Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 317 · 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.True or false: a grippy rubber sole gives more friction. (a) False (b) True
2. 2.💪 Two children push a box to the right, one with 30 N and the other with 95 N. What is the net (total) force on the box, in newtons?
3. 3.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a rough doormat (c) a wheel on ball bearings (d) powder on a carrom board
4. 4.Which of these is a wheel and axle? (a) a window blind cord (b) a flagpole rope wheel (c) a well winch handle (d) a crowbar
5. 5.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
6. 6.⚖️ A seesaw balances. Asha (240 N) sits 4 m from the pivot on one side; Meena (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
7. 7.🪝 A pulley system lifts a 540 N load with an effort of 270 N. What is its mechanical advantage (MA)?
8. 8.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
9. 9.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
10. 10.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) colour of bar (d) time taken
11. 11.💪 Which can a force NOT do? (a) stop it moving (b) change its colour (c) start it moving (d) change its shape
12. 12.⚖️ What is the pivot point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
13. 13.⚙️ A screw is really … (a) a tiny pulley (b) a ramp wrapped round (c) a kind of wheel (d) a bent lever
14. 14.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
15. 15.⚙️ Which simple machine is a truck loading ramp? (a) wedge (b) inclined plane (c) pulley (d) screw
16. 16.💪 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?
17. 17.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
18. 18.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 100 cm and the load at 30 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
19. 19.⚖️ A lever bar balances. The load is 500 N at 10 cm from the fulcrum. The effort is 100 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
20. 20.True or false: plucking a mango is a push. (a) True (b) False
21. 21.🛞 Friction acts … (a) against the motion (b) only on ice (c) with the motion (d) only upwards
22. 22.True or false: closing a drawer is a pull. (a) True (b) False
23. 23.💪 Which force pulls everything towards the Earth? (a) wind (b) magnetism (c) gravity (d) friction
24. 24.⚖️ A lever bar balances. The load is ? N at 30 cm from the fulcrum. The effort is 210 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
25. 25.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
26. 26.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
27. 27.💪 Which force is at work: lifting a school bag? (a) muscular force (b) gravity (c) friction (d) magnetic force
28. 28.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
29. 29.True or false: a fixed pulley makes you pull 2× rope. (a) True (b) False
30. 30.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to go slower (d) to save rubber
31. 31.💪 A bag has a mass of 54 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
32. 32.True or false: pushing a trolley is a push. (a) True (b) False
33. 33.True or false: a tyre with deep treads gives less friction. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a rough doormat (b) powder on a carrom board (c) a grippy rubber sole (d) a box pushed on carpet
35. 35.⚖️ A seesaw balances. Zoya (130 N) sits 2 m from the pivot on one side; Ravi (260 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
36. 36.🔍 Which is the odd one out? (a) a screw jack (b) a wheelchair ramp (c) a truck loading ramp (d) a playground slide
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 7 N, a carpet 8 N, sandpaper 11 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
38. 38.🪝 What does a single fixed pulley change? (a) the size of the load (b) gravity (c) the colour of rope (d) the direction of pull
39. 39.💪 In a tug of war, one team pulls right with 70 N and the other pulls left with 40 N. What is the size of the net force, in newtons?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 2 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?

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