Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 737 · 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 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?
2. 2.True or false: a beam balance is a class 3 lever (effort in the middle). (a) False (b) True
3. 3.💪 In a tug of war, one team pulls right with 35 N and the other pulls left with 25 N. What is the size of the net force, in newtons?
4. 4.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
5. 5.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
6. 6.⚙️ Which simple machine is a seesaw? (a) screw (b) lever (c) pulley (d) wedge
7. 7.⚖️ A lever balances when … (a) the fulcrum moves (b) turning effects match (c) the bar is short (d) both weights are equal
8. 8.💪 Which force is at work: rubbing hands warms them? (a) gravity (b) muscular force (c) magnetic force (d) friction
9. 9.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?
10. 10.True or false: a fixed pulley stays in one place. (a) True (b) False
11. 11.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
12. 12.🪝 A pulley system lifts a 780 N load with an effort of 260 N. What is its mechanical advantage (MA)?
13. 13.💪 Two equal forces push on a box from opposite sides. They are … (a) gravity (b) unbalanced (c) doubled (d) balanced
14. 14.💪 Which force is at work: a river flows downhill? (a) gravity (b) magnetic force (c) friction (d) muscular force
15. 15.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) the load (c) nothing (d) the effort
16. 16.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
17. 17.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
18. 18.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a chisel (c) a knife edge (d) the tip of a nail
19. 19.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) press parts harder (d) make parts rough
20. 20.⚖️ Which class of lever is a pair of pliers? (a) class 1 (b) class 2 (c) class 3
21. 21.True or false: a fixed pulley rises with the load. (a) True (b) False
22. 22.💪 A box weighs 350 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
23. 23.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
24. 24.Which of these is a lever? (a) a wheelchair ramp (b) a crane hook block (c) a chisel (d) a claw hammer on a nail
25. 25.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 1 (c) class 3
26. 26.🏋️ A force of 350 N did 1050 J of work. How many metres did the object move?
27. 27.True or false: chalk on a gym bar gives less friction. (a) True (b) False
28. 28.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
29. 29.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
30. 30.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
31. 31.⚖️ A seesaw balances. Meena (480 N) sits 4 m from the pivot on one side; Arjun (480 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
32. 32.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.⚙️ Which simple machine is a window blind cord? (a) pulley (b) wheel and axle (c) screw (d) lever
34. 34.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 10 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) second (s) (d) metre (m)
36. 36.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
37. 37.True or false: a smooth steel slide gives more friction. (a) True (b) False
38. 38.True or false: a movable pulley rises with the load. (a) True (b) False
39. 39.⚖️ A seesaw balances. Ravi (600 N) sits 1 m from the pivot on one side; Zoya (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.🔍 Which is the odd one out? (a) a seesaw (b) a crowbar (c) a claw hammer on a nail (d) a nut and bolt

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