Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 385 · 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: skating on ice gives less friction. (a) True (b) False
2. 2.Which of these is a pulley? (a) a nut and bolt (b) the tip of a nail (c) a bottle cap (d) a flagpole rope wheel
3. 3.Which of these is a pulley? (a) a crane hook block (b) a wood screw (c) a road up a hill (d) a door stopper
4. 4.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
5. 5.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
6. 6.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
7. 7.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
8. 8.💪 A force is a … (a) push or a pull (b) type of sound (c) unit of time (d) kind of colour
9. 9.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) gravity (c) balanced (d) doubled
10. 10.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
11. 11.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
12. 12.🪝 A winch has a wheel of radius 35 cm and an axle of radius 5 cm. What effort on the wheel lifts an 840 N bucket on the axle, in newtons? (ideal)
13. 13.Which of these is caused by muscular force? (a) a thrown ball comes down (b) a fridge magnet sticks (c) an apple falls down (d) lifting a school bag
14. 14.💪 Which force is at work: pedalling a cycle? (a) magnetic force (b) gravity (c) friction (d) muscular force
15. 15.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
16. 16.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 6 (c) 12 (d) 3
17. 17.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.⚙️ Which simple machine is a well winch handle? (a) wheel and axle (b) lever (c) screw (d) wedge
19. 19.Which of these is an inclined plane? (a) a steering wheel (b) a chisel (c) a well winch handle (d) a truck loading ramp
20. 20.🛞 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 7 N, a carpet 10 N. How many newtons more were needed on a carpet than on ice?
21. 21.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
22. 22.🪝 A winch has a wheel of radius 10 cm and an axle of radius 2 cm. What effort on the wheel lifts a 1000 N bucket on the axle, in newtons? (ideal)
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, a glass sheet 3 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 4 N, a carpet 5 N, sandpaper 9 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, a glass sheet 4 N, a wooden plank 7 N, a carpet 9 N. How many newtons more were needed on sandpaper than on a glass sheet?
26. 26.True or false: a pair of scissors is a class 2 lever (load in the middle). (a) False (b) True
27. 27.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Zoya (800 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.🛞 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 5 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
29. 29.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a tyre with deep treads (c) a smooth steel slide (d) a box pushed on carpet
30. 30.🏋️ A force of 400 N pushes a cart 8 m along the floor. How much work is done, in joules?
31. 31.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Zoya (600 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
32. 32.⚖️ A seesaw balances. Kabir (? N) sits 1 m from the pivot on one side; Ravi (130 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
33. 33.True or false: a fixed pulley stays in one place. (a) True (b) False
34. 34.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) litre (L) (d) newton (N)
35. 35.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) polished marble (d) glass
36. 36.⚖️ A lever bar balances. The load is 40 N at 20 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.🪝 A winch has a wheel of radius 18 cm and an axle of radius 3 cm. What effort on the wheel lifts a 120 N bucket on the axle, in newtons? (ideal)
38. 38.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
39. 39.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
40. 40.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?

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