Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 703 · 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.True or false: a smooth steel slide gives more friction. (a) False (b) True
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 11 N, sandpaper 12 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
3. 3.🪝 A pulley system lifts a 600 N load with an effort of 150 N. What is its mechanical advantage (MA)?
4. 4.🪝 A bucket weighing 270 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
5. 5.⚖️ A lever balances when … (a) the fulcrum moves (b) the bar is short (c) turning effects match (d) both weights are equal
6. 6.⚖️ A seesaw balances. Asha (? N) sits 1 m from the pivot on one side; Kabir (190 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
7. 7.Which of these is a lever? (a) a crane hook block (b) a seesaw (c) a jar lid (d) the tip of a nail
8. 8.🔍 Which is the odd one out? (a) a bottle cap (b) a wood screw (c) a door stopper (d) a nut and bolt
9. 9.💪 A cart is pulled to the right with 60 N and to the left with 45 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a carpet 10 N, sandpaper 14 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
11. 11.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
12. 12.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
13. 13.True or false: a pair of pliers is a class 2 lever (load in the middle). (a) True (b) False
14. 14.💪 A bag has a mass of 55 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
15. 15.⚖️ A seesaw balances. Meena (190 N) sits ? m from the pivot on one side; Arjun (190 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
16. 16.🪝 A well winch has a handle (wheel) of radius 24 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
17. 17.True or false: opening a drawer is a push. (a) False (b) True
18. 18.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to go slower (d) to look nice
19. 19.Which of these is caused by magnetic force? (a) pedalling a cycle (b) rain falls to the ground (c) a compass needle turns (d) shoes grip the floor
20. 20.⚖️ A seesaw balances. Zoya (? N) sits 1 m from the pivot on one side; Meena (130 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
23. 23.⚙️ A wedge is … (a) a wheel on a rod (b) two ramps back to back (c) a rope on a wheel (d) a bar on a pivot
24. 24.True or false: powder on a carrom board gives more friction. (a) True (b) False
25. 25.True or false: hitting a cricket ball is a push. (a) False (b) True
26. 26.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
27. 27.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the fulcrum (c) the effort (d) the load
28. 28.⚖️ A seesaw balances. Ravi (? N) sits 3 m from the pivot on one side; Arjun (360 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
29. 29.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
30. 30.True or false: a tyre with deep treads gives more friction. (a) True (b) False
31. 31.Which of these is caused by friction? (a) a fridge magnet sticks (b) lifting a school bag (c) shoes grip the floor (d) a magnet picks up pins
32. 32.⚙️ Most simple machines make work easier by letting us … (a) stop all friction (b) make new energy (c) switch off gravity (d) use a smaller force
33. 33.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
34. 34.🪝 A winch has a wheel of radius 12 cm and an axle of radius 4 cm. What effort on the wheel lifts a 600 N bucket on the axle, in newtons? (ideal)
35. 35.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
36. 36.🪝 What does a single fixed pulley change? (a) gravity (b) the colour of rope (c) the size of the load (d) the direction of pull
37. 37.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
38. 38.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
39. 39.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 120 N at 30 cm from the fulcrum on the other side. What is the missing distance in centimetres?
40. 40.⚖️ A seesaw balances. Kabir (130 N) sits ? m from the pivot on one side; Zoya (260 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids