Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 236 · 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 opening a drawer a push or a pull? (a) a pull (b) a push
2. 2.Which of these is a pulley? (a) a truck loading ramp (b) a crowbar (c) a screw jack (d) a window blind cord
3. 3.True or false: skating on ice gives more friction. (a) False (b) True
4. 4.🏋️ A force of 80 N pushes a cart 7 m along the floor. How much work is done, in joules?
5. 5.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
6. 6.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
7. 7.⚖️ A seesaw balances. Meena (200 N) sits ? m from the pivot on one side; Asha (200 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
8. 8.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
9. 9.True or false: a tyre with deep treads gives more friction. (a) True (b) False
10. 10.🏋️ A force of 380 N did 2660 J of work. How many metres did the object move?
11. 11.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
12. 12.Which of these is caused by friction? (a) a river flows downhill (b) pedalling a cycle (c) rubbing hands warms them (d) a compass needle turns
13. 13.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) two ramps back to back (d) a bar on a pivot
14. 14.Which of these is a wedge? (a) a screw jack (b) a seesaw (c) a wood screw (d) a chisel
15. 15.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
16. 16.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
17. 17.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a ramp wrapped round (d) a kind of wheel
18. 18.🔍 Which is the odd one out? (a) a wet tiled floor (b) a wheel on ball bearings (c) chalk on a gym bar (d) powder on a carrom board
19. 19.Which of these is a wedge? (a) a screw jack (b) a jar lid (c) a round doorknob (d) a door stopper
20. 20.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 12 (d) 6
21. 21.🏋️ A force of 80 N pushes a cart 2 m along the floor. How much work is done, in joules?
22. 22.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) wet (d) cold
23. 23.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the fulcrum (c) far from the fulcrum (d) on the rock
24. 24.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Meena (760 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
26. 26.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
27. 27.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
28. 28.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 3 N, a wooden plank 4 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
30. 30.⚖️ A lever bar balances. The load is 900 N at 30 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?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 11 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
32. 32.⚖️ A seesaw balances. Arjun (380 N) sits 1 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
33. 33.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 90 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
36. 36.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 70 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
37. 37.True or false: a tug of war is a push. (a) True (b) False
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 20 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
39. 39.True or false: a door stopper is a wedge. (a) False (b) True
40. 40.🪝 A load of 400 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)

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