Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 833 · 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.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
2. 2.True or false: pushing a trolley is a push. (a) False (b) True
3. 3.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Arjun (260 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 3 (c) class 1
5. 5.🪝 A pulley system lifts a 720 N load with an effort of 180 N. What is its mechanical advantage (MA)?
6. 6.Which of these is a screw? (a) a knife edge (b) a wood screw (c) a road up a hill (d) an axe blade
7. 7.⚖️ A lever bar balances. The load is 450 N at ? cm from the fulcrum. The effort is 200 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
8. 8.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
9. 9.True or false: a rough doormat gives more friction. (a) False (b) True
10. 10.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to save rubber (d) to go slower
11. 11.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
12. 12.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
13. 13.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
14. 14.🏋️ Pushing a crate 9 m took 2790 J of work. What force was used, in newtons?
15. 15.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, sandpaper 11 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a carpet (c) sandpaper (d) a wooden plank
17. 17.💪 In a tug of war, one team pulls right with 45 N and the other pulls left with 35 N. What is the size of the net force, in newtons?
18. 18.💪 Which force is at work: brakes stop a bicycle? (a) magnetic force (b) friction (c) muscular force (d) gravity
19. 19.🏋️ 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?
20. 20.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) on the pivot (c) farther from the pivot (d) closer to the pivot
21. 21.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
22. 22.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
23. 23.⚖️ A seesaw balances. Meena (? N) sits 4 m from the pivot on one side; Kabir (720 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) the bar is short (d) both weights are equal
25. 25.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
26. 26.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
27. 27.💪 In a tug of war, one team pulls left with 60 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
28. 28.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the size of the load (d) the colour of rope
29. 29.Which of these is an inclined plane? (a) a steering wheel (b) a road up a hill (c) an axe blade (d) a nut and bolt
30. 30.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 150 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.⚙️ Which simple machine is a truck loading ramp? (a) wheel and axle (b) inclined plane (c) wedge (d) pulley
32. 32.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a flat ramp (d) a smaller rod (axle)
33. 33.⚖️ A lever bar balances. The load is 320 N at 20 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
34. 34.🏋️ A force of 50 N did 150 J of work. How many metres did the object move?
35. 35.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Asha (220 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
37. 37.💪 Which force is at work: shoes grip the floor? (a) gravity (b) muscular force (c) friction (d) magnetic force
38. 38.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, a glass sheet 1 N, a wooden plank 3 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
40. 40.True or false: a flagpole rope wheel is a lever. (a) False (b) True

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