Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 177 · 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 screw is really … (a) a kind of wheel (b) a tiny pulley (c) a bent lever (d) a ramp wrapped round
2. 2.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
3. 3.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
4. 4.🪝 A load of 520 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
5. 5.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
6. 6.True or false: a smooth steel slide gives more friction. (a) True (b) False
7. 7.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
8. 8.⚖️ A seesaw balances. Asha (330 N) sits ? m from the pivot on one side; Meena (330 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
9. 9.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
10. 10.Which of these is caused by gravity? (a) pedalling a cycle (b) a compass needle turns (c) an apple falls down (d) brakes stop a bicycle
11. 11.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
12. 12.⚙️ Which simple machine is a well-bucket rope wheel? (a) inclined plane (b) lever (c) pulley (d) wheel and axle
13. 13.💪 Which force is at work: an apple falls down? (a) muscular force (b) magnetic force (c) gravity (d) friction
14. 14.💪 Two children push a box to the right, one with 70 N and the other with 55 N. What is the net (total) force on the box, in newtons?
15. 15.⚖️ A lever bar balances. The load is 280 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?
16. 16.🪝 A pulley system lifts a 200 N load with an effort of 50 N. What is its mechanical advantage (MA)?
17. 17.Which of these is caused by gravity? (a) squeezing a lemon (b) a rolling ball slows (c) rubbing hands warms them (d) rain falls to the ground
18. 18.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
19. 19.⚙️ Which simple machine is a round doorknob? (a) pulley (b) lever (c) inclined plane (d) wheel and axle
20. 20.💪 Which force is at work: a thrown ball comes down? (a) magnetic force (b) friction (c) gravity (d) muscular force
21. 21.⚙️ Which simple machine is the tip of a nail? (a) lever (b) wedge (c) wheel and axle (d) screw
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 10 N, a carpet 14 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
23. 23.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
24. 24.True or false: a nutcracker is a wedge. (a) False (b) True
25. 25.💪 Which can a force NOT do? (a) change its colour (b) start it moving (c) change its shape (d) stop it moving
26. 26.⚖️ In a class 2 lever, what is in the middle? (a) the axle (b) the effort (c) the load (d) the fulcrum
27. 27.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
28. 28.True or false: a round doorknob is an inclined plane. (a) True (b) False
29. 29.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
30. 30.⚖️ A seesaw balances. Asha (170 N) sits 1 m from the pivot on one side; Arjun (170 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
31. 31.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
32. 32.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) far from the fulcrum (c) on the fulcrum (d) on the rock
33. 33.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
34. 34.Which of these is a lever? (a) a door stopper (b) a water tap handle (c) a crane hook block (d) a crowbar
35. 35.🪝 A winch has a wheel of radius 28 cm and an axle of radius 4 cm. What effort on the wheel lifts a 1120 N bucket on the axle, in newtons? (ideal)
36. 36.True or false: a door stopper is a wedge. (a) True (b) False
37. 37.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
38. 38.🏋️ A force of 300 N pushes a cart 9 m along the floor. How much work is done, in joules?
39. 39.⚙️ Which simple machine is a seesaw? (a) lever (b) wedge (c) wheel and axle (d) inclined plane
40. 40.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort

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