Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 657 · 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.True or false: sand on a slippery path gives less friction. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) a rough doormat (d) chalk on a gym bar
3. 3.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
4. 4.True or false: a fixed pulley stays in one place. (a) True (b) False
5. 5.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the load (d) nothing
6. 6.Which of these is a screw? (a) a road up a hill (b) a well-bucket rope wheel (c) a bottle opener (d) a wood screw
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, sandpaper 7 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
8. 8.⚖️ A lever bar balances. The load is 240 N at 30 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
9. 9.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
10. 10.True or false: pulling a cart is a pull. (a) True (b) False
11. 11.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
12. 12.💪 In which unit do we measure force? (a) litre (L) (b) metre (m) (c) newton (N) (d) second (s)
13. 13.⚖️ A seesaw balances. Meena (? N) sits 4 m from the pivot on one side; Asha (720 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
14. 14.⚖️ Which class of lever is a wheelbarrow? (a) class 3 (b) class 1 (c) class 2
15. 15.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) a wet tiled floor (d) a box pushed on carpet
16. 16.💪 A bag has a mass of 15 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
17. 17.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
18. 18.🔍 Which is the odd one out? (a) a screw jack (b) a nut and bolt (c) a playground slide (d) a wood screw
19. 19.🔍 Which is the odd one out? (a) a water tap handle (b) a flagpole rope wheel (c) a well winch handle (d) a round doorknob
20. 20.True or false: opening a drawer is a pull. (a) False (b) True
21. 21.🏋️ A force of 330 N did 3300 J of work. How many metres did the object move?
22. 22.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 40 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
23. 23.⚖️ A seesaw balances. Asha (300 N) sits 1 m from the pivot on one side; Ravi (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) ice (d) glass
25. 25.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
26. 26.Which of these is an inclined plane? (a) a chisel (b) a steering wheel (c) a truck loading ramp (d) a wood screw
27. 27.⚙️ Which simple machine is an axe blade? (a) lever (b) inclined plane (c) wheel and axle (d) wedge
28. 28.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 7 N, sandpaper 11 N, a glass sheet 1 N. How many newtons more were needed on sandpaper than on a glass sheet?
30. 30.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
31. 31.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 1 (c) class 3
32. 32.🪝 A bucket weighing 140 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
33. 33.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) powder on a carrom board (d) a smooth steel slide
34. 34.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
35. 35.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 10 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
36. 36.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
37. 37.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, a glass sheet 4 N, a wooden plank 7 N, a carpet 10 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
39. 39.⚙️ Which simple machine is a jar lid? (a) pulley (b) inclined plane (c) screw (d) wheel and axle
40. 40.Which of these is caused by gravity? (a) a river flows downhill (b) a compass needle turns (c) pedalling a cycle (d) squeezing a lemon

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