Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 972 · 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: hitting a cricket ball is a pull. (a) False (b) True
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 4 N, sandpaper 5 N, a glass sheet 1 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
3. 3.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
4. 4.⚙️ Which simple machine is a flagpole rope wheel? (a) screw (b) inclined plane (c) lever (d) pulley
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, a glass sheet 1 N, a wooden plank 3 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, sandpaper 9 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
7. 7.True or false: a beam balance is a class 1 lever (fulcrum in the middle). (a) False (b) True
8. 8.Which of these is caused by magnetic force? (a) lifting a school bag (b) rain falls to the ground (c) a fridge magnet sticks (d) pedalling a cycle
9. 9.🪝 Fixed or movable pulley: which one only changes direction? (a) a fixed pulley (b) a movable pulley
10. 10.💪 Is pulling up your socks a push or a pull? (a) a push (b) a pull
11. 11.💪 A box weighs 400 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
12. 12.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
13. 13.⚖️ A lever bar balances. The load is 450 N at 40 cm from the fulcrum. The effort is 360 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
15. 15.💪 Which force pulls everything towards the Earth? (a) wind (b) gravity (c) magnetism (d) friction
16. 16.💪 Two children push a box to the right, one with 65 N and the other with 50 N. What is the net (total) force on the box, in newtons?
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 2 (c) class 3
18. 18.🔍 Which is the odd one out? (a) the tip of a nail (b) a chisel (c) an axe blade (d) a window blind cord
19. 19.⚖️ A seesaw balances. Kabir (? N) sits 2 m from the pivot on one side; Zoya (280 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.True or false: a wheelbarrow is a class 1 lever (fulcrum in the middle). (a) False (b) True
21. 21.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.⚖️ Which class of lever is a broom when sweeping? (a) class 1 (b) class 2 (c) class 3
23. 23.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
24. 24.True or false: a lemon squeezer is a class 1 lever (fulcrum in the middle). (a) False (b) True
25. 25.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
26. 26.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
27. 27.⚖️ In a class 3 lever, what is in the middle? (a) the effort (b) the load (c) the pulley (d) the fulcrum
28. 28.⚖️ A seesaw balances. Ravi (600 N) sits 1 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
29. 29.🔍 Which is the odd one out? (a) a rough doormat (b) chalk on a gym bar (c) powder on a carrom board (d) sand on a slippery path
30. 30.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
31. 31.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
32. 32.🔍 Which is the odd one out? (a) powder on a carrom board (b) a grippy rubber sole (c) a wheel on ball bearings (d) skating on ice
33. 33.⚖️ A lever bar balances. The load is 210 N at 20 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
34. 34.Which of these is a wheel and axle? (a) a well winch handle (b) a seesaw (c) the tip of a nail (d) a flagpole rope wheel
35. 35.⚖️ A seesaw balances. Arjun (480 N) sits 3 m from the pivot on one side; Asha (? N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.💪 Which force is at work: a fridge magnet sticks? (a) gravity (b) magnetic force (c) muscular force (d) friction
37. 37.⚖️ A seesaw balances. Ravi (160 N) sits 1 m from the pivot on one side; Meena (160 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
39. 39.⚖️ A seesaw balances. Arjun (300 N) sits ? m from the pivot on one side; Asha (100 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
40. 40.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)

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