Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 983 · 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 wheel and axle is a big wheel fixed to … (a) a sharp wedge (b) a smaller rod (axle) (c) a loose rope (d) a flat ramp
2. 2.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 3 N, sandpaper 7 N, ice 1 N, a wooden plank 2 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a wooden plank
4. 4.💪 Two children push a box to the right, one with 25 N and the other with 90 N. What is the net (total) force on the box, in newtons?
5. 5.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
6. 6.⚖️ A seesaw balances. Asha (480 N) sits ? m from the pivot on one side; Ravi (160 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
7. 7.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
8. 8.🛞 How can we reduce friction in a machine? (a) make parts rough (b) oil the moving parts (c) press parts harder (d) add sand
9. 9.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 20 N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
11. 11.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) less effort needed (d) the load floats
12. 12.True or false: a tug of war is a pull. (a) True (b) False
13. 13.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
14. 14.💪 A cart is pulled to the right with 40 N and to the left with 55 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
15. 15.⚖️ Which class of lever is a broom when sweeping? (a) class 3 (b) class 1 (c) class 2
16. 16.🔍 Which is the odd one out? (a) a chisel (b) a crane hook block (c) a flagpole rope wheel (d) a well-bucket rope wheel
17. 17.True or false: a movable pulley rises with the load. (a) False (b) True
18. 18.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
19. 19.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 50 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.⚖️ A lever bar balances. The load is 480 N at 30 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?
21. 21.⚙️ Which simple machine is a wheelchair ramp? (a) pulley (b) wedge (c) inclined plane (d) wheel and axle
22. 22.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
23. 23.⚖️ A lever bar balances. The load is 60 N at ? cm from the fulcrum. The effort is 30 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.True or false: a movable pulley stays in one place. (a) False (b) True
25. 25.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) turning effects match (d) the fulcrum moves
26. 26.🪝 A well winch has a handle (wheel) of radius 21 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
27. 27.⚙️ Which simple machine is a truck loading ramp? (a) inclined plane (b) screw (c) wheel and axle (d) pulley
28. 28.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
29. 29.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
30. 30.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
31. 31.🔍 Which is the odd one out? (a) sand on a slippery path (b) chalk on a gym bar (c) a wet tiled floor (d) a grippy rubber sole
32. 32.🪝 A winch has a wheel of radius 4 cm and an axle of radius 1 cm. What effort on the wheel lifts a 640 N bucket on the axle, in newtons? (ideal)
33. 33.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
34. 34.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
35. 35.True or false: skating on ice gives more friction. (a) True (b) False
36. 36.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) ice (d) glass
37. 37.⚙️ Which simple machine is an axe blade? (a) pulley (b) wedge (c) inclined plane (d) screw
38. 38.⚖️ A seesaw balances. Kabir (570 N) sits 1 m from the pivot on one side; Arjun (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 50 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
40. 40.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 0 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2

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