Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 423 · 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 490 N did 3430 J of work. How many metres did the object move?
2. 2.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
3. 3.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) chalk on a gym bar (c) a wheel on ball bearings (d) a wet tiled floor
4. 4.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
5. 5.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
6. 6.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
7. 7.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
8. 8.💪 A box weighs 180 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
9. 9.True or false: sand on a slippery path gives more friction. (a) True (b) False
10. 10.⚖️ A seesaw balances. Zoya (320 N) sits ? m from the pivot on one side; Ravi (480 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
11. 11.💪 A force is a … (a) unit of time (b) type of sound (c) kind of colour (d) push or a pull
12. 12.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
13. 13.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
14. 14.💪 Which force is at work: rain falls to the ground? (a) friction (b) gravity (c) magnetic force (d) muscular force
15. 15.💪 Two children push a box to the right, one with 20 N and the other with 55 N. What is the net (total) force on the box, in newtons?
16. 16.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 6 (d) 12
17. 17.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
18. 18.💪 Which force is at work: rubbing hands warms them? (a) muscular force (b) gravity (c) friction (d) magnetic force
19. 19.⚙️ Which simple machine is a bottle cap? (a) lever (b) screw (c) inclined plane (d) pulley
20. 20.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 200 N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
21. 21.True or false: a tug of war is a push. (a) True (b) False
22. 22.True or false: a crowbar is a class 3 lever (effort in the middle). (a) True (b) False
23. 23.🏋️ A force of 280 N pushes a cart 9 m along the floor. How much work is done, in joules?
24. 24.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) make new energy (c) switch off gravity (d) use a smaller force
25. 25.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) wet (d) warm
26. 26.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
27. 27.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 60 N. What is the size of the net force, in newtons?
28. 28.⚖️ Which class of lever is a lemon squeezer? (a) class 3 (b) class 1 (c) class 2
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 7 N, sandpaper 10 N. Which surface gave the least friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
30. 30.🪝 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
31. 31.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) gravity (c) muscular force (d) friction
32. 32.True or false: a wet tiled floor gives less friction. (a) False (b) True
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 1 N, a wooden plank 4 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
34. 34.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the axle (c) the fulcrum (d) the load
35. 35.True or false: a screw jack is a screw. (a) False (b) True
36. 36.⚖️ 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?
37. 37.🔍 Which is the odd one out? (a) a wet tiled floor (b) a tyre with deep treads (c) a box pushed on carpet (d) a grippy rubber sole
38. 38.⚖️ A seesaw balances. Arjun (400 N) sits 1 m from the pivot on one side; Ravi (100 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
39. 39.Which of these is a lever? (a) a wood screw (b) a chisel (c) a well winch handle (d) a nutcracker
40. 40.💪 Which force is at work: lifting a school bag? (a) magnetic force (b) muscular force (c) friction (d) gravity

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