Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 830 · 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) more friction (b) less friction
2. 2.⚖️ A seesaw balances. Arjun (510 N) sits 4 m from the pivot on one side; Zoya (680 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 10 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
4. 4.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a wooden plank 4 N, a carpet 8 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 5 N, a carpet 9 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on ice?
7. 7.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
8. 8.💪 In which unit do we measure force? (a) litre (L) (b) newton (N) (c) second (s) (d) metre (m)
9. 9.🏋️ A force of 60 N did 480 J of work. How many metres did the object move?
10. 10.True or false: a smooth steel slide gives less friction. (a) False (b) True
11. 11.🪝 A pulley system lifts a 140 N load with an effort of 70 N. What is its mechanical advantage (MA)?
12. 12.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
13. 13.⚖️ A lever bar balances. The load is 480 N at 40 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?
14. 14.🛞 Why are tyres made with deep treads? (a) to go slower (b) to grip the road (c) to look nice (d) to save rubber
15. 15.Which of these is caused by gravity? (a) a magnet picks up pins (b) shoes grip the floor (c) rain falls to the ground (d) a fridge magnet sticks
16. 16.🔍 Which is the odd one out? (a) a steering wheel (b) a well-bucket rope wheel (c) a window blind cord (d) a flagpole rope wheel
17. 17.⚖️ 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
18. 18.⚖️ Which class of lever is a pair of scissors? (a) class 1 (b) class 2 (c) class 3
19. 19.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 10 (c) 12 (d) 6
20. 20.🪝 More rope sections holding a load means … (a) less effort needed (b) the load floats (c) more effort needed (d) no change
21. 21.⚙️ A screw is really … (a) a bent lever (b) a tiny pulley (c) a kind of wheel (d) a ramp wrapped round
22. 22.💪 Two children push a box to the right, one with 25 N and the other with 35 N. What is the net (total) force on the box, in newtons?
23. 23.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 70 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
24. 24.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
25. 25.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
26. 26.⚖️ A lever bar balances. The load is 420 N at 10 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?
27. 27.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
28. 28.⚖️ A lever bar balances. The load is 560 N at 40 cm from the fulcrum. The effort is ? N at 70 cm from the fulcrum on the other side. What is the missing force in newtons?
29. 29.💪 Which can a force NOT do? (a) stop it moving (b) change its colour (c) start it moving (d) change its shape
30. 30.🪝 A bucket weighing 240 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
31. 31.True or false: a fixed pulley only changes direction. (a) True (b) False
32. 32.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
33. 33.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) sand on a slippery path (c) a tyre with deep treads (d) chalk on a gym bar
34. 34.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
35. 35.⚙️ Which simple machine is a chisel? (a) screw (b) lever (c) wedge (d) inclined plane
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 4 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
37. 37.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
38. 38.⚙️ Which simple machine is a knife edge? (a) screw (b) pulley (c) wedge (d) lever
39. 39.⚖️ In a class 2 lever, what is in the middle? (a) the load (b) the fulcrum (c) the axle (d) the effort
40. 40.True or false: a fixed pulley is on a flagpole top. (a) False (b) True

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