Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 719 · 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.Which of these is a wedge? (a) a wood screw (b) the tip of a nail (c) a round doorknob (d) a wheelchair ramp
2. 2.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
3. 3.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
4. 4.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
5. 5.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
6. 6.⚖️ A lever bar balances. The load is 540 N at 50 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
7. 7.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
9. 9.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
10. 10.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
11. 11.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
12. 12.Which of these is caused by magnetic force? (a) a magnet picks up pins (b) brakes stop a bicycle (c) squeezing a lemon (d) pedalling a cycle
13. 13.💪 Which force is at work: lifting a school bag? (a) gravity (b) muscular force (c) magnetic force (d) friction
14. 14.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
15. 15.⚖️ A lever bar balances. The load is 240 N at ? cm from the fulcrum. The effort is 240 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
16. 16.⚖️ Which class of lever is a fishing rod? (a) class 1 (b) class 3 (c) class 2
17. 17.True or false: a nutcracker is a class 2 lever (load in the middle). (a) True (b) False
18. 18.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
20. 20.⚖️ A seesaw balances. Ravi (260 N) sits ? m from the pivot on one side; Arjun (390 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 3 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
22. 22.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a grippy rubber sole (c) a box pushed on carpet (d) chalk on a gym bar
23. 23.Which of these is a wheel and axle? (a) a water tap handle (b) a road up a hill (c) a flagpole rope wheel (d) a wood screw
24. 24.🛞 Friction acts … (a) only upwards (b) with the motion (c) against the motion (d) only on ice
25. 25.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 7 N, a glass sheet 1 N, a wooden plank 3 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
27. 27.True or false: hitting a cricket ball is a push. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) a chisel (b) a knife edge (c) a bottle opener (d) the tip of a nail
29. 29.True or false: a rough doormat gives less friction. (a) True (b) False
30. 30.🪝 A pulley system lifts a 560 N load with an effort of 140 N. What is its mechanical advantage (MA)?
31. 31.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
33. 33.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a wheel on ball bearings (c) a tyre with deep treads (d) a grippy rubber sole
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 6 N, sandpaper 7 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, sandpaper 13 N, ice 4 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
36. 36.True or false: a broom when sweeping is a class 3 lever (effort in the middle). (a) True (b) False
37. 37.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
38. 38.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
39. 39.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 10 (c) 3 (d) 6

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