Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 447 · 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.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a loose rope (c) a smaller rod (axle) (d) a flat ramp
2. 2.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
3. 3.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) a tyre with deep treads (d) powder on a carrom board
4. 4.🔍 Which is the odd one out? (a) a steering wheel (b) a water tap handle (c) a well winch handle (d) a bottle cap
5. 5.💪 A bag has a mass of 17 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
6. 6.Which of these is a wheel and axle? (a) a door stopper (b) a jar lid (c) a flagpole rope wheel (d) a steering wheel
7. 7.Which of these is caused by muscular force? (a) a thrown ball comes down (b) a rolling ball slows (c) rain falls to the ground (d) pedalling a cycle
8. 8.🛞 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, sandpaper 12 N, ice 2 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
9. 9.🪝 A bucket weighing 350 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
10. 10.True or false: a smooth steel slide gives more friction. (a) True (b) False
11. 11.True or false: a box pushed on carpet gives less friction. (a) False (b) True
12. 12.True or false: a tyre with deep treads gives less friction. (a) True (b) False
13. 13.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
14. 14.⚙️ Which simple machine is a wood screw? (a) inclined plane (b) screw (c) pulley (d) wheel and axle
15. 15.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
16. 16.True or false: opening a drawer is a pull. (a) True (b) False
17. 17.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
18. 18.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
19. 19.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
20. 20.⚖️ Which class of lever is a bottle opener? (a) class 3 (b) class 1 (c) class 2
21. 21.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) chalk on a gym bar (c) a smooth steel slide (d) a wet tiled floor
22. 22.⚖️ A lever bar balances. The load is 360 N at 10 cm from the fulcrum. The effort is ? N at 60 cm from the fulcrum on the other side. What is the missing force in newtons?
23. 23.🪝 A winch has a wheel of radius 12 cm and an axle of radius 4 cm. What effort on the wheel lifts a 570 N bucket on the axle, in newtons? (ideal)
24. 24.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
25. 25.True or false: a rough doormat gives more friction. (a) False (b) True
26. 26.💪 A force is a … (a) push or a pull (b) unit of time (c) kind of colour (d) type of sound
27. 27.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
28. 28.True or false: chalk on a gym bar gives less friction. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a nut and bolt (b) a wood screw (c) a jar lid (d) a nutcracker
30. 30.Which of these is caused by gravity? (a) pedalling a cycle (b) a compass needle turns (c) rain falls to the ground (d) rubbing hands warms them
31. 31.⚖️ A lever bar balances. The load is 60 N at 10 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.True or false: pulling a cart is a pull. (a) False (b) True
33. 33.True or false: drawing up a well bucket is a push. (a) True (b) False
34. 34.🏋️ 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?
35. 35.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) polished marble (c) ice (d) glass
36. 36.🛞 Friction acts … (a) only upwards (b) with the motion (c) against the motion (d) only on ice
37. 37.True or false: plucking a mango is a pull. (a) False (b) True
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 10 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
39. 39.⚖️ In a class 1 lever, what is in the middle? (a) the load (b) the effort (c) the fulcrum (d) nothing
40. 40.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids