Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 578 · 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.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
2. 2.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) more effort needed (d) the load floats
3. 3.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 12 (d) 6
4. 4.🔍 Which is the odd one out? (a) skating on ice (b) a smooth steel slide (c) chalk on a gym bar (d) powder on a carrom board
5. 5.True or false: a chisel is a wedge. (a) True (b) False
6. 6.💪 A box weighs 110 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, a glass sheet 1 N, a wooden plank 3 N, a carpet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
8. 8.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) on the rock (c) near the fulcrum (d) far from the fulcrum
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 7 N, a glass sheet 1 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
10. 10.True or false: pressing a doorbell is a push. (a) True (b) False
11. 11.⚖️ What is the pivot point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
12. 12.True or false: a nutcracker is a wedge. (a) True (b) False
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, a glass sheet 1 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
14. 14.True or false: kicking a football is a pull. (a) True (b) False
15. 15.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
16. 16.⚖️ A lever bar balances. The load is 420 N at 30 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?
17. 17.⚖️ A lever bar balances. The load is 420 N at 50 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?
18. 18.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
19. 19.⚖️ A seesaw balances. Asha (510 N) sits ? m from the pivot on one side; Kabir (680 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
20. 20.True or false: hitting a cricket ball is a pull. (a) False (b) True
21. 21.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) ice (d) polished marble
22. 22.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
23. 23.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
24. 24.True or false: opening a drawer is a pull. (a) False (b) True
25. 25.True or false: a rough doormat gives more friction. (a) False (b) True
26. 26.🏋️ A force of 300 N pushes a cart 9 m along the floor. How much work is done, in joules?
27. 27.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
28. 28.🪝 A load of 560 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 7 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) ice
30. 30.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
31. 31.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
32. 32.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) True (b) False
33. 33.True or false: a tyre with deep treads gives less friction. (a) True (b) False
34. 34.Which of these is a screw? (a) a window blind cord (b) a water tap handle (c) a door stopper (d) a jar lid
35. 35.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) friction (c) muscular force (d) magnetic force
36. 36.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) on the pivot (d) closer to the pivot
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 7 N, sandpaper 8 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
38. 38.⚖️ A seesaw balances. Asha (? N) sits 3 m from the pivot on one side; Kabir (390 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
39. 39.🔍 Which is the odd one out? (a) a playground slide (b) a road up a hill (c) a seesaw (d) a truck loading ramp
40. 40.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same

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