Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 465 · 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.⚖️ What is the pivot point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
2. 2.🛞 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 6 N, ice 1 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
3. 3.True or false: kicking a football is a pull. (a) False (b) True
4. 4.⚙️ A wedge is … (a) a wheel on a rod (b) a rope on a wheel (c) a bar on a pivot (d) two ramps back to back
5. 5.⚖️ A seesaw balances. Zoya (200 N) sits ? m from the pivot on one side; Asha (400 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
6. 6.💪 A cart is pulled to the right with 80 N and to the left with 85 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
7. 7.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to go slower (d) to look nice
8. 8.⚖️ A seesaw balances. Asha (? N) sits 4 m from the pivot on one side; Arjun (600 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
10. 10.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) polished marble (d) glass
11. 11.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
12. 12.⚖️ A lever bar balances. The load is 300 N at 40 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
14. 14.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
15. 15.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.💪 In a tug of war, one team pulls left with 15 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
17. 17.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) on the pivot (d) closer to the pivot
18. 18.True or false: pushing a swing is a pull. (a) True (b) False
19. 19.⚖️ A seesaw balances. Arjun (180 N) sits 2 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 200 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.🏋️ Pushing a crate 9 m took 270 J of work. What force was used, in newtons?
22. 22.True or false: a fixed pulley needs effort = load. (a) False (b) True
23. 23.True or false: a movable pulley rises with the load. (a) False (b) True
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 80 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
25. 25.🪝 What does a single fixed pulley change? (a) the size of the load (b) the direction of pull (c) the colour of rope (d) gravity
26. 26.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
27. 27.True or false: a bottle opener is a class 1 lever (fulcrum in the middle). (a) False (b) True
28. 28.💪 Which force is at work: a rolling ball slows? (a) gravity (b) muscular force (c) magnetic force (d) friction
29. 29.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
30. 30.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 40 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
31. 31.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
32. 32.🔍 Which is the odd one out? (a) a jar lid (b) a nut and bolt (c) a chisel (d) a wood screw
33. 33.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 5 N, sandpaper 7 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
35. 35.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) press parts harder (d) make parts rough
36. 36.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
37. 37.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
39. 39.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) chalk on a gym bar (d) a box pushed on carpet
40. 40.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 1 (c) class 3

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