Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 525 · 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.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
2. 2.🔍 Which is the odd one out? (a) a window blind cord (b) a water tap handle (c) a flagpole rope wheel (d) a well-bucket rope wheel
3. 3.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
4. 4.⚙️ Which simple machine is the tip of a nail? (a) pulley (b) wheel and axle (c) wedge (d) inclined plane
5. 5.🔍 Which is the odd one out? (a) a flagpole rope wheel (b) a claw hammer on a nail (c) a seesaw (d) a crowbar
6. 6.⚖️ A seesaw balances. Arjun (260 N) sits ? m from the pivot on one side; Asha (130 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
7. 7.Which of these is a lever? (a) a seesaw (b) a bottle cap (c) a crane hook block (d) a screw jack
8. 8.⚖️ A seesaw balances. Asha (320 N) sits ? m from the pivot on one side; Ravi (320 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
9. 9.⚖️ A seesaw balances. Ravi (440 N) sits 3 m from the pivot on one side; Arjun (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
10. 10.🪝 A well winch has a handle (wheel) of radius 15 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
11. 11.🪝 A winch has a wheel of radius 6 cm and an axle of radius 2 cm. What effort on the wheel lifts a 450 N bucket on the axle, in newtons? (ideal)
12. 12.True or false: a pair of pliers is a class 1 lever (fulcrum in the middle). (a) True (b) False
13. 13.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
14. 14.⚖️ Which class of lever is a nutcracker? (a) class 1 (b) class 2 (c) class 3
15. 15.True or false: a flagpole rope wheel is a pulley. (a) True (b) False
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, sandpaper 9 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
17. 17.🔍 Which is the odd one out? (a) a rough doormat (b) sand on a slippery path (c) a smooth steel slide (d) a tyre with deep treads
18. 18.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?
19. 19.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
20. 20.⚙️ Which simple machine is an axe blade? (a) wheel and axle (b) wedge (c) pulley (d) screw
21. 21.True or false: a door stopper is a wedge. (a) True (b) False
22. 22.💪 Is a tug of war a push or a pull? (a) a pull (b) a push
23. 23.⚖️ A seesaw balances. Kabir (800 N) sits 2 m from the pivot on one side; Asha (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
24. 24.🪝 What does a single fixed pulley change? (a) gravity (b) the colour of rope (c) the direction of pull (d) the size of the load
25. 25.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
26. 26.⚖️ Which class of lever is a fishing rod? (a) class 3 (b) class 1 (c) class 2
27. 27.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
28. 28.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
29. 29.⚙️ Which simple machine is a truck loading ramp? (a) inclined plane (b) lever (c) pulley (d) wedge
30. 30.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
31. 31.🔍 Which is the odd one out? (a) the tip of a nail (b) a jar lid (c) a nut and bolt (d) a screw jack
32. 32.⚙️ Which simple machine is a screw jack? (a) wedge (b) inclined plane (c) screw (d) wheel and axle
33. 33.💪 Which force is at work: a magnet picks up pins? (a) friction (b) gravity (c) muscular force (d) magnetic force
34. 34.⚙️ A wedge is … (a) a rope on a wheel (b) a bar on a pivot (c) a wheel on a rod (d) two ramps back to back
35. 35.💪 In which unit do we measure force? (a) metre (m) (b) litre (L) (c) second (s) (d) newton (N)
36. 36.Which of these is a screw? (a) a wheelchair ramp (b) a nut and bolt (c) a water tap handle (d) a window blind cord
37. 37.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
39. 39.Which of these is a wheel and axle? (a) a bottle opener (b) a nut and bolt (c) a round doorknob (d) a wheelchair ramp
40. 40.💪 A cart is pulled to the right with 90 N and to the left with 90 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right

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