Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 410 · 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: pressing a doorbell is a push. (a) True (b) False
2. 2.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
3. 3.⚙️ Which simple machine is a crowbar? (a) wedge (b) lever (c) pulley (d) inclined plane
4. 4.Which of these is caused by friction? (a) a rolling ball slows (b) rain falls to the ground (c) a river flows downhill (d) an apple falls down
5. 5.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a wood screw (c) a crane hook block (d) a window blind cord
6. 6.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 4 N, a carpet 5 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
8. 8.🔍 Which is the odd one out? (a) a steering wheel (b) a round doorknob (c) a seesaw (d) a well winch handle
9. 9.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) both weights are equal (d) the bar is short
10. 10.True or false: hitting a cricket ball is a push. (a) False (b) True
11. 11.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
12. 12.True or false: a truck loading ramp is a pulley. (a) False (b) True
13. 13.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 1 (c) class 3
14. 14.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 80 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
15. 15.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) stop it moving (d) change its colour
16. 16.💪 In a tug of war, one team pulls left with 35 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
17. 17.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 3 (c) class 2
18. 18.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
19. 19.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
20. 20.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
21. 21.True or false: a rough doormat gives less friction. (a) False (b) True
22. 22.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
23. 23.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) less effort needed (d) the load floats
24. 24.🔍 Which is the odd one out? (a) a smooth steel slide (b) chalk on a gym bar (c) a tyre with deep treads (d) a box pushed on carpet
25. 25.💪 Two children push a box to the right, one with 25 N and the other with 60 N. What is the net (total) force on the box, in newtons?
26. 26.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) make new energy (c) use a smaller force (d) switch off gravity
27. 27.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) newton (N) (d) litre (L)
28. 28.💪 Two children push a box to the right, one with 15 N and the other with 30 N. What is the net (total) force on the box, in newtons?
29. 29.🏋️ A force of 430 N pushes a cart 5 m along the floor. How much work is done, in joules?
30. 30.True or false: a smooth steel slide gives more friction. (a) True (b) False
31. 31.True or false: pulling up your socks is a push. (a) True (b) False
32. 32.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, a glass sheet 3 N, a wooden plank 6 N, a carpet 10 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
34. 34.True or false: a water tap handle is a wedge. (a) True (b) False
35. 35.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
36. 36.⚙️ A wedge is … (a) two ramps back to back (b) a rope on a wheel (c) a wheel on a rod (d) a bar on a pivot
37. 37.True or false: a crane hook block is a pulley. (a) True (b) False
38. 38.True or false: a claw hammer on a nail is a pulley. (a) True (b) False
39. 39.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) the colour of rope (d) gravity
40. 40.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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