Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 355 · 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 force is at work: rubbing hands warms them? (a) muscular force (b) magnetic force (c) gravity (d) friction
2. 2.True or false: pulling a cart is a push. (a) False (b) True
3. 3.💪 Is pulling up your socks a push or a pull? (a) a pull (b) a push
4. 4.⚖️ A seesaw balances. Zoya (480 N) sits ? m from the pivot on one side; Meena (360 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
5. 5.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) polished marble (d) ice
6. 6.⚙️ Which simple machine is a bottle cap? (a) wedge (b) inclined plane (c) screw (d) pulley
7. 7.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
8. 8.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 1 (c) class 3
9. 9.💪 A cart is pulled to the right with 35 N and to the left with 35 N. Which way does the net force act? (a) to the right (b) no net force (c) to the left
10. 10.⚖️ A lever balances when … (a) the bar is short (b) both weights are equal (c) turning effects match (d) the fulcrum moves
11. 11.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
12. 12.🔍 Which is the odd one out? (a) a wet tiled floor (b) powder on a carrom board (c) a rough doormat (d) skating on ice
13. 13.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
14. 14.🪝 A pulley system lifts a 460 N load with an effort of 230 N. What is its mechanical advantage (MA)?
15. 15.🏋️ Pushing a crate 6 m took 2160 J of work. What force was used, in newtons?
16. 16.⚙️ A wedge is … (a) a rope on a wheel (b) two ramps back to back (c) a bar on a pivot (d) a wheel on a rod
17. 17.⚙️ Which simple machine is a window blind cord? (a) lever (b) pulley (c) screw (d) inclined plane
18. 18.⚖️ A seesaw balances. Arjun (110 N) sits 1 m from the pivot on one side; Ravi (? N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
19. 19.⚙️ How many simple machines are there in the usual list? (a) 3 (b) 12 (c) 10 (d) 6
20. 20.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) muscular force (c) magnetic force (d) friction
21. 21.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
22. 22.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
23. 23.⚖️ A lever bar balances. The load is 140 N at 10 cm from the fulcrum. The effort is 70 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
24. 24.💪 A box weighs 570 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
25. 25.True or false: a movable pulley is on a flagpole top. (a) False (b) True
26. 26.🪝 What does a single fixed pulley change? (a) gravity (b) the direction of pull (c) the colour of rope (d) the size of the load
27. 27.⚙️ A screw is really … (a) a tiny pulley (b) a kind of wheel (c) a ramp wrapped round (d) a bent lever
28. 28.Which of these is a wheel and axle? (a) a chisel (b) a well winch handle (c) a truck loading ramp (d) a crane hook block
29. 29.🔍 Which is the odd one out? (a) a seesaw (b) a crowbar (c) a wheelchair ramp (d) a bottle opener
30. 30.True or false: pushing a swing is a push. (a) False (b) True
31. 31.Which of these is a wedge? (a) a truck loading ramp (b) a flagpole rope wheel (c) a window blind cord (d) a chisel
32. 32.True or false: a tyre with deep treads gives less friction. (a) True (b) False
33. 33.⚖️ Which class of lever is a seesaw? (a) class 2 (b) class 3 (c) class 1
34. 34.🪝 Fixed or movable pulley: which one stays in one place? (a) a fixed pulley (b) a movable pulley
35. 35.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 10 N, sandpaper 13 N, ice 4 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
37. 37.💪 A box weighs 310 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
38. 38.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
39. 39.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
40. 40.⚖️ Which class of lever is a pair of tweezers? (a) class 2 (b) class 3 (c) class 1

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