Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 472 · 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 lever bar balances. The load is 900 N at 30 cm from the fulcrum. The effort is 300 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
2. 2.⚖️ A lever bar balances. The load is 100 N at 50 cm from the fulcrum. The effort is ? N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
4. 4.🪝 A bucket weighing 240 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
5. 5.💪 Is plucking a mango a push or a pull? (a) a push (b) a pull
6. 6.Which of these is caused by friction? (a) an apple falls down (b) brakes stop a bicycle (c) a fridge magnet sticks (d) a magnet picks up pins
7. 7.💪 A force is a … (a) unit of time (b) kind of colour (c) push or a pull (d) type of sound
8. 8.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
9. 9.⚙️ Which simple machine is a truck loading ramp? (a) wedge (b) pulley (c) inclined plane (d) lever
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 8 N, sandpaper 9 N, ice 2 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a glass sheet (d) sandpaper
11. 11.💪 A cart is pulled to the right with 50 N and to the left with 35 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
12. 12.True or false: pushing a trolley is a pull. (a) False (b) True
13. 13.True or false: a grippy rubber sole gives more friction. (a) True (b) False
14. 14.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
15. 15.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 10 (c) 3 (d) 12
16. 16.True or false: a seesaw is a class 3 lever (effort in the middle). (a) True (b) False
17. 17.⚖️ A seesaw balances. Ravi (570 N) sits 1 m from the pivot on one side; Meena (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a wooden plank 6 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) ice
19. 19.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
20. 20.Which of these is caused by gravity? (a) a fridge magnet sticks (b) a rolling ball slows (c) pedalling a cycle (d) rain falls to the ground
21. 21.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
22. 22.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) on the fulcrum (d) far from the fulcrum
23. 23.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 40 N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
24. 24.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
25. 25.💪 A cart is pulled to the right with 35 N and to the left with 25 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
26. 26.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 3 (c) class 2
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, a glass sheet 4 N, a wooden plank 8 N, a carpet 10 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
28. 28.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 200 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.⚖️ Which class of lever is a crowbar? (a) class 2 (b) class 3 (c) class 1
30. 30.🪝 A load of 280 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
31. 31.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 200 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.⚙️ Which simple machine is a window blind cord? (a) wheel and axle (b) lever (c) pulley (d) screw
33. 33.⚙️ Which simple machine is a playground slide? (a) lever (b) pulley (c) wedge (d) inclined plane
34. 34.🔍 Which is the odd one out? (a) powder on a carrom board (b) oil on a squeaky hinge (c) skating on ice (d) a tyre with deep treads
35. 35.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) a wet tiled floor (d) a grippy rubber sole
36. 36.⚖️ A lever bar balances. The load is 60 N at 30 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
37. 37.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
38. 38.⚖️ A seesaw balances. Arjun (? N) sits 2 m from the pivot on one side; Kabir (360 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
39. 39.⚖️ A lever bar balances. The load is 300 N at 50 cm from the fulcrum. The effort is 500 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
40. 40.💪 Which force is at work: lifting a school bag? (a) magnetic force (b) gravity (c) muscular force (d) friction

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