Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 980 · 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.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) newton (N) (d) second (s)
2. 2.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
3. 3.⚖️ A seesaw balances. Asha (? N) sits 4 m from the pivot on one side; Kabir (560 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
4. 4.True or false: a nutcracker is a class 2 lever (load in the middle). (a) False (b) True
5. 5.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
6. 6.💪 Two children push a box to the right, one with 10 N and the other with 65 N. What is the net (total) force on the box, in newtons?
7. 7.True or false: sand on a slippery path gives more friction. (a) False (b) True
8. 8.True or false: a movable pulley only changes direction. (a) False (b) True
9. 9.⚖️ Which class of lever is a lemon squeezer? (a) class 2 (b) class 3 (c) class 1
10. 10.⚙️ Which simple machine is the tip of a nail? (a) pulley (b) wedge (c) lever (d) inclined plane
11. 11.💪 Which force is at work: pedalling a cycle? (a) muscular force (b) magnetic force (c) gravity (d) friction
12. 12.⚖️ A seesaw balances. Ravi (450 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?
13. 13.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the fulcrum (c) nothing (d) the effort
14. 14.True or false: a pair of kitchen tongs is a class 3 lever (effort in the middle). (a) True (b) False
15. 15.⚙️ Which simple machine is a truck loading ramp? (a) screw (b) wedge (c) inclined plane (d) wheel and axle
16. 16.⚖️ A seesaw balances. Zoya (170 N) sits 4 m from the pivot on one side; Asha (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
17. 17.True or false: a rough doormat gives more friction. (a) False (b) True
18. 18.Which of these is a wheel and axle? (a) a round doorknob (b) a screw jack (c) a road up a hill (d) a bottle opener
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a carpet 6 N, sandpaper 8 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
20. 20.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
21. 21.Which of these is caused by magnetic force? (a) an apple falls down (b) a compass needle turns (c) a river flows downhill (d) brakes stop a bicycle
22. 22.🪝 A load of 1160 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
23. 23.⚖️ A seesaw balances. Meena (280 N) sits 2 m from the pivot on one side; Zoya (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) on the pivot (c) farther from the pivot (d) anywhere
25. 25.Which of these is a screw? (a) a bottle opener (b) a playground slide (c) an axe blade (d) a jar lid
26. 26.💪 Is pulling a cart a push or a pull? (a) a pull (b) a push
27. 27.Which of these is an inclined plane? (a) a wheelchair ramp (b) a nutcracker (c) a seesaw (d) a window blind cord
28. 28.🪝 A pulley system lifts a 510 N load with an effort of 170 N. What is its mechanical advantage (MA)?
29. 29.⚖️ A seesaw balances. Zoya (570 N) sits 4 m from the pivot on one side; Arjun (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.True or false: sand on a slippery path gives less friction. (a) False (b) True
31. 31.Which of these is caused by gravity? (a) rain falls to the ground (b) pedalling a cycle (c) squeezing a lemon (d) a rolling ball slows
32. 32.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to go slower (d) to grip the road
33. 33.⚖️ A seesaw balances. Zoya (130 N) sits 3 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?
34. 34.⚙️ Which simple machine is a seesaw? (a) wedge (b) lever (c) screw (d) inclined plane
35. 35.⚖️ A lever bar balances. The load is 30 N at 50 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.💪 In a tug of war, one team pulls left with 85 N and the other pulls right with 75 N. What is the size of the net force, in newtons?
37. 37.🔍 Which is the odd one out? (a) a wet tiled floor (b) a rough doormat (c) chalk on a gym bar (d) a grippy rubber sole
38. 38.💪 In a tug of war, one team pulls left with 45 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
39. 39.🔍 Which is the odd one out? (a) powder on a carrom board (b) a box pushed on carpet (c) a wet tiled floor (d) oil on a squeaky hinge
40. 40.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 60 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?

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