Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 827 · 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.Which of these is caused by friction? (a) pedalling a cycle (b) a compass needle turns (c) a river flows downhill (d) brakes stop a bicycle
2. 2.🪝 More rope sections holding a load means … (a) the load floats (b) no change (c) more effort needed (d) less effort needed
3. 3.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) glass (d) polished marble
4. 4.🏋️ A force of 270 N pushes a cart 6 m along the floor. How much work is done, in joules?
5. 5.True or false: a seesaw is a class 2 lever (load in the middle). (a) False (b) True
6. 6.💪 A force is a … (a) kind of colour (b) unit of time (c) type of sound (d) push or a pull
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
8. 8.⚙️ Which simple machine is a playground slide? (a) pulley (b) screw (c) wedge (d) inclined plane
9. 9.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
10. 10.True or false: plucking a mango is a pull. (a) False (b) True
11. 11.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
12. 12.🔍 Which is the odd one out? (a) a road up a hill (b) a crowbar (c) a wheelchair ramp (d) a playground slide
13. 13.🏋️ A force of 430 N did 3870 J of work. How many metres did the object move?
14. 14.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
15. 15.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
16. 16.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 80 N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
17. 17.Which of these is an inclined plane? (a) a round doorknob (b) a flagpole rope wheel (c) a road up a hill (d) a nutcracker
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 12 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
19. 19.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
20. 20.True or false: the tip of a nail is a wedge. (a) True (b) False
21. 21.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the size of the load (d) the colour of rope
22. 22.🪝 A well winch has a handle (wheel) of radius 35 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
23. 23.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 2 (c) class 1
24. 24.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
25. 25.⚖️ What is the pivot point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
26. 26.⚖️ A seesaw balances. Zoya (? N) sits 4 m from the pivot on one side; Ravi (600 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.⚙️ A screw is really … (a) a ramp wrapped round (b) a tiny pulley (c) a kind of wheel (d) a bent lever
28. 28.⚙️ Which simple machine is a bottle opener? (a) wedge (b) lever (c) screw (d) wheel and axle
29. 29.⚖️ Turning effect = force × … (a) time taken (b) distance from fulcrum (c) mass of fulcrum (d) colour of bar
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 10 N, ice 2 N, a glass sheet 6 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
31. 31.Which of these is caused by gravity? (a) a fridge magnet sticks (b) rain falls to the ground (c) lifting a school bag (d) rubbing hands warms them
32. 32.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.🏋️ A force of 240 N pushes a cart 6 m along the floor. How much work is done, in joules?
34. 34.⚖️ A lever bar balances. The load is 140 N at 20 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
35. 35.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
36. 36.⚖️ Which class of lever is a beam balance? (a) class 3 (b) class 2 (c) class 1
37. 37.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
38. 38.True or false: a pair of scissors is a class 1 lever (fulcrum in the middle). (a) True (b) False
39. 39.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 3 (c) class 1
40. 40.True or false: a truck loading ramp is a lever. (a) True (b) False

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