Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 747 · 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 seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Meena (480 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
2. 2.🏋️ A force of 300 N did 1800 J of work. How many metres did the object move?
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 10 N, sandpaper 12 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
4. 4.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
5. 5.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the colour of rope (d) the direction of pull
6. 6.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
7. 7.🏋️ Pushing a crate 4 m took 1280 J of work. What force was used, in newtons?
8. 8.🏋️ A force of 320 N did 640 J of work. How many metres did the object move?
9. 9.⚖️ 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 3 (c) class 2
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, ice 2 N, a glass sheet 4 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
11. 11.⚙️ Which simple machine is the tip of a nail? (a) lever (b) wedge (c) wheel and axle (d) inclined plane
12. 12.🪝 A bucket weighing 330 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
13. 13.🪝 A load of 480 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
14. 14.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 2 (c) class 1
15. 15.Which of these is caused by gravity? (a) rubbing hands warms them (b) a fridge magnet sticks (c) brakes stop a bicycle (d) an apple falls down
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 9 N, sandpaper 12 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
17. 17.True or false: pushing a trolley is a push. (a) False (b) True
18. 18.💪 A bag has a mass of 38 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
19. 19.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 6 (c) 3 (d) 10
20. 20.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) chalk on a gym bar (d) oil on a squeaky hinge
21. 21.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a well-bucket rope wheel (c) a truck loading ramp (d) a playground slide
22. 22.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
23. 23.🪝 More rope sections holding a load means … (a) the load floats (b) no change (c) more effort needed (d) less effort needed
24. 24.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) glass (d) polished marble
25. 25.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
26. 26.Which of these is caused by muscular force? (a) shoes grip the floor (b) brakes stop a bicycle (c) rain falls to the ground (d) pedalling a cycle
27. 27.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
28. 28.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
29. 29.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) on the rock (c) far from the fulcrum (d) near the fulcrum
30. 30.True or false: a steering wheel is a wheel and axle. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) a jar lid (b) a wood screw (c) a bottle opener (d) a bottle cap
32. 32.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) True (b) False
33. 33.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
34. 34.🛞 Friction acts … (a) only upwards (b) with the motion (c) only on ice (d) against the motion
35. 35.True or false: a door stopper is a wheel and axle. (a) False (b) True
36. 36.⚙️ Which simple machine is a bottle cap? (a) lever (b) inclined plane (c) pulley (d) screw
37. 37.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
39. 39.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
40. 40.💪 A force is a … (a) kind of colour (b) type of sound (c) push or a pull (d) unit of time

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