Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 772 · 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.⚖️ Turning effect = force × … (a) distance from fulcrum (b) time taken (c) colour of bar (d) mass of fulcrum
2. 2.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
3. 3.True or false: pushing a trolley is a pull. (a) False (b) True
4. 4.⚙️ Most simple machines make work easier by letting us … (a) make new energy (b) use a smaller force (c) stop all friction (d) switch off gravity
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 10 N, ice 2 N, a glass sheet 4 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
7. 7.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 1 N, a wooden plank 5 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
9. 9.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
10. 10.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
11. 11.⚙️ Which simple machine is a flagpole rope wheel? (a) lever (b) wedge (c) wheel and axle (d) pulley
12. 12.🪝 Fixed or movable pulley: which one rises with the load? (a) a fixed pulley (b) a movable pulley
13. 13.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
14. 14.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) True (b) False
15. 15.💪 Two children push a box to the right, one with 100 N and the other with 35 N. What is the net (total) force on the box, in newtons?
16. 16.🏋️ A force of 400 N did 2000 J of work. How many metres did the object move?
17. 17.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, ice 1 N, a glass sheet 3 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
19. 19.Which of these is a wheel and axle? (a) a truck loading ramp (b) a well winch handle (c) a claw hammer on a nail (d) a seesaw
20. 20.⚖️ What is the pivot point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
22. 22.Which of these is a lever? (a) a window blind cord (b) a nutcracker (c) a nut and bolt (d) a wood screw
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 7 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
24. 24.⚙️ Which simple machine is a well-bucket rope wheel? (a) inclined plane (b) wheel and axle (c) pulley (d) screw
25. 25.💪 Is pushing a trolley a push or a pull? (a) a pull (b) a push
26. 26.💪 In a tug of war, one team pulls left with 40 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
27. 27.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) a tyre with deep treads (d) sand on a slippery path
28. 28.True or false: a rough doormat gives less friction. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a wet tiled floor (b) a grippy rubber sole (c) oil on a squeaky hinge (d) powder on a carrom board
30. 30.🛞 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 7 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
31. 31.⚖️ A lever bar balances. The load is 150 N at ? cm from the fulcrum. The effort is 150 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
32. 32.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 10 (d) 6
33. 33.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) True (b) False
34. 34.💪 A force is a … (a) unit of time (b) type of sound (c) push or a pull (d) kind of colour
35. 35.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) two ramps back to back (d) a wheel on a rod
36. 36.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
37. 37.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a screw jack (c) a seesaw (d) a bottle opener
38. 38.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
40. 40.True or false: chalk on a gym bar gives more friction. (a) False (b) True

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