Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 53 · 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 cart is pulled to the right with 35 N and to the left with 50 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
2. 2.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 12 (d) 6
3. 3.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a loose rope (c) a smaller rod (axle) (d) a flat ramp
4. 4.🪝 A well winch has a handle (wheel) of radius 16 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
5. 5.🪝 A pulley system lifts an 880 N load with an effort of 220 N. What is its mechanical advantage (MA)?
6. 6.⚙️ Which simple machine is a wood screw? (a) wheel and axle (b) pulley (c) screw (d) lever
7. 7.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
8. 8.True or false: a crane hook block is a pulley. (a) True (b) False
9. 9.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
10. 10.True or false: drawing up a well bucket is a pull. (a) True (b) False
11. 11.⚙️ A wedge is … (a) a wheel on a rod (b) a bar on a pivot (c) two ramps back to back (d) a rope on a wheel
12. 12.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) ice
14. 14.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 3 (c) class 1
15. 15.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
16. 16.Which of these is caused by muscular force? (a) a river flows downhill (b) lifting a school bag (c) shoes grip the floor (d) rubbing hands warms them
17. 17.🛞 Why are tyres made with deep treads? (a) to go slower (b) to save rubber (c) to look nice (d) to grip the road
18. 18.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) closer to the pivot (d) on the pivot
19. 19.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
20. 20.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) oil on a squeaky hinge (c) powder on a carrom board (d) chalk on a gym bar
21. 21.💪 Which force is at work: a thrown ball comes down? (a) friction (b) magnetic force (c) muscular force (d) gravity
22. 22.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) a rough doormat (d) a wet tiled floor
24. 24.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
25. 25.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
26. 26.True or false: a grippy rubber sole gives more friction. (a) False (b) True
27. 27.True or false: opening a drawer is a pull. (a) False (b) True
28. 28.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
29. 29.⚖️ A lever bar balances. The load is 90 N at ? cm from the fulcrum. The effort is 40 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 10 N, a carpet 11 N. How many newtons more were needed on a carpet than on ice?
33. 33.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a ramp wrapped round (d) a kind of wheel
34. 34.⚖️ A lever bar balances. The load is 630 N at ? cm from the fulcrum. The effort is 280 N at 90 cm from the fulcrum on the other side. What is the missing distance in centimetres?
35. 35.⚖️ In a class 3 lever, what is in the middle? (a) the load (b) the effort (c) the pulley (d) the fulcrum
36. 36.🪝 A pulley system lifts a 120 N load with an effort of 40 N. What is its mechanical advantage (MA)?
37. 37.⚖️ A seesaw balances. Zoya (150 N) sits 4 m from the pivot on one side; Arjun (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.🔍 Which is the odd one out? (a) a smooth steel slide (b) powder on a carrom board (c) a tyre with deep treads (d) a wheel on ball bearings
39. 39.⚖️ A seesaw balances. Meena (340 N) sits ? m from the pivot on one side; Zoya (680 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
40. 40.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?

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