Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 515 · 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.💪 Two children push a box to the right, one with 60 N and the other with 60 N. What is the net (total) force on the box, in newtons?
2. 2.True or false: a flagpole rope wheel is a pulley. (a) True (b) False
3. 3.⚙️ Which simple machine is a nut and bolt? (a) inclined plane (b) lever (c) pulley (d) screw
4. 4.True or false: plucking a mango is a push. (a) False (b) True
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 2 N, a glass sheet 4 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
7. 7.Which of these is an inclined plane? (a) a round doorknob (b) a truck loading ramp (c) a nutcracker (d) a wood screw
8. 8.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
9. 9.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
10. 10.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) oil on a squeaky hinge (d) a box pushed on carpet
11. 11.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) ice
13. 13.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 400 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.True or false: a tyre with deep treads gives less friction. (a) True (b) False
15. 15.True or false: a box pushed on carpet gives less friction. (a) True (b) False
16. 16.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
17. 17.True or false: sand on a slippery path gives more friction. (a) False (b) True
18. 18.Which of these is caused by gravity? (a) squeezing a lemon (b) an apple falls down (c) a compass needle turns (d) a magnet picks up pins
19. 19.Which of these is a lever? (a) a knife edge (b) a wheelchair ramp (c) a claw hammer on a nail (d) a road up a hill
20. 20.🪝 A load of 120 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
21. 21.💪 A box weighs 240 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
22. 22.True or false: a smooth steel slide gives less friction. (a) False (b) True
23. 23.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
24. 24.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 1 N, a glass sheet 5 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) a carpet
26. 26.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
27. 27.⚖️ Turning effect = force × … (a) time taken (b) mass of fulcrum (c) distance from fulcrum (d) colour of bar
28. 28.⚖️ Along a straight bar, measured from the left end, the effort is at 90 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
29. 29.🪝 A bucket weighing 40 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
30. 30.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) gravity (d) the direction of pull
31. 31.💪 A cart is pulled to the right with 80 N and to the left with 70 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
32. 32.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) doubled (c) gravity (d) unbalanced
33. 33.💪 A bag has a mass of 29 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
34. 34.⚖️ A lever bar balances. The load is 500 N at ? cm from the fulcrum. The effort is 300 N at 50 cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
36. 36.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
37. 37.⚖️ A lever balances when … (a) turning effects match (b) the fulcrum moves (c) both weights are equal (d) the bar is short
38. 38.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull
39. 39.💪 Two children push a box to the right, one with 75 N and the other with 5 N. What is the net (total) force on the box, in newtons?
40. 40.⚖️ A lever bar balances. The load is 180 N at 50 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?

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