Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 567 · 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.💪 Two children push a box to the right, one with 15 N and the other with 80 N. What is the net (total) force on the box, in newtons?
2. 2.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
3. 3.⚖️ A seesaw balances. Arjun (510 N) sits 3 m from the pivot on one side; Asha (510 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
4. 4.True or false: chalk on a gym bar gives more friction. (a) True (b) False
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 30 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
6. 6.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
7. 7.🔍 Which is the odd one out? (a) a knife edge (b) a window blind cord (c) an axe blade (d) the tip of a nail
8. 8.💪 A box weighs 260 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
9. 9.⚖️ A seesaw balances. Kabir (360 N) sits 1 m from the pivot on one side; Meena (180 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
10. 10.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
11. 11.True or false: a seesaw is a class 2 lever (load in the middle). (a) True (b) False
12. 12.True or false: hitting a cricket ball is a pull. (a) False (b) True
13. 13.💪 Which force is at work: pedalling a cycle? (a) magnetic force (b) gravity (c) muscular force (d) friction
14. 14.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
15. 15.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
16. 16.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) the fulcrum moves (d) turning effects match
17. 17.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 8 N, ice 4 N, a glass sheet 5 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
19. 19.🔍 Which is the odd one out? (a) a steering wheel (b) a road up a hill (c) a truck loading ramp (d) a playground slide
20. 20.True or false: the tip of a nail is a wedge. (a) False (b) True
21. 21.True or false: skating on ice gives more friction. (a) True (b) False
22. 22.True or false: sand on a slippery path gives more friction. (a) False (b) True
23. 23.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
24. 24.True or false: a grippy rubber sole gives less friction. (a) True (b) False
25. 25.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a sharp wedge (c) a loose rope (d) a flat ramp
26. 26.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
27. 27.⚖️ A seesaw balances. Arjun (220 N) sits ? m from the pivot on one side; Meena (220 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
28. 28.True or false: a movable pulley stays in one place. (a) True (b) False
29. 29.⚖️ A seesaw balances. Arjun (150 N) sits ? m from the pivot on one side; Asha (150 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
30. 30.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
31. 31.💪 A box weighs 430 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
32. 32.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
33. 33.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
34. 34.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
35. 35.💪 Two children push a box to the right, one with 85 N and the other with 30 N. What is the net (total) force on the box, in newtons?
36. 36.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
37. 37.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
38. 38.🪝 A bucket weighing 290 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
39. 39.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
40. 40.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley

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