Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 668 · 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 machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
2. 2.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the colour of rope (c) the size of the load (d) gravity
3. 3.⚖️ A seesaw balances. Arjun (480 N) sits ? m from the pivot on one side; Asha (240 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
4. 4.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) oil on a squeaky hinge (d) powder on a carrom board
5. 5.💪 Which force is at work: squeezing a lemon? (a) gravity (b) friction (c) magnetic force (d) muscular force
6. 6.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
7. 7.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
8. 8.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
9. 9.🔍 Which is the odd one out? (a) a nutcracker (b) a bottle opener (c) a seesaw (d) a flagpole rope wheel
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a wooden plank 8 N, a carpet 12 N. How many newtons more were needed on sandpaper than on ice?
11. 11.True or false: powder on a carrom board gives less friction. (a) False (b) True
12. 12.💪 Which force is at work: a magnet picks up pins? (a) gravity (b) friction (c) magnetic force (d) muscular force
13. 13.True or false: a box pushed on carpet gives less friction. (a) False (b) True
14. 14.🪝 A pulley system lifts a 60 N load with an effort of 30 N. What is its mechanical advantage (MA)?
15. 15.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
16. 16.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
17. 17.💪 Is kicking a football a push or a pull? (a) a push (b) a pull
18. 18.True or false: a wheelbarrow is a class 2 lever (load in the middle). (a) False (b) True
19. 19.⚖️ Going along a lever from one end to the other, the order is: effort, fulcrum, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
20. 20.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a playground slide (c) a truck loading ramp (d) a jar lid
21. 21.⚖️ A seesaw balances. Asha (400 N) sits 4 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?
22. 22.💪 A cart is pulled to the right with 35 N and to the left with 50 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
23. 23.True or false: hitting a cricket ball is a push. (a) False (b) True
24. 24.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) near the fulcrum (b) on the rock (c) far from the fulcrum (d) on the fulcrum
25. 25.True or false: powder on a carrom board gives more friction. (a) True (b) False
26. 26.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
27. 27.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 3 (c) class 1
28. 28.Which of these is caused by friction? (a) squeezing a lemon (b) rain falls to the ground (c) shoes grip the floor (d) a thrown ball comes down
29. 29.🪝 A winch has a wheel of radius 10 cm and an axle of radius 5 cm. What effort on the wheel lifts a 180 N bucket on the axle, in newtons? (ideal)
30. 30.Which of these is an inclined plane? (a) a jar lid (b) a flagpole rope wheel (c) a crane hook block (d) a road up a hill
31. 31.⚖️ Which class of lever is a wheelbarrow? (a) class 1 (b) class 3 (c) class 2
32. 32.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 30 cm and the load at 80 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
33. 33.True or false: closing a drawer is a push. (a) True (b) False
34. 34.⚖️ A seesaw balances. Meena (120 N) sits ? m from the pivot on one side; Arjun (240 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
35. 35.⚖️ Going along a lever from one end to the other, the order is: effort, load, fulcrum. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
36. 36.⚖️ A seesaw balances. Meena (400 N) sits 4 m from the pivot on one side; Arjun (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
37. 37.🛞 Rubbing your hands fast makes them … (a) wet (b) magnetic (c) cold (d) warm
38. 38.True or false: a steering wheel is a lever. (a) True (b) False
39. 39.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
40. 40.🪝 A bucket weighing 460 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)

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