Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 79 · 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.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
2. 2.True or false: pressing a doorbell is a pull. (a) True (b) False
3. 3.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to save rubber (c) to look nice (d) to go slower
4. 4.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
5. 5.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the fulcrum (c) the load (d) the effort
6. 6.💪 In which unit do we measure force? (a) second (s) (b) metre (m) (c) newton (N) (d) litre (L)
7. 7.Which of these is a wedge? (a) a well-bucket rope wheel (b) the tip of a nail (c) a window blind cord (d) a claw hammer on a nail
8. 8.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) anywhere (c) farther from the pivot (d) on the pivot
9. 9.🏋️ A force of 400 N pushes a cart 1 m along the floor. How much work is done, in joules?
10. 10.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
11. 11.Which of these is caused by friction? (a) a compass needle turns (b) a magnet picks up pins (c) pedalling a cycle (d) rubbing hands warms them
12. 12.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
13. 13.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 80 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
15. 15.💪 A box weighs 90 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
16. 16.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
17. 17.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
18. 18.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
19. 19.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 50 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
20. 20.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) gravity (c) unbalanced (d) doubled
21. 21.Which of these is caused by gravity? (a) squeezing a lemon (b) pedalling a cycle (c) a rolling ball slows (d) an apple falls down
22. 22.🏋️ Pushing a crate 8 m took 2160 J of work. What force was used, in newtons?
23. 23.⚙️ Which simple machine is an axe blade? (a) lever (b) pulley (c) wheel and axle (d) wedge
24. 24.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
25. 25.🪝 A bucket weighing 450 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
26. 26.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
27. 27.💪 A bag has a mass of 42 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
28. 28.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 2 (c) class 3
29. 29.True or false: a tug of war is a pull. (a) True (b) False
30. 30.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) turning effects match (d) the fulcrum moves
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 10 N, ice 2 N, a glass sheet 3 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
32. 32.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
33. 33.⚙️ A screw is really … (a) a kind of wheel (b) a bent lever (c) a ramp wrapped round (d) a tiny pulley
34. 34.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the fulcrum (c) the pulley (d) the effort
35. 35.True or false: a round doorknob is a wheel and axle. (a) True (b) False
36. 36.🪝 A load of 570 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
37. 37.🔍 Which is the odd one out? (a) a water tap handle (b) a round doorknob (c) a steering wheel (d) a wood screw
38. 38.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) wet (d) cold
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 7 N, sandpaper 11 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
40. 40.True or false: a flagpole rope wheel is a wedge. (a) False (b) True

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