Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 872 · 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.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
2. 2.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
3. 3.⚙️ Which simple machine is a nut and bolt? (a) inclined plane (b) wedge (c) lever (d) screw
4. 4.💪 Which force is at work: rubbing hands warms them? (a) muscular force (b) gravity (c) magnetic force (d) friction
5. 5.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a wooden plank 4 N, sandpaper 8 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
7. 7.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
8. 8.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 150 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
9. 9.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 4 N, sandpaper 5 N, ice 1 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) ice
11. 11.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
12. 12.True or false: your forearm is a class 2 lever (load in the middle). (a) True (b) False
13. 13.True or false: pushing a trolley is a pull. (a) False (b) True
14. 14.True or false: a jar lid is a screw. (a) True (b) False
15. 15.💪 Which force is at work: a river flows downhill? (a) friction (b) magnetic force (c) muscular force (d) gravity
16. 16.⚙️ Which simple machine is a chisel? (a) wheel and axle (b) wedge (c) inclined plane (d) lever
17. 17.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
18. 18.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
19. 19.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the fulcrum (c) the effort (d) the load
20. 20.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the fulcrum moves (d) the bar is short
21. 21.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
22. 22.True or false: a movable pulley stays in one place. (a) True (b) False
23. 23.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
24. 24.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Kabir (330 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.💪 In a tug of war, one team pulls left with 30 N and the other pulls right with 25 N. What is the size of the net force, in newtons?
26. 26.⚖️ A seesaw balances. Asha (280 N) sits 2 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?
27. 27.💪 Which can a force NOT do? (a) start it moving (b) change its colour (c) change its shape (d) stop it moving
28. 28.🔍 Which is the odd one out? (a) skating on ice (b) powder on a carrom board (c) sand on a slippery path (d) a smooth steel slide
29. 29.True or false: a movable pulley is on a flagpole top. (a) False (b) True
30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
31. 31.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
32. 32.⚖️ A lever bar balances. The load is 810 N at 10 cm from the fulcrum. The effort is 90 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
33. 33.🏋️ A force of 130 N pushes a cart 7 m along the floor. How much work is done, in joules?
34. 34.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a road up a hill (c) a crane hook block (d) a truck loading ramp
35. 35.⚖️ A seesaw balances. Ravi (280 N) sits 2 m from the pivot on one side; Kabir (280 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
36. 36.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
37. 37.True or false: a water tap handle is a wheel and axle. (a) False (b) True
38. 38.Which of these is a wheel and axle? (a) a flagpole rope wheel (b) a knife edge (c) a road up a hill (d) a round doorknob
39. 39.⚖️ A lever bar balances. The load is 80 N at 50 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?
40. 40.Which of these is a pulley? (a) a jar lid (b) an axe blade (c) a bottle opener (d) a crane hook block

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