Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 792 · 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. Asha (150 N) sits 1 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
2. 2.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
3. 3.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
4. 4.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) add sand (d) oil the moving parts
5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
7. 7.True or false: skating on ice gives less friction. (a) True (b) False
8. 8.🛞 Why are tyres made with deep treads? (a) to go slower (b) to look nice (c) to grip the road (d) to save rubber
9. 9.⚖️ On a seesaw, a heavier child should sit … (a) anywhere (b) farther from the pivot (c) closer to the pivot (d) on the pivot
10. 10.Which of these is an inclined plane? (a) a steering wheel (b) a flagpole rope wheel (c) a bottle cap (d) a wheelchair ramp
11. 11.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
12. 12.True or false: drawing up a well bucket is a pull. (a) False (b) True
13. 13.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
14. 14.⚙️ Which simple machine is a truck loading ramp? (a) pulley (b) wheel and axle (c) wedge (d) inclined plane
15. 15.🔍 Which is the odd one out? (a) a wet tiled floor (b) a rough doormat (c) a smooth steel slide (d) skating on ice
16. 16.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
17. 17.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
18. 18.True or false: a seesaw is a class 1 lever (fulcrum in the middle). (a) True (b) False
19. 19.⚙️ Which simple machine is a bottle cap? (a) inclined plane (b) screw (c) wheel and axle (d) wedge
20. 20.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 300 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
21. 21.🔍 Which is the odd one out? (a) a truck loading ramp (b) a well winch handle (c) a water tap handle (d) a steering wheel
22. 22.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
23. 23.⚖️ A seesaw balances. Zoya (150 N) sits 2 m from the pivot on one side; Arjun (300 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 4 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
25. 25.🏋️ A force of 410 N did 2050 J of work. How many metres did the object move?
26. 26.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Ravi (240 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
27. 27.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
28. 28.Which of these is caused by magnetic force? (a) a river flows downhill (b) shoes grip the floor (c) rubbing hands warms them (d) a magnet picks up pins
29. 29.🪝 A pulley system lifts a 520 N load with an effort of 260 N. What is its mechanical advantage (MA)?
30. 30.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
31. 31.🪝 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?
32. 32.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 9 N, sandpaper 13 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
34. 34.🛞 Friction acts … (a) with the motion (b) against the motion (c) only on ice (d) only upwards
35. 35.💪 Two children push a box to the right, one with 95 N and the other with 85 N. What is the net (total) force on the box, in newtons?
36. 36.🏋️ A force of 400 N pushes a cart 8 m along the floor. How much work is done, in joules?
37. 37.True or false: a movable pulley hangs on the rope loop. (a) True (b) False
38. 38.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
39. 39.🪝 Fixed or movable pulley: which one hangs on the rope loop? (a) a fixed pulley (b) a movable pulley
40. 40.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 7 m, how many metres of rope must you pull?

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