Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 270 · 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.💪 Two children push a box to the right, one with 70 N and the other with 80 N. What is the net (total) force on the box, in newtons?
2. 2.Which of these is an inclined plane? (a) a water tap handle (b) a knife edge (c) a wheelchair ramp (d) a round doorknob
3. 3.True or false: a road up a hill is an inclined plane. (a) False (b) True
4. 4.True or false: hitting a cricket ball is a push. (a) True (b) False
5. 5.⚖️ A lever bar balances. The load is 200 N at 30 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
6. 6.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
7. 7.True or false: drawing up a well bucket is a pull. (a) True (b) False
8. 8.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) less effort needed (d) more effort needed
9. 9.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
10. 10.🏋️ A force of 240 N did 720 J of work. How many metres did the object move?
11. 11.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
12. 12.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 450 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
13. 13.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) doubled (c) gravity (d) balanced
14. 14.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) stop all friction (c) switch off gravity (d) use a smaller force
15. 15.💪 Which force is at work: rain falls to the ground? (a) friction (b) muscular force (c) gravity (d) magnetic force
16. 16.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 1 (c) class 3
17. 17.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
18. 18.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 1 (c) class 3
19. 19.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
20. 20.True or false: a crane hook block is a wheel and axle. (a) False (b) True
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 5 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
22. 22.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
23. 23.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
24. 24.Which of these is a wedge? (a) a door stopper (b) a round doorknob (c) a crane hook block (d) a truck loading ramp
25. 25.True or false: a movable pulley only changes direction. (a) False (b) True
26. 26.⚖️ A lever bar balances. The load is 200 N at 50 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
27. 27.Which of these is caused by gravity? (a) a thrown ball comes down (b) brakes stop a bicycle (c) rubbing hands warms them (d) shoes grip the floor
28. 28.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.True or false: a road up a hill is a wheel and axle. (a) False (b) True
30. 30.🏋️ A force of 70 N did 420 J of work. How many metres did the object move?
31. 31.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.🏋️ Pushing a crate 1 m took 200 J of work. What force was used, in newtons?
33. 33.⚙️ A screw is really … (a) a bent lever (b) a ramp wrapped round (c) a tiny pulley (d) a kind of wheel
34. 34.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 8 N, sandpaper 9 N, ice 2 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
36. 36.🔍 Which is the odd one out? (a) sand on a slippery path (b) oil on a squeaky hinge (c) a wet tiled floor (d) skating on ice
37. 37.⚖️ A lever bar balances. The load is 270 N at 40 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.💪 Which force is at work: brakes stop a bicycle? (a) gravity (b) muscular force (c) friction (d) magnetic force
39. 39.True or false: pulling up your socks is a push. (a) False (b) True
40. 40.💪 Which force is at work: a river flows downhill? (a) muscular force (b) gravity (c) friction (d) magnetic force

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