Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 47 · 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.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
2. 2.⚖️ A seesaw balances. Meena (300 N) sits 2 m from the pivot on one side; Zoya (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
3. 3.⚖️ A seesaw balances. Arjun (180 N) sits 2 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?
4. 4.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
5. 5.⚖️ A seesaw balances. Zoya (200 N) sits 4 m from the pivot on one side; Arjun (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🪝 A well winch has a handle (wheel) of radius 35 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
7. 7.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
8. 8.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 1 (c) class 2
9. 9.💪 Which force pulls everything towards the Earth? (a) magnetism (b) friction (c) wind (d) gravity
10. 10.💪 Which force is at work: a compass needle turns? (a) friction (b) muscular force (c) gravity (d) magnetic force
11. 11.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) near the fulcrum (c) far from the fulcrum (d) on the rock
12. 12.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
13. 13.⚖️ A seesaw balances. Arjun (? N) sits 2 m from the pivot on one side; Kabir (200 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
14. 14.Which of these is a pulley? (a) a flagpole rope wheel (b) a round doorknob (c) a steering wheel (d) a chisel
15. 15.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) False (b) True
16. 16.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
17. 17.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the direction of pull (d) the colour of rope
18. 18.⚖️ A lever bar balances. The load is 400 N at ? cm from the fulcrum. The effort is 200 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
19. 19.True or false: hitting a cricket ball is a pull. (a) False (b) True
20. 20.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
21. 21.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
22. 22.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
23. 23.⚙️ Which simple machine is a nut and bolt? (a) lever (b) inclined plane (c) wheel and axle (d) screw
24. 24.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
25. 25.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 1 (c) class 2
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 8 N, a carpet 9 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
27. 27.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
28. 28.🏋️ A force of 470 N did 3760 J of work. How many metres did the object move?
29. 29.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
30. 30.⚖️ Which class of lever is a crowbar? (a) class 3 (b) class 1 (c) class 2
31. 31.⚖️ A lever bar balances. The load is 180 N at ? cm from the fulcrum. The effort is 90 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
32. 32.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) a box pushed on carpet (d) a tyre with deep treads
33. 33.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
34. 34.🪝 A load of 140 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
35. 35.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 3 (c) class 2
36. 36.🔍 Which is the odd one out? (a) a rough doormat (b) chalk on a gym bar (c) a wheel on ball bearings (d) a box pushed on carpet
37. 37.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
38. 38.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 12 (c) 10 (d) 3
39. 39.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
40. 40.🔍 Which is the odd one out? (a) a crane hook block (b) a seesaw (c) a claw hammer on a nail (d) a bottle opener

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