Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 858 · 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 force of 10 N pushes a cart 5 m along the floor. How much work is done, in joules?
2. 2.🏋️ A force of 160 N did 320 J of work. How many metres did the object move?
3. 3.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
4. 4.Which of these is a pulley? (a) a playground slide (b) the tip of a nail (c) a wood screw (d) a crane hook block
5. 5.Which of these is a lever? (a) a truck loading ramp (b) a wood screw (c) a crowbar (d) a water tap handle
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 20 cm and the load at 70 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
7. 7.True or false: your forearm is a class 2 lever (load in the middle). (a) False (b) True
8. 8.⚙️ A screw is really … (a) a tiny pulley (b) a bent lever (c) a kind of wheel (d) a ramp wrapped round
9. 9.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
10. 10.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
11. 11.True or false: pressing a doorbell is a pull. (a) True (b) False
12. 12.True or false: pushing a trolley is a pull. (a) True (b) False
13. 13.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
14. 14.⚖️ A seesaw balances. Meena (120 N) sits ? m from the pivot on one side; Kabir (360 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
15. 15.True or false: a bottle opener is a wedge. (a) True (b) False
16. 16.True or false: a box pushed on carpet gives more friction. (a) True (b) False
17. 17.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
18. 18.🔍 Which is the odd one out? (a) a seesaw (b) a crowbar (c) a road up a hill (d) a bottle opener
19. 19.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
20. 20.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
21. 21.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
22. 22.Which of these is an inclined plane? (a) a round doorknob (b) a road up a hill (c) a bottle cap (d) a door stopper
23. 23.🔍 Which is the odd one out? (a) a wet tiled floor (b) powder on a carrom board (c) oil on a squeaky hinge (d) a grippy rubber sole
24. 24.True or false: opening a drawer is a pull. (a) True (b) False
25. 25.Which of these is a wheel and axle? (a) a truck loading ramp (b) a well-bucket rope wheel (c) a wheelchair ramp (d) a water tap handle
26. 26.💪 Which can a force NOT do? (a) change its shape (b) stop it moving (c) start it moving (d) change its colour
27. 27.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 9 N, sandpaper 12 N, ice 4 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
30. 30.⚙️ Which simple machine is a jar lid? (a) wheel and axle (b) lever (c) pulley (d) screw
31. 31.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
32. 32.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
33. 33.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
34. 34.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
35. 35.💪 A cart is pulled to the right with 95 N and to the left with 105 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
36. 36.💪 Two children push a box to the right, one with 75 N and the other with 85 N. What is the net (total) force on the box, in newtons?
37. 37.Which of these is an inclined plane? (a) a wheelchair ramp (b) a screw jack (c) a bottle cap (d) a nut and bolt
38. 38.💪 A bag has a mass of 41 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
39. 39.🔍 Which is the odd one out? (a) a knife edge (b) a seesaw (c) a bottle opener (d) a crowbar
40. 40.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction

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