Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 440 · 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.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Kabir (440 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
2. 2.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) the direction of pull (d) gravity
3. 3.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
4. 4.⚖️ A lever bar balances. The load is 120 N at 40 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
6. 6.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 80 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
8. 8.⚙️ A wedge is … (a) a bar on a pivot (b) a wheel on a rod (c) a rope on a wheel (d) two ramps back to back
9. 9.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
10. 10.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
11. 11.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) far from the fulcrum (c) on the fulcrum (d) on the rock
12. 12.True or false: a tyre with deep treads gives more friction. (a) False (b) True
13. 13.🪝 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)
14. 14.🔍 Which is the odd one out? (a) a rough doormat (b) powder on a carrom board (c) oil on a squeaky hinge (d) a smooth steel slide
15. 15.🪝 A winch has a wheel of radius 32 cm and an axle of radius 4 cm. What effort on the wheel lifts a 1120 N bucket on the axle, in newtons? (ideal)
16. 16.⚖️ A lever bar balances. The load is 20 N at 20 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.⚙️ Which simple machine is a seesaw? (a) wedge (b) inclined plane (c) wheel and axle (d) lever
18. 18.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
19. 19.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 100 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.🪝 A well winch has a handle (wheel) of radius 3 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
21. 21.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
22. 22.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
23. 23.Which of these is an inclined plane? (a) a door stopper (b) a road up a hill (c) a bottle cap (d) a crane hook block
24. 24.Which of these is a lever? (a) a screw jack (b) a well-bucket rope wheel (c) a seesaw (d) a door stopper
25. 25.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
26. 26.⚖️ A lever bar balances. The load is 240 N at 20 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
27. 27.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
28. 28.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
30. 30.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 50 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.Which of these is a lever? (a) a window blind cord (b) a door stopper (c) a crowbar (d) a well-bucket rope wheel
32. 32.🔍 Which is the odd one out? (a) a chisel (b) a knife edge (c) a well winch handle (d) an axe blade
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 6 N, a carpet 10 N, sandpaper 14 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
34. 34.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
35. 35.⚖️ A lever bar balances. The load is 180 N at ? cm from the fulcrum. The effort is 40 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
37. 37.⚖️ A seesaw balances. Asha (360 N) sits ? m from the pivot on one side; Zoya (540 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
38. 38.⚖️ Turning effect = force × … (a) distance from fulcrum (b) colour of bar (c) mass of fulcrum (d) time taken
39. 39.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
40. 40.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3

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