Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 504 · 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.🏋️ Pushing a crate 6 m took 2880 J of work. What force was used, in newtons?
2. 2.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 10 N, ice 2 N, a wooden plank 3 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
4. 4.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) anywhere (d) closer to the pivot
5. 5.⚖️ Which class of lever is a broom when sweeping? (a) class 1 (b) class 3 (c) class 2
6. 6.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
7. 7.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 500 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
8. 8.💪 Two children push a box to the right, one with 15 N and the other with 35 N. What is the net (total) force on the box, in newtons?
9. 9.⚙️ Which simple machine is a wood screw? (a) lever (b) pulley (c) screw (d) inclined plane
10. 10.🔍 Which is the odd one out? (a) a crane hook block (b) a water tap handle (c) a well-bucket rope wheel (d) a flagpole rope wheel
11. 11.🔍 Which is the odd one out? (a) a water tap handle (b) a well winch handle (c) a round doorknob (d) a road up a hill
12. 12.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) a rough doormat (d) a smooth steel slide
13. 13.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to save rubber (d) to grip the road
14. 14.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 210 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.💪 A bag has a mass of 48 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
16. 16.True or false: pulling up your socks is a push. (a) True (b) False
17. 17.⚖️ A lever bar balances. The load is 120 N at 30 cm from the fulcrum. The effort is 180 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
18. 18.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a ramp wrapped round (d) a kind of wheel
19. 19.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Meena (330 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.🔍 Which is the odd one out? (a) a road up a hill (b) a wheelchair ramp (c) a truck loading ramp (d) a round doorknob
21. 21.🪝 A load of 1000 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
22. 22.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) a grippy rubber sole (d) oil on a squeaky hinge
23. 23.⚖️ A seesaw balances. Arjun (100 N) sits ? m from the pivot on one side; Asha (400 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
24. 24.💪 In which unit do we measure force? (a) newton (N) (b) litre (L) (c) second (s) (d) metre (m)
25. 25.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
26. 26.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
27. 27.💪 A box weighs 40 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
28. 28.⚖️ A seesaw balances. Asha (300 N) sits 1 m from the pivot on one side; Arjun (150 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
29. 29.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
30. 30.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
31. 31.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
32. 32.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) powder on a carrom board (d) a box pushed on carpet
33. 33.⚙️ A wedge is … (a) a wheel on a rod (b) two ramps back to back (c) a rope on a wheel (d) a bar on a pivot
34. 34.💪 A cart is pulled to the right with 35 N and to the left with 35 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
35. 35.True or false: a fixed pulley halves the effort. (a) True (b) False
36. 36.True or false: plucking a mango is a pull. (a) True (b) False
37. 37.True or false: a tug of war is a push. (a) True (b) False
38. 38.Which of these is caused by muscular force? (a) a magnet picks up pins (b) an apple falls down (c) pedalling a cycle (d) a river flows downhill
39. 39.💪 A force is a … (a) unit of time (b) kind of colour (c) type of sound (d) push or a pull
40. 40.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 2 (b) class 1 (c) class 3

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