Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 828 · 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 is the odd one out? (a) skating on ice (b) a smooth steel slide (c) a wet tiled floor (d) a grippy rubber sole
2. 2.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) less effort needed (d) no change
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 9 N, sandpaper 11 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
4. 4.💪 In which unit do we measure force? (a) litre (L) (b) second (s) (c) newton (N) (d) metre (m)
5. 5.⚖️ A lever bar balances. The load is 180 N at 10 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 40 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
7. 7.Which of these is a wheel and axle? (a) a flagpole rope wheel (b) a round doorknob (c) a door stopper (d) a nut and bolt
8. 8.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
9. 9.🪝 A load of 520 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
10. 10.💪 Is pressing a doorbell a push or a pull? (a) a pull (b) a push
11. 11.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
12. 12.⚙️ Most simple machines make work easier by letting us … (a) use a smaller force (b) stop all friction (c) switch off gravity (d) make new energy
13. 13.💪 A cart is pulled to the right with 50 N and to the left with 35 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
14. 14.True or false: pressing a doorbell is a pull. (a) False (b) True
15. 15.⚙️ Which simple machine is a screw jack? (a) wheel and axle (b) screw (c) lever (d) pulley
16. 16.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
17. 17.⚖️ A seesaw balances. Ravi (360 N) sits 1 m from the pivot on one side; Meena (120 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
18. 18.🔍 Which is the odd one out? (a) a chisel (b) an axe blade (c) a knife edge (d) a flagpole rope wheel
19. 19.🪝 What does a single fixed pulley change? (a) the size of the load (b) the colour of rope (c) gravity (d) the direction of pull
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, ice 1 N, a glass sheet 5 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) a glass sheet (d) a carpet
21. 21.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its colour (d) change its shape
22. 22.🏋️ A force of 280 N pushes a cart 6 m along the floor. How much work is done, in joules?
23. 23.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
24. 24.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
25. 25.🛞 Friction acts … (a) only on ice (b) with the motion (c) only upwards (d) against the motion
26. 26.⚙️ Which simple machine is a playground slide? (a) wedge (b) pulley (c) inclined plane (d) lever
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 12 N, ice 3 N, a wooden plank 7 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
28. 28.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 6 N, a carpet 10 N, sandpaper 12 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
30. 30.⚙️ Which simple machine is a well-bucket rope wheel? (a) inclined plane (b) lever (c) screw (d) pulley
31. 31.⚖️ A seesaw balances. Asha (600 N) sits ? m from the pivot on one side; Meena (150 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 0 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
34. 34.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) friction (c) magnetic force (d) gravity
35. 35.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
36. 36.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
37. 37.🪝 A well winch has a handle (wheel) of radius 6 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
38. 38.💪 A force is a … (a) unit of time (b) type of sound (c) kind of colour (d) push or a pull
39. 39.💪 Is a tug of war a push or a pull? (a) a push (b) a pull
40. 40.True or false: a fixed pulley needs effort = load. (a) False (b) True

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