Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 342 · 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.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
2. 2.🪝 A pulley system has 2 rope sections holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
3. 3.⚖️ A seesaw balances. Kabir (200 N) sits 2 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?
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
5. 5.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
6. 6.🔍 Which is the odd one out? (a) a seesaw (b) a nutcracker (c) a well winch handle (d) a crowbar
7. 7.⚖️ A seesaw balances. Ravi (300 N) sits 4 m from the pivot on one side; Asha (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, sandpaper 8 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
9. 9.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
10. 10.Which of these is an inclined plane? (a) a seesaw (b) a road up a hill (c) a crane hook block (d) a nut and bolt
11. 11.🪝 A wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a flat ramp (c) a loose rope (d) a smaller rod (axle)
12. 12.💪 A box weighs 580 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
13. 13.⚖️ A lever bar balances. The load is 30 N at 40 cm from the fulcrum. The effort is ? N at 30 cm from the fulcrum on the other side. What is the missing force in newtons?
14. 14.Which of these is caused by gravity? (a) lifting a school bag (b) an apple falls down (c) pedalling a cycle (d) shoes grip the floor
15. 15.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
16. 16.True or false: a pair of scissors is a class 3 lever (effort in the middle). (a) False (b) True
17. 17.Which of these is a lever? (a) a crane hook block (b) a wheelchair ramp (c) a claw hammer on a nail (d) a window blind cord
18. 18.⚖️ In a class 1 lever, what is in the middle? (a) nothing (b) the fulcrum (c) the effort (d) the load
19. 19.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
20. 20.True or false: a fishing rod is a class 1 lever (fulcrum in the middle). (a) False (b) True
21. 21.⚖️ A seesaw balances. Arjun (680 N) sits 1 m from the pivot on one side; Asha (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
22. 22.🪝 More rope sections holding a load means … (a) less effort needed (b) more effort needed (c) the load floats (d) no change
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, a glass sheet 1 N, a wooden plank 5 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
24. 24.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
25. 25.🪝 A load of 120 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, ice 3 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
27. 27.🔍 Which is the odd one out? (a) a road up a hill (b) a well-bucket rope wheel (c) a window blind cord (d) a flagpole rope wheel
28. 28.💪 A force is a … (a) unit of time (b) kind of colour (c) type of sound (d) push or a pull
29. 29.Which of these is caused by magnetic force? (a) a fridge magnet sticks (b) lifting a school bag (c) shoes grip the floor (d) brakes stop a bicycle
30. 30.Which of these is a lever? (a) a wood screw (b) a well winch handle (c) a road up a hill (d) a crowbar
31. 31.True or false: opening a drawer is a pull. (a) True (b) False
32. 32.🛞 Friction acts … (a) only upwards (b) with the motion (c) only on ice (d) against the motion
33. 33.Which of these is a pulley? (a) a knife edge (b) an axe blade (c) a round doorknob (d) a flagpole rope wheel
34. 34.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
35. 35.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) far from the fulcrum (c) on the rock (d) near the fulcrum
36. 36.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
37. 37.⚙️ A wedge is … (a) a bar on a pivot (b) two ramps back to back (c) a wheel on a rod (d) a rope on a wheel
38. 38.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
39. 39.💪 A box weighs 10 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
40. 40.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?

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