Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 453 · 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 of these is a lever? (a) a door stopper (b) a bottle opener (c) a truck loading ramp (d) a nut and bolt
2. 2.⚖️ A seesaw balances. Arjun (640 N) sits 1 m from the pivot on one side; Asha (160 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
3. 3.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
4. 4.Which of these is caused by gravity? (a) a thrown ball comes down (b) shoes grip the floor (c) a compass needle turns (d) squeezing a lemon
5. 5.True or false: drawing up a well bucket is a push. (a) False (b) True
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 20 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
7. 7.⚖️ Which class of lever is a broom when sweeping? (a) class 2 (b) class 3 (c) class 1
8. 8.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
9. 9.💪 A box weighs 230 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
10. 10.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to go slower (d) to grip the road
11. 11.⚙️ Which simple machine is a nutcracker? (a) inclined plane (b) lever (c) pulley (d) wedge
12. 12.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
13. 13.💪 A cart is pulled to the right with 40 N and to the left with 30 N. Which way does the net force act? (a) no net force (b) to the left (c) to the right
14. 14.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) True (b) False
15. 15.💪 Which force is at work: an apple falls down? (a) magnetic force (b) friction (c) muscular force (d) gravity
16. 16.💪 A box weighs 390 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
17. 17.⚖️ A lever bar balances. The load is 200 N at 10 cm from the fulcrum. The effort is 50 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, ice 1 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
19. 19.⚖️ What is the pivot point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
20. 20.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
21. 21.True or false: a fixed pulley rises with the load. (a) True (b) False
22. 22.🏋️ A force of 70 N did 490 J of work. How many metres did the object move?
23. 23.🔍 Which is the odd one out? (a) a truck loading ramp (b) a wheelchair ramp (c) a playground slide (d) a well winch handle
24. 24.⚖️ Which class of lever is a pair of scissors? (a) class 2 (b) class 1 (c) class 3
25. 25.💪 Is pressing a doorbell a push or a pull? (a) a push (b) a pull
26. 26.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a grippy rubber sole (c) oil on a squeaky hinge (d) sand on a slippery path
27. 27.⚖️ A seesaw balances. Zoya (600 N) sits ? m from the pivot on one side; Asha (800 N) sits 3 m from the pivot on the other side. What is the missing distance in metres?
28. 28.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
29. 29.⚖️ Which class of lever is a fishing rod? (a) class 2 (b) class 1 (c) class 3
30. 30.True or false: a grippy rubber sole gives more friction. (a) True (b) False
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a wooden plank 6 N, sandpaper 10 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
32. 32.💪 A force is a … (a) type of sound (b) kind of colour (c) unit of time (d) push or a pull
33. 33.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
34. 34.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?
35. 35.True or false: a movable pulley only changes direction. (a) True (b) False
36. 36.🪝 A bucket weighing 210 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
37. 37.Which of these is caused by magnetic force? (a) an apple falls down (b) a compass needle turns (c) a thrown ball comes down (d) shoes grip the floor
38. 38.⚖️ Turning effect = force × … (a) colour of bar (b) mass of fulcrum (c) time taken (d) distance from fulcrum
39. 39.⚖️ A lever bar balances. The load is 320 N at 10 cm from the fulcrum. The effort is ? N at 80 cm from the fulcrum on the other side. What is the missing force in newtons?
40. 40.🔍 Which is the odd one out? (a) a crowbar (b) a window blind cord (c) a claw hammer on a nail (d) a bottle opener

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