Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 529 · 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 470 N did 940 J of work. How many metres did the object move?
2. 2.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
3. 3.🪝 A bucket weighing 70 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
4. 4.Which of these is a wheel and axle? (a) a window blind cord (b) a screw jack (c) a round doorknob (d) the tip of a nail
5. 5.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) skating on ice (d) a smooth steel slide
6. 6.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 10 m, how many metres of rope must you pull?
7. 7.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a crane hook block (c) a bottle cap (d) a flagpole rope wheel
8. 8.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.🏋️ Pushing a crate 4 m took 1680 J of work. What force was used, in newtons?
10. 10.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a well winch handle (b) a jar lid (c) a screw jack (d) a bottle cap
12. 12.⚙️ Which simple machine is a crane hook block? (a) inclined plane (b) wedge (c) lever (d) pulley
13. 13.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 8 N, a carpet 11 N, sandpaper 12 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 4 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
16. 16.Which of these is caused by friction? (a) shoes grip the floor (b) a fridge magnet sticks (c) rain falls to the ground (d) a thrown ball comes down
17. 17.True or false: a fixed pulley needs effort = load. (a) False (b) True
18. 18.⚙️ Which simple machine is a well-bucket rope wheel? (a) wheel and axle (b) wedge (c) pulley (d) lever
19. 19.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
20. 20.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
21. 21.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 240 N bucket on the axle, in newtons? (ideal)
22. 22.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) a road up a hill (b) a truck loading ramp (c) an axe blade (d) a wheelchair ramp
24. 24.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
25. 25.💪 Which force is at work: a river flows downhill? (a) muscular force (b) friction (c) magnetic force (d) gravity
26. 26.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
27. 27.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
28. 28.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) unbalanced (c) gravity (d) doubled
29. 29.True or false: a broom when sweeping is a class 1 lever (fulcrum in the middle). (a) True (b) False
30. 30.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
31. 31.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) closer to the pivot (d) anywhere
32. 32.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) polished marble (c) glass (d) ice
34. 34.🔍 Which is the odd one out? (a) an axe blade (b) a wheelchair ramp (c) a door stopper (d) a chisel
35. 35.🪝 A load of 400 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
36. 36.True or false: kicking a football is a pull. (a) True (b) False
37. 37.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
38. 38.🪝 A well winch has a handle (wheel) of radius 18 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
39. 39.⚙️ Which simple machine is a window blind cord? (a) wedge (b) pulley (c) inclined plane (d) wheel and axle
40. 40.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the fulcrum (c) the load (d) the effort

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