Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 647 · 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.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
2. 2.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Asha (400 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) a rough doormat (d) sand on a slippery path
4. 4.True or false: drawing up a well bucket is a push. (a) True (b) False
5. 5.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
6. 6.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the effort (c) the load (d) the fulcrum
7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
8. 8.True or false: chalk on a gym bar gives less friction. (a) True (b) False
9. 9.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
10. 10.⚙️ A screw is really … (a) a bent lever (b) a kind of wheel (c) a ramp wrapped round (d) a tiny pulley
11. 11.⚖️ A seesaw balances. Asha (540 N) sits ? m from the pivot on one side; Kabir (360 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
12. 12.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
13. 13.🔍 Which is the odd one out? (a) a crowbar (b) a well-bucket rope wheel (c) a seesaw (d) a nutcracker
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a glass sheet 5 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
15. 15.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
16. 16.💪 In a tug of war, one team pulls right with 70 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
17. 17.💪 A bag has a mass of 48 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
18. 18.True or false: pressing a doorbell is a push. (a) True (b) False
19. 19.⚙️ Which simple machine is a door stopper? (a) wedge (b) screw (c) pulley (d) wheel and axle
20. 20.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the axle (d) the load
21. 21.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 12 N, ice 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
23. 23.True or false: a movable pulley rises with the load. (a) True (b) False
24. 24.⚙️ A wedge is … (a) a rope on a wheel (b) two ramps back to back (c) a wheel on a rod (d) a bar on a pivot
25. 25.Which of these is a lever? (a) the tip of a nail (b) a truck loading ramp (c) a crowbar (d) a road up a hill
26. 26.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
27. 27.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
28. 28.🛞 Why are tyres made with deep treads? (a) to look nice (b) to save rubber (c) to grip the road (d) to go slower
29. 29.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
30. 30.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
31. 31.🪝 A load of 600 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
32. 32.⚙️ Which simple machine is a window blind cord? (a) wheel and axle (b) screw (c) pulley (d) inclined plane
33. 33.True or false: a grippy rubber sole gives less friction. (a) True (b) False
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 13 N, ice 3 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
35. 35.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
36. 36.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
37. 37.💪 Which force is at work: a compass needle turns? (a) gravity (b) friction (c) magnetic force (d) muscular force
38. 38.True or false: pressing a doorbell is a pull. (a) True (b) False
39. 39.💪 Which force is at work: an apple falls down? (a) magnetic force (b) friction (c) muscular force (d) gravity
40. 40.⚖️ A seesaw balances. Arjun (110 N) sits 3 m from the pivot on one side; Asha (330 N) sits ? m from the pivot on the other side. What is the missing distance in metres?

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