Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 108 · 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.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
2. 2.💪 A cart is pulled to the right with 35 N and to the left with 25 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
3. 3.💪 Two children push a box to the right, one with 50 N and the other with 5 N. What is the net (total) force on the box, in newtons?
4. 4.True or false: a well-bucket rope wheel is an inclined plane. (a) True (b) False
5. 5.💪 In which unit do we measure force? (a) newton (N) (b) second (s) (c) litre (L) (d) metre (m)
6. 6.⚖️ A seesaw balances. Asha (390 N) sits 1 m from the pivot on one side; Ravi (130 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
7. 7.⚖️ A seesaw balances. Zoya (600 N) sits ? m from the pivot on one side; Ravi (450 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
8. 8.True or false: chalk on a gym bar gives less friction. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) chalk on a gym bar (d) a wet tiled floor
10. 10.⚖️ A seesaw balances. Kabir (300 N) sits 3 m from the pivot on one side; Zoya (450 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
11. 11.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
12. 12.💪 Is drawing up a well bucket a push or a pull? (a) a pull (b) a push
13. 13.⚖️ A lever bar balances. The load is 90 N at ? cm from the fulcrum. The effort is 30 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.🔍 Which is the odd one out? (a) a screw jack (b) a wood screw (c) a seesaw (d) a bottle cap
15. 15.True or false: a chisel is a wedge. (a) False (b) True
16. 16.True or false: a movable pulley halves the effort. (a) False (b) True
17. 17.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
18. 18.🏋️ A force of 270 N did 1080 J of work. How many metres did the object move?
19. 19.True or false: pulling up your socks is a push. (a) True (b) False
20. 20.⚙️ A screw is really … (a) a kind of wheel (b) a tiny pulley (c) a ramp wrapped round (d) a bent lever
21. 21.True or false: a truck loading ramp is an inclined plane. (a) False (b) True
22. 22.🪝 More rope sections holding a load means … (a) more effort needed (b) less effort needed (c) no change (d) the load floats
23. 23.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.True or false: a seesaw is a lever. (a) False (b) True
25. 25.⚙️ Which simple machine is an axe blade? (a) lever (b) pulley (c) screw (d) wedge
26. 26.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
27. 27.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
28. 28.True or false: drawing up a well bucket is a push. (a) False (b) True
29. 29.Which of these is a lever? (a) a nut and bolt (b) a truck loading ramp (c) a claw hammer on a nail (d) a chisel
30. 30.🪝 A pulley system lifts a 600 N load with an effort of 150 N. What is its mechanical advantage (MA)?
31. 31.🔍 Which is the odd one out? (a) a bottle cap (b) a screw jack (c) a nut and bolt (d) a chisel
32. 32.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
33. 33.Which of these is an inclined plane? (a) a nutcracker (b) a crane hook block (c) a jar lid (d) a road up a hill
34. 34.Which of these is a pulley? (a) a flagpole rope wheel (b) the tip of a nail (c) a wheelchair ramp (d) a bottle opener
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, a glass sheet 3 N, a wooden plank 6 N, a carpet 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
36. 36.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
37. 37.⚖️ A seesaw balances. Arjun (220 N) sits 1 m from the pivot on one side; Meena (110 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) the colour of rope (d) gravity
39. 39.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to go slower (c) to look nice (d) to save rubber
40. 40.🛞 How can we reduce friction in a machine? (a) make parts rough (b) add sand (c) oil the moving parts (d) press parts harder

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