Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 303 · 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.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the direction of pull (d) the colour of rope
2. 2.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) True (b) False
3. 3.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
4. 4.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
5. 5.🛞 Why are tyres made with deep treads? (a) to go slower (b) to look nice (c) to save rubber (d) to grip the road
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 50 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
7. 7.🔍 Which is the odd one out? (a) a wet tiled floor (b) chalk on a gym bar (c) powder on a carrom board (d) a smooth steel slide
8. 8.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
9. 9.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 10 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
10. 10.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
11. 11.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
13. 13.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a claw hammer on a nail (c) a bottle opener (d) a crowbar
14. 14.⚖️ Which class of lever is a seesaw? (a) class 1 (b) class 3 (c) class 2
15. 15.🏋️ Pushing a crate 2 m took 680 J of work. What force was used, in newtons?
16. 16.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
17. 17.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
18. 18.True or false: a bottle opener is a class 3 lever (effort in the middle). (a) True (b) False
19. 19.⚙️ Which simple machine is a chisel? (a) wheel and axle (b) pulley (c) screw (d) wedge
20. 20.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
21. 21.⚖️ A seesaw balances. Asha (540 N) sits ? m from the pivot on one side; Kabir (360 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
22. 22.⚙️ A screw is really … (a) a kind of wheel (b) a ramp wrapped round (c) a bent lever (d) a tiny pulley
23. 23.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 12 (d) 6
24. 24.💪 A box weighs 230 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
25. 25.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) gravity (c) muscular force (d) friction
26. 26.🔍 Which is the odd one out? (a) a well winch handle (b) a claw hammer on a nail (c) a nutcracker (d) a seesaw
27. 27.True or false: a fixed pulley only changes direction. (a) True (b) False
28. 28.⚖️ A seesaw balances. Arjun (760 N) sits 4 m from the pivot on one side; Ravi (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
29. 29.🪝 A load of 570 N hangs from a pulley system in which 3 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
30. 30.💪 A force is a … (a) type of sound (b) unit of time (c) kind of colour (d) push or a pull
31. 31.True or false: a nutcracker is a lever. (a) False (b) True
32. 32.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
33. 33.💪 In a tug of war, one team pulls left with 60 N and the other pulls right with 35 N. What is the size of the net force, in newtons?
34. 34.💪 Which force is at work: a river flows downhill? (a) magnetic force (b) friction (c) gravity (d) muscular force
35. 35.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
36. 36.⚖️ A seesaw balances. Meena (450 N) sits ? m from the pivot on one side; Asha (450 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
37. 37.💪 Which force is at work: a magnet picks up pins? (a) friction (b) gravity (c) muscular force (d) magnetic force
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 7 N, a carpet 8 N, ice 2 N. How many newtons more were needed on a carpet than on ice?
39. 39.🔍 Which is the odd one out? (a) a jar lid (b) a screw jack (c) a nut and bolt (d) a wheelchair ramp
40. 40.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort

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