Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 334 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 6 N, sandpaper 8 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
2. 2.⚖️ A seesaw balances. Zoya (200 N) sits 2 m from the pivot on one side; Kabir (400 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
3. 3.⚙️ A wedge is … (a) a bar on a pivot (b) a rope on a wheel (c) two ramps back to back (d) a wheel on a rod
4. 4.True or false: a jar lid is a screw. (a) False (b) True
5. 5.💪 A bag has a mass of 25 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 2 N, a glass sheet 5 N, a wooden plank 7 N. How many newtons more were needed on a carpet than on ice?
7. 7.True or false: a tyre with deep treads gives more friction. (a) True (b) False
8. 8.🏋️ A force of 460 N did 460 J of work. How many metres did the object move?
9. 9.💪 A box weighs 80 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
10. 10.💪 In which unit do we measure force? (a) metre (m) (b) second (s) (c) newton (N) (d) litre (L)
11. 11.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
12. 12.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
13. 13.Which of these is a wedge? (a) an axe blade (b) a bottle cap (c) a window blind cord (d) a wheelchair ramp
14. 14.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
15. 15.💪 A cart is pulled to the right with 90 N and to the left with 105 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
16. 16.True or false: a claw hammer on a nail is a pulley. (a) False (b) True
17. 17.⚙️ How many simple machines are there in the usual list? (a) 12 (b) 3 (c) 10 (d) 6
18. 18.⚖️ Turning effect = force × … (a) mass of fulcrum (b) distance from fulcrum (c) time taken (d) colour of bar
19. 19.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
20. 20.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
21. 21.⚖️ A seesaw balances. Meena (130 N) sits ? m from the pivot on one side; Ravi (260 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
22. 22.🔍 Which is the odd one out? (a) a claw hammer on a nail (b) a flagpole rope wheel (c) a seesaw (d) a nutcracker
23. 23.⚖️ A seesaw balances. Kabir (360 N) sits 1 m from the pivot on one side; Arjun (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.💪 Two children push a box to the right, one with 65 N and the other with 5 N. What is the net (total) force on the box, in newtons?
25. 25.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
26. 26.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
27. 27.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
28. 28.⚖️ A seesaw balances. Ravi (? N) sits 1 m from the pivot on one side; Zoya (170 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
29. 29.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
30. 30.Which of these is a screw? (a) a well-bucket rope wheel (b) a window blind cord (c) a knife edge (d) a jar lid
31. 31.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) anywhere (c) farther from the pivot (d) closer to the pivot
32. 32.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
33. 33.⚖️ Which class of lever is a pair of pliers? (a) class 3 (b) class 1 (c) class 2
34. 34.⚖️ In a class 3 lever, what is in the middle? (a) the fulcrum (b) the load (c) the effort (d) the pulley
35. 35.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Kabir (280 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
36. 36.⚙️ Which simple machine is a claw hammer on a nail? (a) inclined plane (b) pulley (c) lever (d) screw
37. 37.True or false: a crowbar is a lever. (a) True (b) False
38. 38.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
39. 39.⚖️ Along a straight bar, measured from the left end, the effort is at 70 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
40. 40.True or false: drawing up a well bucket is a pull. (a) False (b) True

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