. 14.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
15. 15.💪 A cart is pulled to the right with 95 N and to the left with 95 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 2 N, a glass sheet 6 N, a wooden plank 9 N. How many newtons more were needed on sandpaper than on ice?
17. 17.🏋️ A force of 460 N did 2300 J of work. How many metres did the object move?
18. 18.⚖️ What is the pivot point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
19. 19.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the load (c) the effort (d) the fulcrum
20. 20.💪 Which force is at work: a magnet picks up pins? (a) magnetic force (b) muscular force (c) gravity (d) friction
21. 21.⚙️ A wedge is … (a) a wheel on a rod (b) a bar on a pivot (c) a rope on a wheel (d) two ramps back to back
22. 22.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the fulcrum (c) nothing (d) the load
23. 23.🔍 Which is the odd one out? (a) a jar lid (b) a nut and bolt (c) a screw jack (d) a door stopper
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 9 N, sandpaper 10 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
25. 25.🪝 A well winch has a handle (wheel) of radius 32 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
26. 26.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the bar is short (d) the fulcrum moves
27. 27.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
28. 28.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
29. 29.💪 A bag has a mass of 9 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
30. 30.💪 Which can a force NOT do? (a) change its colour (b) stop it moving (c) start it moving (d) change its shape
31. 31.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) a grippy rubber sole (d) skating on ice
32. 32.🪝 A pulley system lifts a 760 N load with an effort of 190 N. What is its mechanical advantage (MA)?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 5 N, a wooden plank 8 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
34. 34.🏋️ A force of 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
35. 35.💪 A cart is pulled to the right with 20 N and to the left with 5 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
36. 36.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
37. 37.🪝 A winch has a wheel of radius 5 cm and an axle of radius 1 cm. What effort on the wheel lifts a 100 N bucket on the axle, in newtons? (ideal)
38. 38.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
39. 39.🔍 Which is the odd one out? (a) a crane hook block (b) a flagpole rope wheel (c) a bottle opener (d) a well-bucket rope wheel
40. 40.True or false: opening a drawer is a pull. (a) False (b) True

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