Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 593 · 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 simple machine is a wheelchair ramp? (a) lever (b) pulley (c) screw (d) inclined plane
2. 2.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
3. 3.⚖️ A lever balances when … (a) the fulcrum moves (b) both weights are equal (c) the bar is short (d) turning effects match
4. 4.⚖️ A seesaw balances. Meena (? N) sits 1 m from the pivot on one side; Arjun (150 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.🪝 A pulley system lifts a 280 N load with an effort of 140 N. What is its mechanical advantage (MA)?
6. 6.💪 A cart is pulled to the right with 80 N and to the left with 90 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 12 N, ice 2 N, a glass sheet 6 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
8. 8.⚖️ On a seesaw, a heavier child should sit … (a) farther from the pivot (b) anywhere (c) on the pivot (d) closer to the pivot
9. 9.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
10. 10.🪝 A well winch has a handle (wheel) of radius 21 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
11. 11.💪 A force is a … (a) push or a pull (b) type of sound (c) kind of colour (d) unit of time
12. 12.⚖️ A seesaw balances. Zoya (520 N) sits ? m from the pivot on one side; Arjun (130 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
13. 13.True or false: a tyre with deep treads gives more friction. (a) False (b) True
14. 14.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
15. 15.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) gravity (d) the colour of rope
16. 16.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
17. 17.💪 Which force is at work: a river flows downhill? (a) muscular force (b) gravity (c) friction (d) magnetic force
18. 18.⚖️ Which class of lever is your forearm? (a) class 3 (b) class 2 (c) class 1
19. 19.⚙️ Which simple machine is the tip of a nail? (a) lever (b) screw (c) wheel and axle (d) wedge
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 100 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
21. 21.💪 Which can a force NOT do? (a) start it moving (b) change its shape (c) stop it moving (d) change its colour
22. 22.⚖️ A seesaw balances. Kabir (200 N) sits 1 m from the pivot on one side; Arjun (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
23. 23.🏋️ Pushing a crate 4 m took 1600 J of work. What force was used, in newtons?
24. 24.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
25. 25.True or false: a rough doormat gives less friction. (a) False (b) True
26. 26.⚖️ A seesaw balances. Kabir (? N) sits 4 m from the pivot on one side; Zoya (400 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 1 N, a glass sheet 2 N, a carpet 5 N. How many newtons more were needed on sandpaper than on ice?
28. 28.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
29. 29.🔍 Which is the odd one out? (a) a playground slide (b) a door stopper (c) an axe blade (d) the tip of a nail
30. 30.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) magnetic force (c) friction (d) muscular force
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
32. 32.💪 Is hitting a cricket ball a push or a pull? (a) a push (b) a pull
33. 33.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) doubled (c) gravity (d) balanced
34. 34.💪 A box weighs 220 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
35. 35.💪 Is closing a drawer a push or a pull? (a) a push (b) a pull
36. 36.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
37. 37.🔍 Which is the odd one out? (a) a well-bucket rope wheel (b) a wood screw (c) a screw jack (d) a jar lid
38. 38.⚙️ Which simple machine is a truck loading ramp? (a) inclined plane (b) pulley (c) lever (d) wedge
39. 39.🪝 A bucket weighing 80 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
40. 40.True or false: closing a drawer is a pull. (a) True (b) False

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