Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 739 · 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 pulley system lifts a 180 N load with an effort of 90 N. What is its mechanical advantage (MA)?
2. 2.⚖️ A lever balances when … (a) the bar is short (b) the fulcrum moves (c) both weights are equal (d) turning effects match
3. 3.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
4. 4.🪝 A well winch has a handle (wheel) of radius 40 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
5. 5.🏋️ Pushing a crate 6 m took 1140 J of work. What force was used, in newtons?
6. 6.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) True (b) False
7. 7.⚖️ 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
8. 8.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
9. 9.⚖️ A lever bar balances. The load is 720 N at ? cm from the fulcrum. The effort is 450 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
10. 10.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
11. 11.🏋️ A force of 110 N pushes a cart 4 m along the floor. How much work is done, in joules?
12. 12.⚖️ A seesaw balances. Arjun (480 N) sits ? m from the pivot on one side; Zoya (120 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
13. 13.🪝 A winch has a wheel of radius 8 cm and an axle of radius 2 cm. What effort on the wheel lifts a 280 N bucket on the axle, in newtons? (ideal)
14. 14.⚖️ Turning effect = force × … (a) colour of bar (b) distance from fulcrum (c) time taken (d) mass of fulcrum
15. 15.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
16. 16.⚙️ Which simple machine is a truck loading ramp? (a) screw (b) wedge (c) lever (d) inclined plane
17. 17.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) False (b) True
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 5 N, a wooden plank 9 N. How many newtons more were needed on sandpaper than on ice?
19. 19.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
20. 20.🏋️ A force of 360 N pushes a cart 8 m along the floor. How much work is done, in joules?
21. 21.⚙️ Which simple machine is a nut and bolt? (a) wheel and axle (b) screw (c) lever (d) wedge
22. 22.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
23. 23.Which of these is caused by friction? (a) lifting a school bag (b) a compass needle turns (c) rain falls to the ground (d) a rolling ball slows
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, a carpet 9 N, sandpaper 11 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
25. 25.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
26. 26.🏋️ A force of 110 N did 110 J of work. How many metres did the object move?
27. 27.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
28. 28.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 80 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
30. 30.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) closer to the pivot (c) farther from the pivot (d) on the pivot
31. 31.⚙️ Which simple machine is a nutcracker? (a) lever (b) pulley (c) screw (d) wheel and axle
32. 32.⚖️ A seesaw balances. Ravi (360 N) sits ? m from the pivot on one side; Arjun (120 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
33. 33.⚙️ Which simple machine is a well-bucket rope wheel? (a) screw (b) lever (c) pulley (d) inclined plane
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 11 N, a carpet 15 N, ice 4 N, a glass sheet 7 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) ice
35. 35.💪 In which unit do we measure force? (a) second (s) (b) newton (N) (c) litre (L) (d) metre (m)
36. 36.⚖️ A seesaw balances. Kabir (160 N) sits 2 m from the pivot on one side; Arjun (320 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
37. 37.⚖️ Which class of lever is your forearm? (a) class 2 (b) class 1 (c) class 3
38. 38.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 30 cm and the load at 90 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
40. 40.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction

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