Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 699 · 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 fixed pulley needs effort = load. (a) False (b) True
2. 2.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
3. 3.💪 Which force is at work: lifting a school bag? (a) magnetic force (b) friction (c) gravity (d) muscular force
4. 4.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
5. 5.⚖️ A seesaw balances. Meena (180 N) sits 1 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?
6. 6.True or false: a beam balance is a class 2 lever (load in the middle). (a) False (b) True
7. 7.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
8. 8.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) True (b) False
9. 9.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) friction (c) muscular force (d) magnetic force
10. 10.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
11. 11.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) on the pivot (c) closer to the pivot (d) anywhere
12. 12.💪 Which force is at work: a thrown ball comes down? (a) muscular force (b) friction (c) gravity (d) magnetic force
13. 13.⚙️ Which simple machine is a wood screw? (a) pulley (b) inclined plane (c) screw (d) lever
14. 14.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Arjun (320 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
15. 15.⚖️ A lever bar balances. The load is 700 N at 10 cm from the fulcrum. The effort is ? N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
16. 16.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
17. 17.💪 Which can a force NOT do? (a) change its shape (b) start it moving (c) change its colour (d) stop it moving
18. 18.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 40 cm and the load at 80 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
19. 19.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
20. 20.⚙️ Which simple machine is an axe blade? (a) inclined plane (b) wedge (c) lever (d) wheel and axle
21. 21.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
22. 22.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, ice 3 N, a glass sheet 5 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
24. 24.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 30 N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 6 N, sandpaper 8 N, ice 4 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a wooden plank (d) a glass sheet
26. 26.🪝 A bucket weighing 330 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
27. 27.💪 Which force is at work: rain falls to the ground? (a) muscular force (b) friction (c) magnetic force (d) gravity
28. 28.💪 A cart is pulled to the right with 100 N and to the left with 95 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
29. 29.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
30. 30.⚖️ A lever bar balances. The load is 320 N at ? cm from the fulcrum. The effort is 80 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
31. 31.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
32. 32.True or false: an axe blade is a wheel and axle. (a) False (b) True
33. 33.⚙️ A wedge is … (a) a rope on a wheel (b) a bar on a pivot (c) a wheel on a rod (d) two ramps back to back
34. 34.🔍 Which is the odd one out? (a) a well winch handle (b) a flagpole rope wheel (c) a window blind cord (d) a crane hook block
35. 35.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) skating on ice (c) a wet tiled floor (d) a grippy rubber sole
36. 36.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) far from the fulcrum (c) near the fulcrum (d) on the fulcrum
37. 37.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
38. 38.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
39. 39.True or false: skating on ice gives less friction. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a nutcracker (c) a crowbar (d) a seesaw

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