Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 664 · 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.Which of these is a wedge? (a) a crowbar (b) a nutcracker (c) the tip of a nail (d) a steering wheel
2. 2.🏋️ Pushing a crate 1 m took 460 J of work. What force was used, in newtons?
3. 3.💪 A box weighs 560 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
4. 4.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
5. 5.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Arjun (160 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
7. 7.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
8. 8.💪 In a tug of war, one team pulls left with 75 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
9. 9.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
10. 10.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
11. 11.⚖️ A seesaw balances. Ravi (? N) sits 2 m from the pivot on one side; Kabir (380 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
12. 12.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
13. 13.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
14. 14.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 30 cm and the load at 80 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
15. 15.⚙️ Which simple machine is a flagpole rope wheel? (a) wedge (b) screw (c) pulley (d) inclined plane
16. 16.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the bar is short (d) the fulcrum moves
17. 17.True or false: a beam balance is a class 3 lever (effort in the middle). (a) True (b) False
18. 18.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
20. 20.⚙️ Which simple machine is the tip of a nail? (a) lever (b) wedge (c) wheel and axle (d) pulley
21. 21.🏋️ Pushing a crate 5 m took 200 J of work. What force was used, in newtons?
22. 22.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a truck loading ramp (c) a playground slide (d) a steering wheel
23. 23.True or false: opening a drawer is a push. (a) False (b) True
24. 24.⚖️ A seesaw balances. Meena (360 N) sits 3 m from the pivot on one side; Arjun (540 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
25. 25.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
26. 26.True or false: a smooth steel slide gives less friction. (a) False (b) True
27. 27.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) closer to the pivot (d) farther from the pivot
28. 28.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
29. 29.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
30. 30.True or false: a water tap handle is a wheel and axle. (a) False (b) True
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
32. 32.True or false: a box pushed on carpet gives more friction. (a) False (b) True
33. 33.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
34. 34.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
35. 35.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) nothing (d) the fulcrum
36. 36.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 3 (c) class 1
37. 37.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🔍 Which is the odd one out? (a) a crane hook block (b) a water tap handle (c) a flagpole rope wheel (d) a window blind cord
39. 39.💪 In a tug of war, one team pulls right with 50 N and the other pulls left with 45 N. What is the size of the net force, in newtons?
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3

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