Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 324 · 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: an axe blade is a wheel and axle. (a) False (b) True
2. 2.True or false: a pair of tweezers is a class 1 lever (fulcrum in the middle). (a) False (b) True
3. 3.💪 Two children push a box to the right, one with 45 N and the other with 70 N. What is the net (total) force on the box, in newtons?
4. 4.💪 A cart is pulled to the right with 80 N and to the left with 65 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
5. 5.🔍 Which is the odd one out? (a) a smooth steel slide (b) a rough doormat (c) a tyre with deep treads (d) sand on a slippery path
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 2 N, a glass sheet 6 N, a wooden plank 10 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
7. 7.🏋️ Pushing a crate 10 m took 2600 J of work. What force was used, in newtons?
8. 8.Which of these is a pulley? (a) a bottle cap (b) a nutcracker (c) a well-bucket rope wheel (d) a nut and bolt
9. 9.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
10. 10.Which of these is a screw? (a) a bottle opener (b) a wood screw (c) a flagpole rope wheel (d) a claw hammer on a nail
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
12. 12.Which of these is a lever? (a) a claw hammer on a nail (b) a window blind cord (c) a bottle cap (d) a crane hook block
13. 13.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 50 cm and the load at 80 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
14. 14.💪 A cart is pulled to the right with 65 N and to the left with 55 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
15. 15.🏋️ A force of 500 N pushes a cart 2 m along the floor. How much work is done, in joules?
16. 16.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
17. 17.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
18. 18.⚖️ A seesaw balances. Zoya (540 N) sits 1 m from the pivot on one side; Arjun (180 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
19. 19.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
20. 20.🪝 A bucket weighing 60 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
21. 21.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
22. 22.⚙️ Which simple machine is a bottle cap? (a) screw (b) inclined plane (c) wheel and axle (d) lever
23. 23.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) ice (c) sandpaper (d) polished marble
24. 24.⚖️ A seesaw balances. Ravi (? N) sits 4 m from the pivot on one side; Meena (600 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
25. 25.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
26. 26.True or false: a smooth steel slide gives less friction. (a) False (b) True
27. 27.True or false: the tip of a nail is a screw. (a) True (b) False
28. 28.⚙️ Which simple machine is a flagpole rope wheel? (a) screw (b) pulley (c) wheel and axle (d) wedge
29. 29.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
30. 30.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
31. 31.Which of these is caused by magnetic force? (a) rain falls to the ground (b) a thrown ball comes down (c) shoes grip the floor (d) a fridge magnet sticks
32. 32.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
33. 33.⚖️ A seesaw balances. Kabir (340 N) sits ? m from the pivot on one side; Ravi (340 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, sandpaper 13 N, a glass sheet 3 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
35. 35.⚖️ A lever bar balances. The load is 270 N at 50 cm from the fulcrum. The effort is 450 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
37. 37.True or false: kicking a football is a pull. (a) False (b) True
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a wooden plank 4 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
39. 39.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a movable pulley (b) a fixed pulley
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 60 cm and the load at 10 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3

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