Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 262 · 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 grippy rubber sole? (a) less friction (b) more friction
2. 2.💪 Which force is at work: shoes grip the floor? (a) friction (b) magnetic force (c) muscular force (d) gravity
3. 3.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 2 (c) class 3
4. 4.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
5. 5.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a bent lever (d) a ramp wrapped round
6. 6.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
7. 7.🛞 Friction acts … (a) only on ice (b) only upwards (c) with the motion (d) against the motion
8. 8.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
9. 9.💪 A box weighs 20 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
10. 10.True or false: a movable pulley makes you pull 2× rope. (a) False (b) True
11. 11.⚖️ A seesaw balances. Kabir (450 N) sits ? m from the pivot on one side; Zoya (300 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
12. 12.True or false: skating on ice gives less friction. (a) False (b) True
13. 13.⚖️ A lever bar balances. The load is 200 N at 10 cm from the fulcrum. The effort is 20 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.🪝 What does a single fixed pulley change? (a) the colour of rope (b) the size of the load (c) gravity (d) the direction of pull
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, ice 1 N, a glass sheet 2 N. How many newtons more were needed on sandpaper than on ice?
16. 16.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
17. 17.Which of these is an inclined plane? (a) a knife edge (b) a crowbar (c) a truck loading ramp (d) a well-bucket rope wheel
18. 18.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
19. 19.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 50 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.Which of these is a lever? (a) a crowbar (b) the tip of a nail (c) a door stopper (d) a truck loading ramp
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 20 cm and the load at 0 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
22. 22.Which of these is caused by muscular force? (a) a rolling ball slows (b) pedalling a cycle (c) shoes grip the floor (d) rain falls to the ground
23. 23.Which of these is a wedge? (a) a water tap handle (b) a screw jack (c) a truck loading ramp (d) a chisel
24. 24.🪝 A winch has a wheel of radius 6 cm and an axle of radius 2 cm. What effort on the wheel lifts a 600 N bucket on the axle, in newtons? (ideal)
25. 25.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
26. 26.True or false: an axe blade is a pulley. (a) True (b) False
27. 27.⚖️ In a class 2 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the axle
28. 28.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
29. 29.⚖️ A lever bar balances. The load is 100 N at ? cm from the fulcrum. The effort is 250 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.⚖️ A seesaw balances. Zoya (220 N) sits ? m from the pivot on one side; Kabir (440 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
31. 31.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
32. 32.⚖️ A seesaw balances. Kabir (190 N) sits 2 m from the pivot on one side; Zoya (380 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 40 cm and the load at 60 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
34. 34.💪 Two children push a box to the right, one with 10 N and the other with 5 N. What is the net (total) force on the box, in newtons?
35. 35.⚖️ A lever bar balances. The load is 400 N at 50 cm from the fulcrum. The effort is 400 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
36. 36.⚙️ A wedge is … (a) a bar on a pivot (b) a wheel on a rod (c) a rope on a wheel (d) two ramps back to back
37. 37.💪 Two equal forces push on a box from opposite sides. They are … (a) balanced (b) doubled (c) gravity (d) unbalanced
38. 38.🏋️ A force of 200 N pushes a cart 8 m along the floor. How much work is done, in joules?
39. 39.True or false: a road up a hill is a lever. (a) False (b) True
40. 40.Which of these is a pulley? (a) a round doorknob (b) a flagpole rope wheel (c) a claw hammer on a nail (d) a playground slide

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