Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 736 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 3 N, a carpet 7 N, sandpaper 9 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
2. 2.Which of these is a pulley? (a) a knife edge (b) an axe blade (c) a well-bucket rope wheel (d) a bottle opener
3. 3.💪 Two children push a box to the right, one with 50 N and the other with 60 N. What is the net (total) force on the box, in newtons?
4. 4.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 4 m, how many metres of rope must you pull?
5. 5.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 20 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
6. 6.⚖️ Turning effect = force × … (a) distance from fulcrum (b) colour of bar (c) mass of fulcrum (d) time taken
7. 7.⚙️ A wedge is … (a) a wheel on a rod (b) a bar on a pivot (c) two ramps back to back (d) a rope on a wheel
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 100 cm and the load at 70 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
9. 9.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull
10. 10.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a wheel on ball bearings (c) a wet tiled floor (d) oil on a squeaky hinge
11. 11.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
12. 12.Which of these is caused by friction? (a) a rolling ball slows (b) a fridge magnet sticks (c) lifting a school bag (d) a thrown ball comes down
13. 13.⚖️ A lever bar balances. The load is 240 N at ? cm from the fulcrum. The effort is 30 N at 80 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.True or false: a wheelchair ramp is an inclined plane. (a) True (b) False
15. 15.Which of these is a lever? (a) a nutcracker (b) a chisel (c) a wood screw (d) the tip of a nail
16. 16.🔍 Which is the odd one out? (a) a well winch handle (b) a door stopper (c) a water tap handle (d) a steering wheel
17. 17.⚖️ What is the pivot point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 9 N, a carpet 11 N, ice 2 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) a carpet
19. 19.💪 Which can a force NOT do? (a) change its colour (b) change its shape (c) start it moving (d) stop it moving
20. 20.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
21. 21.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
22. 22.💪 A bag has a mass of 22 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a glass sheet 4 N, a carpet 7 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
24. 24.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 2 (c) class 1
25. 25.True or false: a movable pulley stays in one place. (a) False (b) True
26. 26.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
27. 27.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the load (c) nothing (d) the fulcrum
28. 28.💪 A force is a … (a) push or a pull (b) kind of colour (c) type of sound (d) unit of time
29. 29.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
30. 30.True or false: a nutcracker is a class 2 lever (load in the middle). (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a grippy rubber sole (c) sand on a slippery path (d) powder on a carrom board
32. 32.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
33. 33.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
34. 34.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Meena (190 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
35. 35.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 10 (d) 6
36. 36.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 7 N, a carpet 10 N. How many newtons more were needed on a carpet than on ice?
39. 39.🪝 A load of 780 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
40. 40.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a tyre with deep treads (c) a grippy rubber sole (d) a smooth steel slide

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