Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 135 · 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 class of lever is a beam balance? (a) class 2 (b) class 3 (c) class 1
2. 2.🔍 Which is the odd one out? (a) a steering wheel (b) a road up a hill (c) a playground slide (d) a wheelchair ramp
3. 3.True or false: a movable pulley needs effort = load. (a) False (b) True
4. 4.⚙️ A wedge is … (a) two ramps back to back (b) a rope on a wheel (c) a bar on a pivot (d) a wheel on a rod
5. 5.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
6. 6.Which of these is a lever? (a) a flagpole rope wheel (b) a nutcracker (c) a wood screw (d) a jar lid
7. 7.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) change its colour (d) stop it moving
8. 8.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
9. 9.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a bent lever (d) a ramp wrapped round
10. 10.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
11. 11.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
12. 12.🪝 A bucket weighing 290 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
13. 13.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
14. 14.True or false: a bottle opener is a screw. (a) True (b) False
15. 15.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 10 cm and the load at 70 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
16. 16.⚖️ A seesaw balances. Asha (240 N) sits ? m from the pivot on one side; Arjun (480 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
17. 17.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
18. 18.⚖️ A seesaw balances. Arjun (760 N) sits 1 m from the pivot on one side; Zoya (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
19. 19.True or false: an axe blade is a wedge. (a) True (b) False
20. 20.True or false: closing a drawer is a push. (a) False (b) True
21. 21.⚖️ A seesaw balances. Asha (320 N) sits 1 m from the pivot on one side; Zoya (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.💪 In a tug of war, one team pulls right with 55 N and the other pulls left with 30 N. What is the size of the net force, in newtons?
23. 23.⚖️ Which class of lever is a pair of tweezers? (a) class 2 (b) class 3 (c) class 1
24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
25. 25.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
26. 26.True or false: a crowbar is a class 2 lever (load in the middle). (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a road up a hill (c) a truck loading ramp (d) a knife edge
28. 28.🏋️ A force of 280 N pushes a cart 4 m along the floor. How much work is done, in joules?
29. 29.True or false: kicking a football is a pull. (a) False (b) True
30. 30.⚙️ Which simple machine is the tip of a nail? (a) screw (b) inclined plane (c) wedge (d) lever
31. 31.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) a smooth steel slide (d) chalk on a gym bar
32. 32.True or false: a bottle opener is a class 1 lever (fulcrum in the middle). (a) False (b) True
33. 33.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
34. 34.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
35. 35.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
36. 36.💪 A box weighs 190 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
38. 38.🏋️ A force of 440 N did 4400 J of work. How many metres did the object move?
39. 39.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
40. 40.💪 A force is a … (a) unit of time (b) push or a pull (c) type of sound (d) kind of colour

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