Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 409 · 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: plucking a mango is a push. (a) True (b) False
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 9 N, a carpet 10 N, ice 3 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) a carpet
3. 3.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
4. 4.Which of these is an inclined plane? (a) a claw hammer on a nail (b) a truck loading ramp (c) a well winch handle (d) a wood screw
5. 5.💪 A bag has a mass of 59 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
6. 6.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
7. 7.⚙️ A screw is really … (a) a bent lever (b) a kind of wheel (c) a ramp wrapped round (d) a tiny pulley
8. 8.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
9. 9.True or false: a fixed pulley halves the effort. (a) False (b) True
10. 10.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
11. 11.🪝 A load of 140 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
12. 12.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) True (b) False
13. 13.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
14. 14.⚖️ A lever bar balances. The load is 60 N at 50 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.💪 In a tug of war, one team pulls left with 40 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
16. 16.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
17. 17.Which of these is caused by gravity? (a) a river flows downhill (b) a compass needle turns (c) rubbing hands warms them (d) pedalling a cycle
18. 18.True or false: a movable pulley stays in one place. (a) True (b) False
19. 19.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
20. 20.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.True or false: opening a drawer is a push. (a) True (b) False
22. 22.💪 Which force is at work: an apple falls down? (a) magnetic force (b) gravity (c) muscular force (d) friction
23. 23.Which of these is a lever? (a) a water tap handle (b) a crane hook block (c) a seesaw (d) a nut and bolt
24. 24.⚖️ A lever bar balances. The load is 350 N at 30 cm from the fulcrum. The effort is 210 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
25. 25.💪 Which force is at work: lifting a school bag? (a) gravity (b) friction (c) magnetic force (d) muscular force
26. 26.🪝 A bucket weighing 150 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
27. 27.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the pulley (c) the load (d) the effort
28. 28.⚖️ What is the pivot point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
29. 29.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 10 (d) 6
30. 30.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
31. 31.True or false: a grippy rubber sole gives less friction. (a) True (b) False
32. 32.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the fulcrum (c) the load (d) the effort
33. 33.💪 Which can a force NOT do? (a) change its shape (b) start it moving (c) stop it moving (d) change its colour
34. 34.💪 Which force is at work: a compass needle turns? (a) gravity (b) friction (c) muscular force (d) magnetic force
35. 35.True or false: kicking a football is a push. (a) False (b) True
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 9 N, sandpaper 11 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
37. 37.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
38. 38.🪝 A winch has a wheel of radius 18 cm and an axle of radius 3 cm. What effort on the wheel lifts a 540 N bucket on the axle, in newtons? (ideal)
39. 39.💪 A bag has a mass of 6 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
40. 40.⚖️ A lever bar balances. The load is 810 N at ? cm from the fulcrum. The effort is 450 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?

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