Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 380 · 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.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
2. 2.🔍 Which is the odd one out? (a) a well winch handle (b) a wood screw (c) a steering wheel (d) a round doorknob
3. 3.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
4. 4.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Arjun (160 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.💪 In a tug of war, one team pulls left with 80 N and the other pulls right with 10 N. What is the size of the net force, in newtons?
6. 6.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
7. 7.🔍 Which is the odd one out? (a) a grippy rubber sole (b) powder on a carrom board (c) a wheel on ball bearings (d) skating on ice
8. 8.True or false: a screw jack is a screw. (a) False (b) True
9. 9.⚖️ Which class of lever is a pair of kitchen tongs? (a) class 2 (b) class 1 (c) class 3
10. 10.🪝 A winch has a wheel of radius 3 cm and an axle of radius 1 cm. What effort on the wheel lifts a 600 N bucket on the axle, in newtons? (ideal)
11. 11.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) switch off gravity (c) use a smaller force (d) make new energy
12. 12.🪝 A winch has a wheel of radius 8 cm and an axle of radius 1 cm. What effort on the wheel lifts an 800 N bucket on the axle, in newtons? (ideal)
13. 13.🪝 A pulley system lifts a 260 N load with an effort of 130 N. What is its mechanical advantage (MA)?
14. 14.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
16. 16.🏋️ A force of 310 N did 1240 J of work. How many metres did the object move?
17. 17.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
18. 18.⚖️ In a class 2 lever, what is in the middle? (a) the effort (b) the load (c) the fulcrum (d) the axle
19. 19.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 2 (c) class 3
20. 20.⚙️ Which simple machine is a jar lid? (a) screw (b) wedge (c) wheel and axle (d) lever
21. 21.Which of these is an inclined plane? (a) a truck loading ramp (b) a door stopper (c) a chisel (d) the tip of a nail
22. 22.🪝 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)
23. 23.True or false: your forearm is a class 3 lever (effort in the middle). (a) True (b) False
24. 24.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 9 m, how many metres of rope must you pull?
25. 25.🛞 Rubbing your hands fast makes them … (a) warm (b) cold (c) wet (d) magnetic
26. 26.🪝 A pulley system lifts a 480 N load with an effort of 240 N. What is its mechanical advantage (MA)?
27. 27.Which of these is caused by gravity? (a) a fridge magnet sticks (b) pedalling a cycle (c) rubbing hands warms them (d) rain falls to the ground
28. 28.🪝 A pulley system lifts a 320 N load with an effort of 80 N. What is its mechanical advantage (MA)?
29. 29.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
30. 30.💪 A cart is pulled to the right with 85 N and to the left with 80 N. Which way does the net force act? (a) to the left (b) to the right (c) no net force
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 80 cm and the load at 50 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
32. 32.True or false: a rough doormat gives more friction. (a) False (b) True
33. 33.⚖️ A seesaw balances. Meena (330 N) sits 4 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 3 N, sandpaper 5 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
35. 35.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Meena (480 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.🛞 How can we reduce friction in a machine? (a) press parts harder (b) oil the moving parts (c) add sand (d) make parts rough
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 9 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) ice
38. 38.True or false: a tug of war is a push. (a) False (b) True
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 80 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
40. 40.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 1 m, how many metres of rope must you pull?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids