Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 357 · 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 390 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
3. 3.⚖️ A seesaw balances. Asha (510 N) sits 3 m from the pivot on one side; Kabir (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
5. 5.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) nothing
6. 6.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
7. 7.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
8. 8.Which of these is a wedge? (a) a road up a hill (b) a knife edge (c) a water tap handle (d) a wood screw
9. 9.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) closer to the pivot (c) anywhere (d) on the pivot
10. 10.⚙️ Which simple machine is a bottle opener? (a) wedge (b) inclined plane (c) screw (d) lever
11. 11.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
12. 12.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
13. 13.⚙️ Which simple machine is a claw hammer on a nail? (a) pulley (b) screw (c) lever (d) wheel and axle
14. 14.🪝 A load of 1120 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
15. 15.🏋️ A force of 160 N did 1120 J of work. How many metres did the object move?
16. 16.⚖️ A lever bar balances. The load is 50 N at 10 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, a glass sheet 1 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
18. 18.⚙️ Which simple machine is a seesaw? (a) lever (b) inclined plane (c) wheel and axle (d) screw
19. 19.⚖️ A lever bar balances. The load is 720 N at 10 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 3 (c) class 1
21. 21.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 80 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
23. 23.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
25. 25.🏋️ Pushing a crate 3 m took 1290 J of work. What force was used, in newtons?
26. 26.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
27. 27.🛞 How can we reduce friction in a machine? (a) make parts rough (b) oil the moving parts (c) add sand (d) press parts harder
28. 28.⚙️ A wedge is … (a) a rope on a wheel (b) a bar on a pivot (c) a wheel on a rod (d) two ramps back to back
29. 29.True or false: a grippy rubber sole gives more friction. (a) True (b) False
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
31. 31.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
32. 32.Which of these is a pulley? (a) a window blind cord (b) a claw hammer on a nail (c) a seesaw (d) a jar lid
33. 33.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
34. 34.Which of these is a screw? (a) a steering wheel (b) a wheelchair ramp (c) a jar lid (d) a flagpole rope wheel
35. 35.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) sand on a slippery path (d) a box pushed on carpet
36. 36.🏋️ A force of 180 N pushes a cart 9 m along the floor. How much work is done, in joules?
37. 37.⚙️ Which simple machine is a chisel? (a) lever (b) wedge (c) pulley (d) wheel and axle
38. 38.💪 Which can a force NOT do? (a) change its shape (b) stop it moving (c) start it moving (d) change its colour
39. 39.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
40. 40.Which of these is a wedge? (a) a bottle opener (b) a well winch handle (c) a chisel (d) a jar lid

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