Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 23 · 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.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
2. 2.🪝 A load of 80 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
3. 3.Which of these is a pulley? (a) a round doorknob (b) a knife edge (c) a flagpole rope wheel (d) a bottle opener
4. 4.True or false: a wood screw is a wedge. (a) False (b) True
5. 5.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
6. 6.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
7. 7.🪝 A bucket weighing 460 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
8. 8.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
10. 10.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) polished marble (d) sandpaper
11. 11.Which of these is an inclined plane? (a) a crane hook block (b) a knife edge (c) a wood screw (d) a wheelchair ramp
12. 12.🏋️ Pushing a crate 7 m took 2450 J of work. What force was used, in newtons?
13. 13.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 1 (c) class 3
14. 14.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
15. 15.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
16. 16.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
17. 17.💪 Two children push a box to the right, one with 30 N and the other with 25 N. What is the net (total) force on the box, in newtons?
18. 18.True or false: a nutcracker is a class 1 lever (fulcrum in the middle). (a) True (b) False
19. 19.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
21. 21.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
22. 22.⚖️ A seesaw balances. Arjun (440 N) sits 1 m from the pivot on one side; Zoya (110 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
23. 23.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
24. 24.Which of these is a wedge? (a) a knife edge (b) a playground slide (c) a window blind cord (d) a bottle opener
25. 25.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
26. 26.💪 Which force pulls everything towards the Earth? (a) wind (b) friction (c) magnetism (d) gravity
27. 27.🪝 A winch has a wheel of radius 16 cm and an axle of radius 4 cm. What effort on the wheel lifts a 560 N bucket on the axle, in newtons? (ideal)
28. 28.⚙️ Which simple machine is a window blind cord? (a) pulley (b) lever (c) screw (d) inclined plane
29. 29.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
30. 30.💪 Which force is at work: pedalling a cycle? (a) muscular force (b) magnetic force (c) friction (d) gravity
31. 31.Which of these is a pulley? (a) a truck loading ramp (b) a bottle cap (c) a window blind cord (d) a steering wheel
32. 32.⚙️ Which simple machine is a jar lid? (a) inclined plane (b) lever (c) wheel and axle (d) screw
33. 33.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a grippy rubber sole (c) a rough doormat (d) a wheel on ball bearings
34. 34.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
35. 35.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) brakes stop a bicycle (c) a magnet picks up pins (d) lifting a school bag
36. 36.Which of these is a wheel and axle? (a) a chisel (b) a wheelchair ramp (c) a crane hook block (d) a round doorknob
37. 37.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
38. 38.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) gravity (d) the size of the load
39. 39.💪 Which can a force NOT do? (a) change its colour (b) change its shape (c) stop it moving (d) start it moving
40. 40.💪 Which force is at work: brakes stop a bicycle? (a) muscular force (b) gravity (c) friction (d) magnetic force

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