Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 920 · 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 500 N did 4500 J of work. How many metres did the object move?
2. 2.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) the direction of pull (d) gravity
3. 3.🛞 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 most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
4. 4.⚖️ What is the pivot point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
5. 5.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
7. 7.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
8. 8.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 6 (d) 10
9. 9.⚙️ A screw is really … (a) a ramp wrapped round (b) a bent lever (c) a tiny pulley (d) a kind of wheel
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, sandpaper 8 N, ice 2 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on ice?
11. 11.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the fulcrum (c) the effort (d) the pulley
12. 12.Which of these is an inclined plane? (a) a playground slide (b) a round doorknob (c) a bottle opener (d) a jar lid
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 3 N, a wooden plank 6 N, a carpet 10 N. How many newtons more were needed on sandpaper than on ice?
14. 14.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
15. 15.🪝 A bucket weighing 340 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
16. 16.🏋️ Pushing a crate 8 m took 3440 J of work. What force was used, in newtons?
17. 17.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
18. 18.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 1 (c) class 2
19. 19.⚖️ A lever bar balances. The load is 270 N at 50 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.⚙️ A wedge is … (a) two ramps back to back (b) a wheel on a rod (c) a rope on a wheel (d) a bar on a pivot
21. 21.True or false: closing a drawer is a push. (a) False (b) True
22. 22.💪 In which unit do we measure force? (a) litre (L) (b) metre (m) (c) newton (N) (d) second (s)
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.⚖️ Which class of lever is a pair of pliers? (a) class 1 (b) class 3 (c) class 2
25. 25.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
26. 26.True or false: a door stopper is an inclined plane. (a) False (b) True
27. 27.⚙️ Which simple machine is a well-bucket rope wheel? (a) wedge (b) wheel and axle (c) screw (d) pulley
28. 28.True or false: your forearm is a class 2 lever (load in the middle). (a) True (b) False
29. 29.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 2 (c) class 3
30. 30.💪 A bag has a mass of 32 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
31. 31.True or false: a bottle opener is a class 3 lever (effort in the middle). (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a round doorknob (b) a water tap handle (c) a steering wheel (d) a nut and bolt
33. 33.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a smaller rod (axle) (c) a sharp wedge (d) a loose rope
34. 34.🪝 A bucket weighing 420 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
35. 35.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
36. 36.🏋️ A force of 360 N pushes a cart 10 m along the floor. How much work is done, in joules?
37. 37.Which of these is a screw? (a) a well-bucket rope wheel (b) a seesaw (c) a flagpole rope wheel (d) a wood screw
38. 38.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
39. 39.⚖️ A seesaw balances. Zoya (330 N) sits ? m from the pivot on one side; Asha (220 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
40. 40.⚖️ A lever bar balances. The load is 20 N at 10 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?

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