Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 733 · 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 can a force NOT do? (a) start it moving (b) stop it moving (c) change its colour (d) change its shape
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 50 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
3. 3.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 6 (c) 3 (d) 12
4. 4.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
5. 5.💪 In a tug of war, one team pulls right with 15 N and the other pulls left with 5 N. What is the size of the net force, in newtons?
6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
7. 7.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a smooth steel slide (c) sand on a slippery path (d) a box pushed on carpet
8. 8.💪 A box weighs 230 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
9. 9.True or false: drawing up a well bucket is a push. (a) False (b) True
10. 10.⚖️ What is the pivot point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
11. 11.Which of these is a wheel and axle? (a) a knife edge (b) a window blind cord (c) a nut and bolt (d) a round doorknob
12. 12.⚖️ A seesaw balances. Meena (450 N) sits ? m from the pivot on one side; Kabir (600 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
13. 13.💪 Two children push a box to the right, one with 25 N and the other with 85 N. What is the net (total) force on the box, in newtons?
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 80 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
15. 15.💪 A bag has a mass of 58 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
16. 16.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) True (b) False
17. 17.⚖️ A seesaw balances. Asha (320 N) sits 2 m from the pivot on one side; Ravi (320 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
18. 18.🔍 Which is the odd one out? (a) a box pushed on carpet (b) chalk on a gym bar (c) a rough doormat (d) skating on ice
19. 19.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a crowbar (c) a flagpole rope wheel (d) a nutcracker
20. 20.🪝 A pulley system lifts a 1040 N load with an effort of 260 N. What is its mechanical advantage (MA)?
21. 21.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 90 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
23. 23.🛞 How can we reduce friction in a machine? (a) add sand (b) oil the moving parts (c) press parts harder (d) make parts rough
24. 24.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
25. 25.⚖️ A lever bar balances. The load is 120 N at 50 cm from the fulcrum. The effort is 150 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
27. 27.True or false: an axe blade is a wedge. (a) False (b) True
28. 28.True or false: a pair of kitchen tongs is a class 2 lever (load in the middle). (a) False (b) True
29. 29.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a sharp wedge (c) a smaller rod (axle) (d) a flat ramp
30. 30.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to go slower (c) to look nice (d) to save rubber
31. 31.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the bar is short (d) the fulcrum moves
32. 32.Which of these is caused by magnetic force? (a) lifting a school bag (b) a rolling ball slows (c) a fridge magnet sticks (d) rubbing hands warms them
33. 33.Which of these is a pulley? (a) a knife edge (b) a bottle cap (c) the tip of a nail (d) a flagpole rope wheel
34. 34.🔍 Which is the odd one out? (a) a truck loading ramp (b) a road up a hill (c) a wheelchair ramp (d) a water tap handle
35. 35.Which of these is an inclined plane? (a) a bottle cap (b) a seesaw (c) a claw hammer on a nail (d) a road up a hill
36. 36.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
37. 37.⚖️ 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 2 (c) class 3
38. 38.⚙️ Which simple machine is a jar lid? (a) screw (b) wheel and axle (c) lever (d) inclined plane
39. 39.🪝 A pulley system lifts a 360 N load with an effort of 90 N. What is its mechanical advantage (MA)?
40. 40.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?

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