Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 862 · 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 machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
2. 2.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 90 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
3. 3.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
4. 4.⚖️ Turning effect = force × … (a) mass of fulcrum (b) time taken (c) distance from fulcrum (d) colour of bar
5. 5.🪝 A bucket weighing 340 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
6. 6.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 80 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
7. 7.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
8. 8.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
9. 9.⚖️ A lever bar balances. The load is 140 N at 20 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.Which of these is an inclined plane? (a) a bottle cap (b) a claw hammer on a nail (c) a flagpole rope wheel (d) a truck loading ramp
11. 11.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) nothing (c) the effort (d) the fulcrum
12. 12.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
13. 13.🏋️ A force of 350 N pushes a cart 9 m along the floor. How much work is done, in joules?
14. 14.💪 Which force is at work: a river flows downhill? (a) magnetic force (b) gravity (c) friction (d) muscular force
15. 15.Which of these is caused by muscular force? (a) pedalling a cycle (b) a rolling ball slows (c) shoes grip the floor (d) rubbing hands warms them
16. 16.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 6 (c) 10 (d) 3
17. 17.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
18. 18.True or false: opening a drawer is a push. (a) False (b) True
19. 19.⚙️ Which simple machine is a claw hammer on a nail? (a) pulley (b) wheel and axle (c) lever (d) wedge
20. 20.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
21. 21.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
22. 22.🪝 Fixed or movable pulley: which one halves the effort? (a) a movable pulley (b) a fixed pulley
23. 23.⚖️ A seesaw balances. Arjun (? N) sits 4 m from the pivot on one side; Ravi (680 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.⚖️ A seesaw balances. Arjun (140 N) sits ? m from the pivot on one side; Kabir (420 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
25. 25.True or false: sand on a slippery path gives less friction. (a) False (b) True
26. 26.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) less effort needed (d) the load floats
27. 27.⚙️ A wedge is … (a) two ramps back to back (b) a wheel on a rod (c) a rope on a wheel (d) a bar on a pivot
28. 28.💪 Which force pulls everything towards the Earth? (a) magnetism (b) friction (c) wind (d) gravity
29. 29.🏋️ A force of 480 N pushes a cart 5 m along the floor. How much work is done, in joules?
30. 30.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
31. 31.⚖️ A lever bar balances. The load is 500 N at 20 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?
32. 32.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
33. 33.True or false: kicking a football is a pull. (a) True (b) False
34. 34.⚖️ A seesaw balances. Meena (570 N) sits ? m from the pivot on one side; Arjun (570 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
35. 35.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) glass (d) sandpaper
36. 36.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) a smooth steel slide (d) chalk on a gym bar
37. 37.⚖️ A lever bar balances. The load is 320 N at ? cm from the fulcrum. The effort is 120 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 1 (c) class 2
39. 39.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) friction (c) magnetic force (d) muscular force
40. 40.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards

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