Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 597 · 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.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
2. 2.Which of these is a pulley? (a) a bottle cap (b) a truck loading ramp (c) a screw jack (d) a well-bucket rope wheel
3. 3.True or false: a rough doormat gives more friction. (a) False (b) True
4. 4.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) both weights are equal (d) the fulcrum moves
5. 5.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) True (b) False
6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
7. 7.True or false: plucking a mango is a pull. (a) True (b) False
8. 8.True or false: a nutcracker is a wheel and axle. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a nut and bolt (b) a jar lid (c) a playground slide (d) a wood screw
10. 10.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the direction of pull (c) the size of the load (d) gravity
11. 11.🪝 A bucket weighing 300 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
12. 12.True or false: hitting a cricket ball is a pull. (a) False (b) True
13. 13.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) True (b) False
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
15. 15.Which of these is caused by friction? (a) a river flows downhill (b) brakes stop a bicycle (c) pedalling a cycle (d) rain falls to the ground
16. 16.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
17. 17.🛞 How can we reduce friction in a machine? (a) add sand (b) press parts harder (c) oil the moving parts (d) make parts rough
18. 18.True or false: a truck loading ramp is a wheel and axle. (a) False (b) True
19. 19.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
20. 20.🪝 More rope sections holding a load means … (a) the load floats (b) less effort needed (c) no change (d) more effort needed
21. 21.⚖️ A lever bar balances. The load is 560 N at 20 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
22. 22.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 3 (c) class 1
23. 23.💪 A bag has a mass of 13 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
24. 24.True or false: a grippy rubber sole gives less friction. (a) False (b) True
25. 25.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
26. 26.⚙️ Which simple machine is a steering wheel? (a) pulley (b) wheel and axle (c) inclined plane (d) screw
27. 27.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 4 N, a wooden plank 6 N, a carpet 8 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 8 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a wooden plank (d) a carpet
30. 30.⚖️ A lever bar balances. The load is 700 N at 50 cm from the fulcrum. The effort is 500 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.True or false: closing a drawer is a push. (a) False (b) True
32. 32.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
33. 33.Which of these is a wedge? (a) a screw jack (b) a crane hook block (c) a well-bucket rope wheel (d) a chisel
34. 34.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 2 (c) class 1
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, a glass sheet 2 N, a wooden plank 3 N. How many newtons more were needed on sandpaper than on a glass sheet?
36. 36.⚙️ Which simple machine is a nut and bolt? (a) screw (b) inclined plane (c) pulley (d) lever
37. 37.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
38. 38.⚙️ Which simple machine is a jar lid? (a) screw (b) pulley (c) inclined plane (d) wheel and axle
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a wooden plank 9 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
40. 40.Which of these is a pulley? (a) a claw hammer on a nail (b) a truck loading ramp (c) a steering wheel (d) a crane hook block

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