Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 362 · 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 box weighs 370 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its shape (d) change its colour
3. 3.⚖️ A lever bar balances. The load is 300 N at 40 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
4. 4.⚙️ Which simple machine is a door stopper? (a) wedge (b) pulley (c) wheel and axle (d) lever
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
6. 6.🪝 A bucket weighing 500 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
7. 7.💪 A bag has a mass of 20 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
8. 8.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
9. 9.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
10. 10.💪 A force is a … (a) unit of time (b) type of sound (c) push or a pull (d) kind of colour
11. 11.⚙️ Which simple machine is a claw hammer on a nail? (a) wedge (b) screw (c) pulley (d) lever
12. 12.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
13. 13.True or false: a chisel is a wedge. (a) False (b) True
14. 14.🏋️ A force of 100 N did 900 J of work. How many metres did the object move?
15. 15.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 6 (c) 3 (d) 10
16. 16.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 500 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.🛞 Friction acts … (a) with the motion (b) only upwards (c) against the motion (d) only on ice
18. 18.True or false: a knife edge is an inclined plane. (a) False (b) True
19. 19.True or false: pulling up your socks is a push. (a) True (b) False
20. 20.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
21. 21.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
22. 22.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
23. 23.True or false: a grippy rubber sole gives more friction. (a) True (b) False
24. 24.⚙️ Which simple machine is a bottle cap? (a) lever (b) wedge (c) inclined plane (d) screw
25. 25.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
26. 26.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
27. 27.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the load (c) the fulcrum (d) the effort
28. 28.🏋️ A force of 170 N pushes a cart 2 m along the floor. How much work is done, in joules?
29. 29.True or false: opening a drawer is a push. (a) True (b) False
30. 30.🪝 A load of 40 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
31. 31.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Meena (200 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
33. 33.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 1 (c) class 3
34. 34.🪝 A load of 210 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
35. 35.💪 Two children push a box to the right, one with 5 N and the other with 75 N. What is the net (total) force on the box, in newtons?
36. 36.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
37. 37.🔍 Which is the odd one out? (a) skating on ice (b) sand on a slippery path (c) a rough doormat (d) a tyre with deep treads
38. 38.⚖️ A lever bar balances. The load is 70 N at ? cm from the fulcrum. The effort is 50 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a carpet 7 N, sandpaper 10 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
40. 40.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 1 (c) class 3

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