Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 375 · 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.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
2. 2.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) farther from the pivot (c) closer to the pivot (d) anywhere
3. 3.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 3 (c) class 2
4. 4.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
5. 5.Which of these is a wheel and axle? (a) a crane hook block (b) a steering wheel (c) a seesaw (d) a truck loading ramp
6. 6.🏋️ Pushing a crate 6 m took 180 J of work. What force was used, in newtons?
7. 7.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
8. 8.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
9. 9.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) a grippy rubber sole (d) a box pushed on carpet
10. 10.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 270 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
11. 11.🏋️ A force of 220 N did 1100 J of work. How many metres did the object move?
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 7 N, sandpaper 10 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
13. 13.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
14. 14.💪 Which force is at work: a thrown ball comes down? (a) gravity (b) friction (c) muscular force (d) magnetic force
15. 15.True or false: a smooth steel slide gives less friction. (a) True (b) False
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a glass sheet 8 N, a carpet 9 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
17. 17.💪 A force is a … (a) type of sound (b) kind of colour (c) unit of time (d) push or a pull
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 10 N. How many newtons more were needed on a carpet than on ice?
19. 19.🪝 A bucket weighing 130 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.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
21. 21.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
22. 22.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 40 cm and the load at 80 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
23. 23.⚙️ Which simple machine is a nut and bolt? (a) wedge (b) screw (c) wheel and axle (d) lever
24. 24.⚖️ A lever bar balances. The load is 40 N at 30 cm from the fulcrum. The effort is ? N at 40 cm from the fulcrum on the other side. What is the missing force in newtons?
25. 25.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, a glass sheet 1 N, a wooden plank 3 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
27. 27.⚖️ A seesaw balances. Ravi (380 N) sits 3 m from the pivot on one side; Asha (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
28. 28.True or false: a seesaw is a class 2 lever (load in the middle). (a) False (b) True
29. 29.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) use a smaller force (c) make new energy (d) stop all friction
30. 30.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 11 N, ice 4 N, a glass sheet 7 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
32. 32.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 90 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
33. 33.True or false: a box pushed on carpet gives more friction. (a) True (b) False
34. 34.⚖️ Which class of lever is a pair of tweezers? (a) class 2 (b) class 1 (c) class 3
35. 35.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
36. 36.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a tyre with deep treads (c) sand on a slippery path (d) a smooth steel slide
37. 37.True or false: a crane hook block is a pulley. (a) False (b) True
38. 38.💪 A bag has a mass of 7 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
39. 39.💪 A box weighs 240 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
40. 40.⚙️ Which simple machine is a wheelchair ramp? (a) screw (b) wheel and axle (c) inclined plane (d) lever

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