Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 118 · 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.True or false: a round doorknob is a wheel and axle. (a) True (b) False
2. 2.⚙️ Which simple machine is a crowbar? (a) inclined plane (b) pulley (c) lever (d) wheel and axle
3. 3.🪝 A load of 120 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
4. 4.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
6. 6.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
7. 7.🛞 Friction acts … (a) with the motion (b) against the motion (c) only upwards (d) only on ice
8. 8.🔍 Which is the odd one out? (a) an axe blade (b) a crowbar (c) a nutcracker (d) a claw hammer on a nail
9. 9.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 50 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
11. 11.💪 In a tug of war, one team pulls right with 40 N and the other pulls left with 20 N. What is the size of the net force, in newtons?
12. 12.Which of these is a wedge? (a) a well-bucket rope wheel (b) a chisel (c) a nutcracker (d) a water tap handle
13. 13.⚖️ A seesaw balances. Asha (510 N) sits ? m from the pivot on one side; Zoya (680 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
14. 14.💪 Two children push a box to the right, one with 55 N and the other with 60 N. What is the net (total) force on the box, in newtons?
15. 15.⚖️ A seesaw balances. Zoya (800 N) sits 4 m from the pivot on one side; Kabir (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
16. 16.True or false: pushing a swing is a pull. (a) True (b) False
17. 17.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its shape (d) change its colour
18. 18.True or false: a grippy rubber sole gives less friction. (a) True (b) False
19. 19.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
20. 20.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) oil on a squeaky hinge (d) chalk on a gym bar
21. 21.🪝 A load of 750 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 15 N, ice 4 N, a glass sheet 7 N, a wooden plank 11 N. How many newtons more were needed on sandpaper than on ice?
23. 23.🪝 A bucket weighing 30 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
24. 24.⚖️ A seesaw balances. Zoya (? N) sits 3 m from the pivot on one side; Arjun (390 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.⚖️ Which class of lever is a wheelbarrow? (a) class 2 (b) class 3 (c) class 1
26. 26.⚖️ A lever bar balances. The load is 160 N at 50 cm from the fulcrum. The effort is 100 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
27. 27.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
28. 28.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) chalk on a gym bar (c) skating on ice (d) a wheel on ball bearings
29. 29.⚖️ What is the pivot point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
30. 30.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) sand on a slippery path (d) a grippy rubber sole
31. 31.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
32. 32.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
33. 33.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a ramp wrapped round (d) a kind of wheel
34. 34.True or false: a fixed pulley needs effort = load. (a) False (b) True
35. 35.Which of these is a wheel and axle? (a) a knife edge (b) a well winch handle (c) a truck loading ramp (d) a nut and bolt
36. 36.🪝 A pulley system lifts a 330 N load with an effort of 110 N. What is its mechanical advantage (MA)?
37. 37.💪 A bag has a mass of 53 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
38. 38.⚖️ Which class of lever is a nutcracker? (a) class 3 (b) class 2 (c) class 1
39. 39.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a playground slide (c) a wood screw (d) a road up a hill
40. 40.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Ravi (180 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?

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