Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 52 · 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) a truck loading ramp (b) a wheelchair ramp (c) a screw jack (d) a road up a hill
2. 2.⚖️ A lever bar balances. The load is ? N at 50 cm from the fulcrum. The effort is 400 N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
3. 3.🪝 A winch has a wheel of radius 7 cm and an axle of radius 1 cm. What effort on the wheel lifts a 910 N bucket on the axle, in newtons? (ideal)
4. 4.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
5. 5.Which of these is caused by gravity? (a) brakes stop a bicycle (b) rubbing hands warms them (c) rain falls to the ground (d) a rolling ball slows
6. 6.⚙️ A wedge is … (a) two ramps back to back (b) a bar on a pivot (c) a wheel on a rod (d) a rope on a wheel
7. 7.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 10 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
9. 9.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) distance from fulcrum (d) time taken
10. 10.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 2 (c) class 1
11. 11.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
12. 12.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) a compass needle turns (c) pedalling a cycle (d) a rolling ball slows
13. 13.⚖️ A lever balances when … (a) both weights are equal (b) turning effects match (c) the fulcrum moves (d) the bar is short
14. 14.True or false: a fixed pulley is on a flagpole top. (a) False (b) True
15. 15.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the axle (c) the fulcrum (d) the effort
16. 16.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
17. 17.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 60 cm and the load at 30 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 12 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
19. 19.⚖️ A lever bar balances. The load is 420 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?
20. 20.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
21. 21.🏋️ A force of 450 N did 450 J of work. How many metres did the object move?
22. 22.⚖️ In a class 3 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the load (d) the pulley
23. 23.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
24. 24.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
25. 25.⚖️ A seesaw balances. Kabir (330 N) sits 2 m from the pivot on one side; Ravi (220 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
26. 26.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
27. 27.⚙️ A screw is really … (a) a ramp wrapped round (b) a tiny pulley (c) a bent lever (d) a kind of wheel
28. 28.⚖️ A lever bar balances. The load is 280 N at 50 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
29. 29.Which of these is a lever? (a) a water tap handle (b) a nutcracker (c) a flagpole rope wheel (d) a nut and bolt
30. 30.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
31. 31.Which of these is caused by magnetic force? (a) rain falls to the ground (b) a fridge magnet sticks (c) brakes stop a bicycle (d) rubbing hands warms them
32. 32.True or false: pressing a doorbell is a pull. (a) True (b) False
33. 33.🪝 A winch has a wheel of radius 9 cm and an axle of radius 3 cm. What effort on the wheel lifts a 330 N bucket on the axle, in newtons? (ideal)
34. 34.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
35. 35.💪 A box weighs 360 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
36. 36.🪝 A pulley system lifts a 460 N load with an effort of 230 N. What is its mechanical advantage (MA)?
37. 37.True or false: a tyre with deep treads gives more friction. (a) True (b) False
38. 38.🪝 A load of 330 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
39. 39.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a grippy rubber sole (c) a smooth steel slide (d) oil on a squeaky hinge
40. 40.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

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