Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 463 · 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 wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a flat ramp (c) a smaller rod (axle) (d) a loose rope
2. 2.⚙️ Which simple machine is a flagpole rope wheel? (a) pulley (b) inclined plane (c) screw (d) wheel and axle
3. 3.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 3 N, a glass sheet 5 N, a wooden plank 8 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a wooden plank
5. 5.🏋️ A force of 330 N did 1650 J of work. How many metres did the object move?
6. 6.🔍 Which is the odd one out? (a) a chisel (b) an axe blade (c) a knife edge (d) a crowbar
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 3 (b) class 2 (c) class 1
8. 8.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) True (b) False
9. 9.🪝 A load of 540 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
10. 10.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) sand on a slippery path (d) powder on a carrom board
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 80 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
12. 12.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
13. 13.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
14. 14.⚙️ Which simple machine is a seesaw? (a) wheel and axle (b) inclined plane (c) lever (d) screw
15. 15.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
16. 16.⚖️ A lever bar balances. The load is 630 N at 40 cm from the fulcrum. The effort is ? N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
18. 18.💪 Which force pulls everything towards the Earth? (a) friction (b) gravity (c) wind (d) magnetism
19. 19.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
20. 20.🔍 Which is the odd one out? (a) a road up a hill (b) a water tap handle (c) a playground slide (d) a wheelchair ramp
21. 21.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) a tyre with deep treads (d) chalk on a gym bar
22. 22.💪 A box weighs 470 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
23. 23.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
24. 24.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
25. 25.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N, ice 2 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) ice
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a carpet 6 N, sandpaper 8 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 7 N, sandpaper 8 N, ice 4 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
29. 29.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
30. 30.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) glass (d) polished marble
31. 31.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
32. 32.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
33. 33.💪 A force is a … (a) kind of colour (b) type of sound (c) push or a pull (d) unit of time
34. 34.💪 Which force is at work: a thrown ball comes down? (a) muscular force (b) friction (c) gravity (d) magnetic force
35. 35.⚙️ Which simple machine is a round doorknob? (a) wheel and axle (b) wedge (c) inclined plane (d) lever
36. 36.💪 A box weighs 350 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
37. 37.🔍 Which is the odd one out? (a) chalk on a gym bar (b) sand on a slippery path (c) a tyre with deep treads (d) a wet tiled floor
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
39. 39.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 12 (c) 10 (d) 3
40. 40.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 160 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids