Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 8 · 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 smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
2. 2.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
3. 3.🔍 Which is the odd one out? (a) a grippy rubber sole (b) oil on a squeaky hinge (c) chalk on a gym bar (d) sand on a slippery path
4. 4.True or false: a box pushed on carpet gives less friction. (a) False (b) True
5. 5.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
6. 6.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 1 m, how many metres of rope must you pull?
7. 7.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the load (d) the axle
8. 8.🪝 A well winch has a handle (wheel) of radius 35 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
9. 9.🪝 A pulley system lifts a 120 N load with an effort of 40 N. What is its mechanical advantage (MA)?
10. 10.🏋️ A force of 490 N did 3920 J of work. How many metres did the object move?
11. 11.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
12. 12.🔍 Which is the odd one out? (a) a nutcracker (b) a seesaw (c) a water tap handle (d) a bottle opener
13. 13.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
14. 14.True or false: plucking a mango is a pull. (a) True (b) False
15. 15.💪 Which can a force NOT do? (a) stop it moving (b) change its colour (c) start it moving (d) change its shape
16. 16.💪 Which force pulls everything towards the Earth? (a) wind (b) gravity (c) magnetism (d) friction
17. 17.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
18. 18.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🔍 Which is the odd one out? (a) a wood screw (b) a jar lid (c) a nutcracker (d) a nut and bolt
20. 20.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
21. 21.⚖️ A lever bar balances. The load is 160 N at 30 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
22. 22.True or false: a fishing rod is a class 3 lever (effort in the middle). (a) False (b) True
23. 23.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the effort (c) the fulcrum (d) the load
24. 24.⚙️ Which simple machine is a bottle opener? (a) screw (b) lever (c) pulley (d) inclined plane
25. 25.Which of these is a pulley? (a) a bottle opener (b) a claw hammer on a nail (c) a round doorknob (d) a flagpole rope wheel
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, sandpaper 11 N, a glass sheet 2 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
27. 27.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
28. 28.True or false: powder on a carrom board gives less friction. (a) False (b) True
29. 29.⚖️ A seesaw balances. Arjun (200 N) sits 1 m from the pivot on one side; Zoya (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
30. 30.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
31. 31.💪 Is drawing up a well bucket a push or a pull? (a) a push (b) a pull
32. 32.Which of these is a screw? (a) a nut and bolt (b) a truck loading ramp (c) a flagpole rope wheel (d) the tip of a nail
33. 33.⚖️ A seesaw balances. Zoya (390 N) sits 2 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
34. 34.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
35. 35.True or false: pushing a swing is a pull. (a) False (b) True
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 1 N, a wooden plank 2 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) ice (d) a carpet
37. 37.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
39. 39.🪝 A load of 920 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
40. 40.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the fulcrum moves (d) the bar is short

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