Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 454 · 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.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 20 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
2. 2.💪 Which force pulls everything towards the Earth? (a) wind (b) friction (c) magnetism (d) gravity
3. 3.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
4. 4.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
5. 5.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
6. 6.🪝 A bucket weighing 400 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
7. 7.Which of these is a pulley? (a) a door stopper (b) a water tap handle (c) a well-bucket rope wheel (d) a crowbar
8. 8.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
9. 9.True or false: hitting a cricket ball is a pull. (a) True (b) False
10. 10.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
11. 11.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
12. 12.⚙️ Which simple machine is a claw hammer on a nail? (a) wheel and axle (b) inclined plane (c) lever (d) pulley
13. 13.🏋️ A force of 470 N did 470 J of work. How many metres did the object move?
14. 14.⚖️ A seesaw balances. Ravi (160 N) sits 4 m from the pivot on one side; Zoya (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 1 (b) class 2 (c) class 3
16. 16.True or false: pulling up your socks is a push. (a) False (b) True
17. 17.🏋️ A force of 120 N pushes a cart 5 m along the floor. How much work is done, in joules?
18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
19. 19.🔍 Which is the odd one out? (a) a rough doormat (b) sand on a slippery path (c) a box pushed on carpet (d) a smooth steel slide
20. 20.🪝 A winch has a wheel of radius 15 cm and an axle of radius 5 cm. What effort on the wheel lifts a 540 N bucket on the axle, in newtons? (ideal)
21. 21.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.Which of these is a screw? (a) a truck loading ramp (b) an axe blade (c) a crowbar (d) a bottle cap
23. 23.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
24. 24.💪 Two children push a box to the right, one with 45 N and the other with 15 N. What is the net (total) force on the box, in newtons?
25. 25.🪝 A pulley system lifts an 80 N load with an effort of 40 N. What is its mechanical advantage (MA)?
26. 26.💪 A cart is pulled to the right with 55 N and to the left with 65 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
27. 27.True or false: plucking a mango is a pull. (a) True (b) False
28. 28.True or false: a tug of war is a push. (a) False (b) True
29. 29.⚙️ Which simple machine is a round doorknob? (a) wedge (b) wheel and axle (c) pulley (d) lever
30. 30.True or false: a grippy rubber sole gives less friction. (a) True (b) False
31. 31.🏋️ Pushing a crate 1 m took 480 J of work. What force was used, in newtons?
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, sandpaper 14 N, ice 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
33. 33.⚖️ A seesaw balances. Arjun (190 N) sits ? m from the pivot on one side; Asha (760 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
34. 34.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
35. 35.⚙️ Which simple machine is a well-bucket rope wheel? (a) wheel and axle (b) wedge (c) pulley (d) inclined plane
36. 36.Which of these is caused by muscular force? (a) a river flows downhill (b) squeezing a lemon (c) shoes grip the floor (d) rain falls to the ground
37. 37.🔍 Which is the odd one out? (a) a round doorknob (b) a well winch handle (c) a wheelchair ramp (d) a water tap handle
38. 38.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 3 (c) class 2
39. 39.⚙️ Which simple machine is a wheelchair ramp? (a) lever (b) wedge (c) screw (d) inclined plane
40. 40.🔍 Which is the odd one out? (a) a water tap handle (b) a round doorknob (c) a well-bucket rope wheel (d) a well winch handle

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