Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 11 · 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.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
2. 2.⚖️ A seesaw balances. Arjun (380 N) sits 1 m from the pivot on one side; Zoya (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.🏋️ A force of 310 N did 620 J of work. How many metres did the object move?
4. 4.⚖️ Which class of lever is a lemon squeezer? (a) class 1 (b) class 2 (c) class 3
5. 5.Which of these is caused by magnetic force? (a) pedalling a cycle (b) a rolling ball slows (c) a compass needle turns (d) a thrown ball comes down
6. 6.⚙️ Which simple machine is a seesaw? (a) screw (b) wedge (c) lever (d) inclined plane
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a glass sheet 5 N, a carpet 8 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
8. 8.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
9. 9.💪 In a tug of war, one team pulls left with 25 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
10. 10.Which of these is a lever? (a) a claw hammer on a nail (b) a truck loading ramp (c) a crane hook block (d) a window blind cord
11. 11.🏋️ A force of 490 N did 2940 J of work. How many metres did the object move?
12. 12.🔍 Which is the odd one out? (a) a crane hook block (b) a crowbar (c) a claw hammer on a nail (d) a nutcracker
13. 13.⚖️ Turning effect = force × … (a) colour of bar (b) time taken (c) mass of fulcrum (d) distance from fulcrum
14. 14.True or false: a truck loading ramp is a pulley. (a) True (b) False
15. 15.True or false: a claw hammer on a nail is a lever. (a) False (b) True
16. 16.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Kabir (380 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.⚙️ Which simple machine is a crowbar? (a) lever (b) inclined plane (c) screw (d) wedge
18. 18.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
19. 19.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) anywhere (d) farther from the pivot
20. 20.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a smaller rod (axle) (c) a flat ramp (d) a sharp wedge
21. 21.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) turning effects match (d) the fulcrum moves
22. 22.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
23. 23.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 3 (c) class 1
24. 24.⚖️ A seesaw balances. Meena (760 N) sits ? m from the pivot on one side; Kabir (190 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
25. 25.⚖️ A seesaw balances. Arjun (? N) sits 4 m from the pivot on one side; Kabir (760 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
26. 26.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
27. 27.True or false: a fixed pulley stays in one place. (a) True (b) False
28. 28.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
29. 29.🪝 A winch has a wheel of radius 16 cm and an axle of radius 4 cm. What effort on the wheel lifts a 760 N bucket on the axle, in newtons? (ideal)
30. 30.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
31. 31.🪝 A bucket weighing 390 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
32. 32.True or false: kicking a football is a pull. (a) True (b) False
33. 33.🏋️ Pushing a crate 5 m took 550 J of work. What force was used, in newtons?
34. 34.True or false: skating on ice gives more friction. (a) True (b) False
35. 35.💪 A box weighs 160 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
36. 36.True or false: closing a drawer is a pull. (a) True (b) False
37. 37.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
38. 38.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) False (b) True
39. 39.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
40. 40.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley

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