Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 480 · 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 smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
2. 2.True or false: a grippy rubber sole gives more friction. (a) False (b) True
3. 3.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
4. 4.💪 A force is a … (a) unit of time (b) kind of colour (c) push or a pull (d) type of sound
5. 5.💪 Which force is at work: pedalling a cycle? (a) gravity (b) friction (c) muscular force (d) magnetic force
6. 6.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) farther from the pivot (d) anywhere
7. 7.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
8. 8.Which of these is caused by gravity? (a) an apple falls down (b) a fridge magnet sticks (c) a magnet picks up pins (d) a rolling ball slows
9. 9.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
10. 10.🛞 How can we reduce friction in a machine? (a) press parts harder (b) add sand (c) oil the moving parts (d) make parts rough
11. 11.True or false: a wet tiled floor gives less friction. (a) False (b) True
12. 12.⚖️ A lever bar balances. The load is 270 N at 50 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
13. 13.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 240 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
15. 15.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
16. 16.⚖️ A lever bar balances. The load is 700 N at ? cm from the fulcrum. The effort is 100 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
17. 17.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
18. 18.Which of these is a pulley? (a) the tip of a nail (b) a well-bucket rope wheel (c) a knife edge (d) a seesaw
19. 19.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
20. 20.🏋️ A force of 80 N pushes a cart 6 m along the floor. How much work is done, in joules?
21. 21.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) True (b) False
22. 22.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
23. 23.True or false: a movable pulley is on a flagpole top. (a) True (b) False
24. 24.⚖️ A lever bar balances. The load is 70 N at 10 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
25. 25.🔍 Which is the odd one out? (a) a seesaw (b) a crowbar (c) a claw hammer on a nail (d) a door stopper
26. 26.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
27. 27.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
28. 28.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
29. 29.⚖️ A seesaw balances. Zoya (160 N) sits 1 m from the pivot on one side; Ravi (160 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
30. 30.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Meena (600 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
32. 32.Which of these is caused by gravity? (a) shoes grip the floor (b) rubbing hands warms them (c) a rolling ball slows (d) a river flows downhill
33. 33.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Meena (400 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
34. 34.True or false: a crane hook block is a pulley. (a) True (b) False
35. 35.True or false: a movable pulley only changes direction. (a) True (b) False
36. 36.⚖️ Turning effect = force × … (a) distance from fulcrum (b) colour of bar (c) mass of fulcrum (d) time taken
37. 37.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
38. 38.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
39. 39.🔍 Which is the odd one out? (a) skating on ice (b) sand on a slippery path (c) a box pushed on carpet (d) chalk on a gym bar
40. 40.⚖️ 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 1 (b) class 2 (c) class 3

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