Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 112 · 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 screw is really … (a) a bent lever (b) a ramp wrapped round (c) a tiny pulley (d) a kind of wheel
2. 2.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) the colour of rope (d) gravity
3. 3.🪝 A pulley system lifts a 360 N load with an effort of 180 N. What is its mechanical advantage (MA)?
4. 4.⚖️ A lever balances when … (a) turning effects match (b) both weights are equal (c) the bar is short (d) the fulcrum moves
5. 5.💪 Which force is at work: a compass needle turns? (a) magnetic force (b) muscular force (c) gravity (d) friction
6. 6.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
7. 7.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
8. 8.⚙️ Which simple machine is a well-bucket rope wheel? (a) wedge (b) pulley (c) wheel and axle (d) lever
9. 9.💪 A force is a … (a) kind of colour (b) type of sound (c) unit of time (d) push or a pull
10. 10.💪 A box weighs 550 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
11. 11.💪 In which unit do we measure force? (a) second (s) (b) litre (L) (c) metre (m) (d) newton (N)
12. 12.⚖️ A seesaw balances. Arjun (? N) sits 4 m from the pivot on one side; Asha (480 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
13. 13.💪 Two children push a box to the right, one with 20 N and the other with 60 N. What is the net (total) force on the box, in newtons?
14. 14.⚖️ A lever bar balances. The load is 20 N at ? cm from the fulcrum. The effort is 50 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
15. 15.⚖️ A seesaw balances. Arjun (200 N) sits ? m from the pivot on one side; Meena (400 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
16. 16.💪 Which force pulls everything towards the Earth? (a) magnetism (b) friction (c) wind (d) gravity
17. 17.🔍 Which is the odd one out? (a) a bottle opener (b) a nutcracker (c) a flagpole rope wheel (d) a crowbar
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 10 N, a carpet 13 N. How many newtons more were needed on a carpet than on ice?
19. 19.⚖️ A seesaw balances. Kabir (320 N) sits 1 m from the pivot on one side; Zoya (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
20. 20.🪝 A well winch has a handle (wheel) of radius 2 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?
21. 21.🏋️ A force of 310 N did 1550 J of work. How many metres did the object move?
22. 22.⚖️ What is the pivot point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
23. 23.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
24. 24.⚙️ Which simple machine is a flagpole rope wheel? (a) wheel and axle (b) lever (c) screw (d) pulley
25. 25.⚖️ A lever bar balances. The load is 60 N at ? cm from the fulcrum. The effort is 10 N at 60 cm from the fulcrum on the other side. What is the missing distance in centimetres?
26. 26.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
27. 27.Which of these is a wheel and axle? (a) a flagpole rope wheel (b) a window blind cord (c) a bottle cap (d) a steering wheel
28. 28.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
29. 29.💪 In a tug of war, one team pulls right with 85 N and the other pulls left with 75 N. What is the size of the net force, in newtons?
30. 30.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Meena (320 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
31. 31.⚖️ A lever bar balances. The load is 320 N at 30 cm from the fulcrum. The effort is 120 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
32. 32.🛞 Friction acts … (a) only on ice (b) with the motion (c) against the motion (d) only upwards
33. 33.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
34. 34.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 3 (c) class 2
35. 35.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
36. 36.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
37. 37.⚖️ A seesaw balances. Zoya (150 N) sits 2 m from the pivot on one side; Ravi (300 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
38. 38.⚙️ Which simple machine is a nutcracker? (a) pulley (b) wedge (c) lever (d) screw
39. 39.True or false: kicking a football is a push. (a) False (b) True
40. 40.⚖️ Which class of lever is a seesaw? (a) class 3 (b) class 2 (c) class 1

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