Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 545 · 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.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
2. 2.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.True or false: kicking a football is a pull. (a) True (b) False
4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
5. 5.True or false: sand on a slippery path gives more friction. (a) False (b) True
6. 6.💪 Two children push a box to the right, one with 35 N and the other with 100 N. What is the net (total) force on the box, in newtons?
7. 7.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
9. 9.⚙️ Which simple machine is a crane hook block? (a) wedge (b) pulley (c) lever (d) inclined plane
10. 10.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
11. 11.⚖️ A seesaw balances. Kabir (100 N) sits 1 m from the pivot on one side; Ravi (100 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
12. 12.💪 Which force is at work: rubbing hands warms them? (a) magnetic force (b) friction (c) gravity (d) muscular force
13. 13.True or false: a wheelchair ramp is an inclined plane. (a) False (b) True
14. 14.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
15. 15.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) far from the fulcrum (c) on the rock (d) on the fulcrum
16. 16.⚖️ A seesaw balances. Asha (400 N) sits 1 m from the pivot on one side; Ravi (100 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 12 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
18. 18.Which of these is a wheel and axle? (a) a wheelchair ramp (b) a steering wheel (c) a crowbar (d) an axe blade
19. 19.⚖️ A lever bar balances. The load is 20 N at ? cm from the fulcrum. The effort is 10 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.⚖️ A lever bar balances. The load is 640 N at ? cm from the fulcrum. The effort is 160 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.Which of these is caused by friction? (a) rain falls to the ground (b) an apple falls down (c) a magnet picks up pins (d) a rolling ball slows
22. 22.🔍 Which is the odd one out? (a) a truck loading ramp (b) a bottle cap (c) a screw jack (d) a wood screw
23. 23.🏋️ 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?
24. 24.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the colour of rope (d) the direction of pull
25. 25.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
26. 26.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
27. 27.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
28. 28.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
29. 29.⚖️ A lever bar balances. The load is ? N at 40 cm from the fulcrum. The effort is 40 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
30. 30.🔍 Which is the odd one out? (a) a well winch handle (b) a claw hammer on a nail (c) a crowbar (d) a seesaw
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 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) ice (c) a carpet (d) a wooden plank
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, a glass sheet 3 N, a wooden plank 6 N, a carpet 9 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
33. 33.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a jar lid (b) a bottle cap (c) a chisel (d) a nut and bolt
35. 35.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 100 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.⚙️ How many simple machines are there in the usual list? (a) 6 (b) 3 (c) 10 (d) 12
37. 37.⚖️ A seesaw balances. Asha (380 N) sits 1 m from the pivot on one side; Kabir (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
39. 39.⚖️ A lever bar balances. The load is ? N at 20 cm from the fulcrum. The effort is 20 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 8 N, sandpaper 12 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?

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