Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 333 · 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.⚙️ Which simple machine is a truck loading ramp? (a) wheel and axle (b) inclined plane (c) wedge (d) screw
2. 2.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the axle (c) the fulcrum (d) the effort
3. 3.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
4. 4.True or false: a nutcracker is a lever. (a) False (b) True
5. 5.Which of these is a wheel and axle? (a) a crowbar (b) a road up a hill (c) a nutcracker (d) a round doorknob
6. 6.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
7. 7.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to save rubber (d) to go slower
8. 8.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Meena (320 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
9. 9.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
10. 10.True or false: a water tap handle is a pulley. (a) True (b) False
11. 11.⚖️ In a class 1 lever, what is in the middle? (a) the fulcrum (b) nothing (c) the effort (d) the load
12. 12.Which of these is caused by muscular force? (a) a thrown ball comes down (b) squeezing a lemon (c) a river flows downhill (d) a rolling ball slows
13. 13.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
14. 14.🪝 More rope sections holding a load means … (a) no change (b) more effort needed (c) less effort needed (d) the load floats
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a carpet 9 N, sandpaper 13 N, ice 3 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
16. 16.⚖️ A seesaw balances. Zoya (120 N) sits 1 m from the pivot on one side; Meena (120 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
17. 17.⚙️ A wedge is … (a) a rope on a wheel (b) a wheel on a rod (c) two ramps back to back (d) a bar on a pivot
18. 18.⚖️ What is the pivot point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
19. 19.🪝 A bucket weighing 500 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
20. 20.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
21. 21.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.💪 A cart is pulled to the right with 95 N and to the left with 80 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
23. 23.💪 Two children push a box to the right, one with 85 N and the other with 40 N. What is the net (total) force on the box, in newtons?
24. 24.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
25. 25.Which of these is caused by magnetic force? (a) rain falls to the ground (b) a magnet picks up pins (c) a river flows downhill (d) a thrown ball comes down
26. 26.💪 Which force is at work: squeezing a lemon? (a) muscular force (b) gravity (c) magnetic force (d) friction
27. 27.💪 Two children push a box to the right, one with 45 N and the other with 25 N. What is the net (total) force on the box, in newtons?
28. 28.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) closer to the pivot (d) anywhere
29. 29.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
30. 30.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
31. 31.True or false: a flagpole rope wheel is a pulley. (a) False (b) True
32. 32.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
33. 33.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
34. 34.🔍 Which is the odd one out? (a) a playground slide (b) a crowbar (c) a truck loading ramp (d) a wheelchair ramp
35. 35.True or false: a smooth steel slide gives more friction. (a) True (b) False
36. 36.🪝 A bucket weighing 410 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
37. 37.True or false: a nutcracker is a wheel and axle. (a) False (b) True
38. 38.True or false: a smooth steel slide gives less friction. (a) True (b) False
39. 39.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) False (b) True
40. 40.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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