Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 391 · 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: pulling a cart is a pull. (a) False (b) True
2. 2.True or false: a chisel is a wedge. (a) True (b) False
3. 3.⚖️ A seesaw balances. Zoya (520 N) sits 1 m from the pivot on one side; Arjun (130 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
4. 4.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
5. 5.🪝 A pulley system lifts a 1040 N load with an effort of 260 N. What is its mechanical advantage (MA)?
6. 6.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
7. 7.💪 In which unit do we measure force? (a) second (s) (b) newton (N) (c) litre (L) (d) metre (m)
8. 8.True or false: a pair of kitchen tongs is a class 1 lever (fulcrum in the middle). (a) False (b) True
9. 9.True or false: pulling up your socks is a push. (a) True (b) False
10. 10.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
11. 11.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
12. 12.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
13. 13.🪝 A pulley system lifts a 240 N load with an effort of 80 N. What is its mechanical advantage (MA)?
14. 14.Which of these is a wedge? (a) a nutcracker (b) a well winch handle (c) a wood screw (d) a door stopper
15. 15.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 60 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.⚖️ A seesaw balances. Asha (? N) sits 4 m from the pivot on one side; Ravi (600 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 2 (c) class 1
18. 18.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
19. 19.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
20. 20.💪 A cart is pulled to the right with 85 N and to the left with 95 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
21. 21.💪 A bag has a mass of 10 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
22. 22.Which of these is a screw? (a) a door stopper (b) a flagpole rope wheel (c) a truck loading ramp (d) a wood screw
23. 23.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) both weights are equal (d) the fulcrum moves
24. 24.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
25. 25.⚙️ Which simple machine is a claw hammer on a nail? (a) pulley (b) lever (c) screw (d) wedge
26. 26.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
27. 27.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 1 (c) class 3
28. 28.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
30. 30.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
31. 31.⚙️ A screw is really … (a) a bent lever (b) a kind of wheel (c) a tiny pulley (d) a ramp wrapped round
32. 32.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a flagpole rope wheel (c) a crane hook block (d) a truck loading ramp
33. 33.⚖️ A lever bar balances. The load is 270 N at ? cm from the fulcrum. The effort is 360 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) less effort needed (d) more effort needed
35. 35.⚖️ A seesaw balances. Ravi (440 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?
36. 36.True or false: a crowbar is a lever. (a) False (b) True
37. 37.🪝 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)
38. 38.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
39. 39.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) on the pivot (d) anywhere
40. 40.💪 Is opening a drawer a push or a pull? (a) a push (b) a pull

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