Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 659 · 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 seesaw balances. Zoya (? N) sits 2 m from the pivot on one side; Meena (200 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
2. 2.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the axle (c) the effort (d) the fulcrum
3. 3.True or false: a tug of war is a push. (a) True (b) False
4. 4.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
5. 5.🛞 Friction acts … (a) against the motion (b) with the motion (c) only on ice (d) only upwards
6. 6.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) on the fulcrum (d) far from the fulcrum
7. 7.True or false: a crowbar is a lever. (a) False (b) True
8. 8.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
9. 9.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
10. 10.🔍 Which is the odd one out? (a) a crane hook block (b) a chisel (c) a door stopper (d) a knife edge
11. 11.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
12. 12.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a sharp wedge (c) a flat ramp (d) a loose rope
13. 13.Which of these is a pulley? (a) a screw jack (b) a well-bucket rope wheel (c) a nutcracker (d) a seesaw
14. 14.⚖️ A lever bar balances. The load is 480 N at 40 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?
15. 15.⚙️ A wedge is … (a) a rope on a wheel (b) two ramps back to back (c) a wheel on a rod (d) a bar on a pivot
16. 16.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
17. 17.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
18. 18.⚖️ A seesaw balances. Meena (220 N) sits 2 m from the pivot on one side; Kabir (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.⚖️ A seesaw balances. Kabir (600 N) sits 1 m from the pivot on one side; Arjun (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
21. 21.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
22. 22.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) ice (d) polished marble
23. 23.True or false: a crane hook block is a pulley. (a) False (b) True
24. 24.⚖️ A lever balances when … (a) both weights are equal (b) the bar is short (c) the fulcrum moves (d) turning effects match
25. 25.💪 A cart is pulled to the right with 75 N and to the left with 65 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
26. 26.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
27. 27.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
28. 28.🪝 What does a single fixed pulley change? (a) gravity (b) the colour of rope (c) the direction of pull (d) the size of the load
29. 29.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
30. 30.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) a thrown ball comes down (c) rain falls to the ground (d) squeezing a lemon
31. 31.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
32. 32.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
33. 33.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
34. 34.💪 A cart is pulled to the right with 45 N and to the left with 35 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
35. 35.🪝 A load of 480 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
36. 36.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
37. 37.🪝 A load of 510 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
38. 38.⚖️ Which class of lever is a pair of tweezers? (a) class 3 (b) class 1 (c) class 2
39. 39.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Ravi (240 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?

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