Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 684 · 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 tug of war is a pull. (a) True (b) False
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
3. 3.🪝 A well winch has a handle (wheel) of radius 32 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
4. 4.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a crowbar (c) a seesaw (d) a road up a hill
5. 5.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
6. 6.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
7. 7.🛞 How can we reduce friction in a machine? (a) add sand (b) make parts rough (c) oil the moving parts (d) press parts harder
8. 8.💪 Which force is at work: a thrown ball comes down? (a) friction (b) gravity (c) magnetic force (d) muscular force
9. 9.True or false: a road up a hill is a lever. (a) False (b) True
10. 10.🪝 A pulley system lifts an 810 N load with an effort of 270 N. What is its mechanical advantage (MA)?
11. 11.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) True (b) False
12. 12.🪝 A well winch has a handle (wheel) of radius 10 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
13. 13.Which of these is caused by muscular force? (a) a river flows downhill (b) pedalling a cycle (c) a compass needle turns (d) rubbing hands warms them
14. 14.🪝 A pulley system lifts a 150 N load with an effort of 50 N. What is its mechanical advantage (MA)?
15. 15.True or false: a grippy rubber sole gives less friction. (a) True (b) False
16. 16.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the fulcrum (c) the effort (d) the load
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, a carpet 8 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
18. 18.True or false: your forearm is a class 3 lever (effort in the middle). (a) False (b) True
19. 19.Which of these is caused by gravity? (a) a fridge magnet sticks (b) lifting a school bag (c) rubbing hands warms them (d) rain falls to the ground
20. 20.⚖️ A lever bar balances. The load is 40 N at ? cm from the fulcrum. The effort is 60 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
22. 22.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
23. 23.⚖️ A lever bar balances. The load is 270 N at 40 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Kabir (120 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) wet (d) cold
26. 26.⚙️ Which simple machine is a jar lid? (a) lever (b) wheel and axle (c) pulley (d) screw
27. 27.⚖️ A seesaw balances. Asha (800 N) sits 1 m from the pivot on one side; Ravi (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
28. 28.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
29. 29.⚖️ A lever bar balances. The load is 280 N at 30 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
30. 30.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
31. 31.⚙️ Which simple machine is a truck loading ramp? (a) wedge (b) pulley (c) screw (d) inclined plane
32. 32.Which of these is a wedge? (a) a road up a hill (b) a round doorknob (c) a steering wheel (d) a knife edge
33. 33.🪝 A load of 280 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
34. 34.⚖️ 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
35. 35.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
36. 36.True or false: opening a drawer is a push. (a) False (b) True
37. 37.💪 Which force is at work: a magnet picks up pins? (a) magnetic force (b) friction (c) gravity (d) muscular force
38. 38.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
39. 39.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 13 N, ice 4 N, a glass sheet 8 N. How many newtons more were needed on sandpaper than on ice?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids