Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 260 · 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.🪝 More rope sections holding a load means … (a) no change (b) the load floats (c) less effort needed (d) more effort needed
2. 2.💪 Which can a force NOT do? (a) start it moving (b) stop it moving (c) change its shape (d) change its colour
3. 3.⚖️ A seesaw balances. Arjun (240 N) sits ? m from the pivot on one side; Meena (240 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
4. 4.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
5. 5.⚙️ Which simple machine is the tip of a nail? (a) lever (b) wedge (c) inclined plane (d) wheel and axle
6. 6.⚖️ On a seesaw, a heavier child should sit … (a) on the pivot (b) closer to the pivot (c) anywhere (d) farther from the pivot
7. 7.💪 A cart is pulled to the right with 85 N and to the left with 75 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
8. 8.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 20 N at 90 cm from the fulcrum on the other side. What is the missing force in newtons?
9. 9.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
10. 10.⚙️ A wedge is … (a) two ramps back to back (b) a wheel on a rod (c) a bar on a pivot (d) a rope on a wheel
11. 11.True or false: pushing a swing is a push. (a) True (b) False
12. 12.🛞 Friction acts … (a) only upwards (b) against the motion (c) only on ice (d) with the motion
13. 13.🔍 Which is the odd one out? (a) a screw jack (b) a bottle cap (c) a wheelchair ramp (d) a jar lid
14. 14.True or false: a beam balance is a class 2 lever (load in the middle). (a) False (b) True
15. 15.💪 In which unit do we measure force? (a) second (s) (b) metre (m) (c) litre (L) (d) newton (N)
16. 16.Which of these is caused by friction? (a) lifting a school bag (b) brakes stop a bicycle (c) a river flows downhill (d) a magnet picks up pins
17. 17.⚖️ A seesaw balances. Arjun (450 N) sits 4 m from the pivot on one side; Meena (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
18. 18.💪 Which force is at work: squeezing a lemon? (a) friction (b) muscular force (c) gravity (d) magnetic force
19. 19.🪝 What does a single fixed pulley change? (a) the direction of pull (b) gravity (c) the colour of rope (d) the size of the load
20. 20.Which of these is caused by muscular force? (a) a rolling ball slows (b) lifting a school bag (c) a fridge magnet sticks (d) a magnet picks up pins
21. 21.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
22. 22.⚖️ A lever balances when … (a) the bar is short (b) turning effects match (c) both weights are equal (d) the fulcrum moves
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.💪 A box weighs 90 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
25. 25.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 60 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
26. 26.🔍 Which is the odd one out? (a) chalk on a gym bar (b) powder on a carrom board (c) oil on a squeaky hinge (d) skating on ice
27. 27.True or false: a fixed pulley only changes direction. (a) False (b) True
28. 28.True or false: a fixed pulley stays in one place. (a) False (b) True
29. 29.⚖️ A lever bar balances. The load is 300 N at ? cm from the fulcrum. The effort is 150 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
30. 30.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the rock (b) far from the fulcrum (c) on the fulcrum (d) near the fulcrum
31. 31.💪 A force is a … (a) kind of colour (b) push or a pull (c) type of sound (d) unit of time
32. 32.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
33. 33.⚖️ A lever bar balances. The load is 140 N at 20 cm from the fulcrum. The effort is ? N at 20 cm from the fulcrum on the other side. What is the missing force in newtons?
34. 34.True or false: a movable pulley is on a flagpole top. (a) True (b) False
35. 35.⚖️ A seesaw balances. Zoya (600 N) sits 4 m from the pivot on one side; Ravi (600 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
36. 36.💪 Is hitting a cricket ball a push or a pull? (a) a pull (b) a push
37. 37.Which of these is caused by magnetic force? (a) brakes stop a bicycle (b) a compass needle turns (c) rain falls to the ground (d) lifting a school bag
38. 38.⚙️ Which simple machine is a road up a hill? (a) inclined plane (b) pulley (c) screw (d) lever
39. 39.💪 A bag has a mass of 52 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
40. 40.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?

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