Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 824 · 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 pulley system lifts a 540 N load with an effort of 270 N. What is its mechanical advantage (MA)?
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 7 N, a carpet 8 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
3. 3.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a loose rope (c) a smaller rod (axle) (d) a flat ramp
4. 4.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
5. 5.Which of these is caused by gravity? (a) a river flows downhill (b) a rolling ball slows (c) rubbing hands warms them (d) a magnet picks up pins
6. 6.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 2 (c) class 1
7. 7.🏋️ A force of 240 N did 1680 J of work. How many metres did the object move?
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 8 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
9. 9.Which of these is a pulley? (a) a nutcracker (b) a knife edge (c) a bottle opener (d) a well-bucket rope wheel
10. 10.⚙️ A wedge is … (a) a rope on a wheel (b) a bar on a pivot (c) two ramps back to back (d) a wheel on a rod
11. 11.🏋️ A force of 300 N did 1200 J of work. How many metres did the object move?
12. 12.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) both weights are equal (d) the fulcrum moves
13. 13.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
14. 14.True or false: a water tap handle is a lever. (a) True (b) False
15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, ice 1 N, a wooden plank 4 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
17. 17.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
18. 18.⚙️ Which simple machine is an axe blade? (a) inclined plane (b) wedge (c) pulley (d) lever
19. 19.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) ice (d) polished marble
20. 20.True or false: a nutcracker is a lever. (a) False (b) True
21. 21.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
22. 22.Which of these is a wheel and axle? (a) a well-bucket rope wheel (b) a crane hook block (c) a well winch handle (d) a jar lid
23. 23.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) a rough doormat (b) oil on a squeaky hinge (c) chalk on a gym bar (d) sand on a slippery path
25. 25.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) nothing (c) the load (d) the effort
26. 26.⚖️ A lever bar balances. The load is 90 N at 30 cm from the fulcrum. The effort is 30 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.🛞 How can we reduce friction in a machine? (a) make parts rough (b) add sand (c) press parts harder (d) oil the moving parts
28. 28.True or false: a round doorknob is a pulley. (a) False (b) True
29. 29.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
30. 30.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
31. 31.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) False (b) True
32. 32.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.⚙️ Which simple machine is a door stopper? (a) wheel and axle (b) wedge (c) inclined plane (d) lever
34. 34.🪝 A well winch has a handle (wheel) of radius 14 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
35. 35.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) friction (c) muscular force (d) gravity
36. 36.True or false: a bottle cap is a screw. (a) True (b) False
37. 37.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) stop all friction (c) use a smaller force (d) switch off gravity
38. 38.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) False (b) True
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 7 N, a wooden plank 9 N, a carpet 11 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N, sandpaper 7 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper

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