Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 723 · 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 fixed pulley makes you pull 2× rope. (a) False (b) True
2. 2.⚖️ A seesaw balances. Asha (360 N) sits 2 m from the pivot on one side; Zoya (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.⚖️ A seesaw balances. Ravi (680 N) sits ? m from the pivot on one side; Zoya (510 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
4. 4.⚖️ A lever bar balances. The load is 400 N at 20 cm from the fulcrum. The effort is 100 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
6. 6.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
7. 7.Which of these is a screw? (a) a wheelchair ramp (b) the tip of a nail (c) a claw hammer on a nail (d) a wood screw
8. 8.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) nothing
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 10 N, a carpet 13 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) ice
10. 10.⚙️ Which simple machine is a chisel? (a) lever (b) wedge (c) pulley (d) inclined plane
11. 11.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
12. 12.⚖️ A seesaw balances. Asha (520 N) sits 2 m from the pivot on one side; Arjun (260 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
13. 13.⚖️ Which class of lever is your forearm? (a) class 1 (b) class 2 (c) class 3
14. 14.True or false: a tug of war is a push. (a) True (b) False
15. 15.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) colour of bar (d) distance from fulcrum
16. 16.True or false: a nut and bolt is a wedge. (a) True (b) False
17. 17.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
18. 18.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
19. 19.🪝 A load of 200 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
20. 20.🪝 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?
21. 21.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
23. 23.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.True or false: a fixed pulley stays in one place. (a) False (b) True
25. 25.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
26. 26.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Ravi (340 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 1 (c) class 3
28. 28.💪 Which force is at work: a fridge magnet sticks? (a) muscular force (b) friction (c) magnetic force (d) gravity
29. 29.⚖️ A lever bar balances. The load is 160 N at ? cm from the fulcrum. The effort is 40 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.⚖️ A seesaw balances. Arjun (140 N) sits 3 m from the pivot on one side; Asha (420 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
31. 31.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
32. 32.💪 A cart is pulled to the right with 90 N and to the left with 85 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
33. 33.🪝 A bucket weighing 90 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
34. 34.True or false: a fixed pulley only changes direction. (a) True (b) False
35. 35.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
36. 36.💪 A cart is pulled to the right with 40 N and to the left with 30 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
37. 37.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a ramp wrapped round (d) a kind of wheel
38. 38.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
39. 39.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) farther from the pivot (d) closer to the pivot
40. 40.🔍 Which is the odd one out? (a) a well winch handle (b) a water tap handle (c) a bottle cap (d) a steering wheel

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