Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 691 · 40 questions

Engineer's tip (Rough grips, smooth slides): More friction: rough, dry, grippy. Less friction: smooth, oiled, wet, icy, rolling, powdered. Helpful for grip and braking; a problem when it wears or heats parts. Friction test: bigger force needed → more friction.

1. 1.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
2. 2.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
3. 3.🛞 Friction acts … (a) against the motion (b) only upwards (c) only on ice (d) with the motion
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 9 N, sandpaper 12 N, ice 3 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
5. 5.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, ice 2 N, a glass sheet 3 N. How many newtons more were needed on a carpet than on ice?
7. 7.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) chalk on a gym bar (d) skating on ice
8. 8.True or false: a grippy rubber sole gives less friction. (a) True (b) False
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 2 N, a glass sheet 6 N, a carpet 7 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
10. 10.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to save rubber (d) to grip the road
11. 11.True or false: a tyre with deep treads gives more friction. (a) True (b) False
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
13. 13.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) sandpaper (d) glass
14. 14.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
15. 15.True or false: powder on a carrom board gives more friction. (a) False (b) True
16. 16.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
17. 17.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
18. 18.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
19. 19.🛞 Rubbing your hands fast makes them … (a) warm (b) wet (c) magnetic (d) cold
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 7 N, sandpaper 10 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
21. 21.🔍 Which is the odd one out? (a) a rough doormat (b) oil on a squeaky hinge (c) chalk on a gym bar (d) sand on a slippery path
22. 22.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a wooden plank 8 N, a carpet 9 N. How many newtons more were needed on sandpaper than on ice?
24. 24.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wheel on ball bearings (c) a smooth steel slide (d) a grippy rubber sole
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 6 N, a wooden plank 9 N, a carpet 11 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) a wooden plank
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 3 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
27. 27.True or false: a grippy rubber sole gives more friction. (a) False (b) True
28. 28.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 1 N, a wooden plank 3 N, a carpet 7 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
30. 30.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 8 N, ice 1 N. How many newtons more were needed on a carpet than on ice?
32. 32.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) a rough doormat (d) powder on a carrom board
33. 33.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
34. 34.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) a wheel on ball bearings (d) a rough doormat
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a wooden plank 6 N, a carpet 8 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
36. 36.True or false: a box pushed on carpet gives less friction. (a) True (b) False
37. 37.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
38. 38.True or false: sand on a slippery path gives less friction. (a) True (b) False
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 7 N, sandpaper 10 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 7 N, ice 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank

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