Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 615 · 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.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 3 (b) class 2 (c) class 1
2. 2.🔍 Which is the odd one out? (a) skating on ice (b) a grippy rubber sole (c) a rough doormat (d) a box pushed on carpet
3. 3.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
4. 4.⚖️ A seesaw balances. Arjun (300 N) sits ? m from the pivot on one side; Meena (300 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
5. 5.⚙️ Which simple machine is a water tap handle? (a) lever (b) wedge (c) wheel and axle (d) inclined plane
6. 6.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
7. 7.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
8. 8.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a nutcracker (c) a bottle opener (d) a claw hammer on a nail
9. 9.⚙️ A screw is really … (a) a kind of wheel (b) a ramp wrapped round (c) a bent lever (d) a tiny pulley
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
11. 11.⚖️ 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
12. 12.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
13. 13.Which of these is a wheel and axle? (a) a chisel (b) a steering wheel (c) a road up a hill (d) a well-bucket rope wheel
14. 14.True or false: a wet tiled floor gives less friction. (a) True (b) False
15. 15.True or false: a smooth steel slide gives less friction. (a) True (b) False
16. 16.⚙️ Which simple machine is a round doorknob? (a) wheel and axle (b) pulley (c) screw (d) lever
17. 17.True or false: a movable pulley halves the effort. (a) True (b) False
18. 18.🛞 Why are tyres made with deep treads? (a) to go slower (b) to save rubber (c) to look nice (d) to grip the road
19. 19.⚖️ A lever bar balances. The load is 630 N at ? cm from the fulcrum. The effort is 280 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 6 N, sandpaper 8 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
21. 21.⚖️ A lever bar balances. The load is 180 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?
22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
23. 23.⚙️ Which simple machine is a truck loading ramp? (a) pulley (b) wedge (c) inclined plane (d) lever
24. 24.⚖️ A seesaw balances. Zoya (800 N) sits 4 m from the pivot on one side; Arjun (800 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
25. 25.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 12 (c) 3 (d) 6
26. 26.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
27. 27.🔍 Which is the odd one out? (a) a wood screw (b) a crane hook block (c) a flagpole rope wheel (d) a window blind cord
28. 28.True or false: closing a drawer is a push. (a) True (b) False
29. 29.⚖️ A seesaw balances. Arjun (140 N) sits 4 m from the pivot on one side; Meena (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
31. 31.💪 A bag has a mass of 38 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
32. 32.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
33. 33.⚖️ Turning effect = force × … (a) distance from fulcrum (b) time taken (c) mass of fulcrum (d) colour of bar
34. 34.💪 A bag has a mass of 7 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
35. 35.🪝 A load of 240 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 7 N, sandpaper 9 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) ice (d) a carpet
37. 37.Which of these is caused by magnetic force? (a) rubbing hands warms them (b) pedalling a cycle (c) a magnet picks up pins (d) lifting a school bag
38. 38.Which of these is caused by muscular force? (a) a thrown ball comes down (b) a magnet picks up pins (c) brakes stop a bicycle (d) lifting a school bag
39. 39.🔍 Which is the odd one out? (a) a nutcracker (b) a well-bucket rope wheel (c) a crane hook block (d) a window blind cord
40. 40.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley

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