Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 77 · 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 seesaw balances. Kabir (? N) sits 4 m from the pivot on one side; Asha (400 N) sits 1 m from the pivot on the other side. What is the missing weight in newtons?
2. 2.Which of these is a screw? (a) a bottle opener (b) a crane hook block (c) an axe blade (d) a jar lid
3. 3.Which of these is caused by gravity? (a) rubbing hands warms them (b) shoes grip the floor (c) a rolling ball slows (d) an apple falls down
4. 4.Which of these is a pulley? (a) a truck loading ramp (b) a bottle opener (c) a knife edge (d) a window blind cord
5. 5.⚖️ A seesaw balances. Asha (680 N) sits 4 m from the pivot on one side; Ravi (? N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🪝 A pulley system lifts a 340 N load with an effort of 170 N. What is its mechanical advantage (MA)?
7. 7.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
8. 8.⚙️ Which simple machine is a bottle cap? (a) lever (b) screw (c) wedge (d) pulley
9. 9.💪 A cart is pulled to the right with 30 N and to the left with 35 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
10. 10.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
11. 11.⚖️ 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
12. 12.🪝 A pulley system has 3 rope sections holding up the load. To lift the load by 8 m, how many metres of rope must you pull?
13. 13.⚖️ Going along a lever from one end to the other, the order is: load, fulcrum, effort. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
14. 14.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
15. 15.True or false: a bottle cap is a lever. (a) True (b) False
16. 16.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
17. 17.⚙️ Which simple machine is a playground slide? (a) pulley (b) wedge (c) inclined plane (d) lever
18. 18.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
19. 19.🔍 Which is the odd one out? (a) a screw jack (b) a door stopper (c) a nut and bolt (d) a wood screw
20. 20.⚖️ On a seesaw, a heavier child should sit … (a) closer to the pivot (b) farther from the pivot (c) on the pivot (d) anywhere
21. 21.🔍 Which is the odd one out? (a) a knife edge (b) a well-bucket rope wheel (c) a door stopper (d) a chisel
22. 22.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?
23. 23.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
24. 24.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to grip the road (d) to go slower
25. 25.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, sandpaper 9 N, ice 2 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
27. 27.Which of these is an inclined plane? (a) a door stopper (b) a nutcracker (c) a steering wheel (d) a wheelchair ramp
28. 28.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
29. 29.💪 Which force is at work: pedalling a cycle? (a) magnetic force (b) muscular force (c) gravity (d) friction
30. 30.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
31. 31.True or false: a nutcracker is a class 3 lever (effort in the middle). (a) True (b) False
32. 32.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
33. 33.⚙️ A screw is really … (a) a bent lever (b) a ramp wrapped round (c) a tiny pulley (d) a kind of wheel
34. 34.💪 A box weighs 330 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
35. 35.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
36. 36.⚖️ A seesaw balances. Kabir (600 N) sits 3 m from the pivot on one side; Asha (450 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
37. 37.💪 In which unit do we measure force? (a) second (s) (b) newton (N) (c) litre (L) (d) metre (m)
38. 38.⚖️ A lever bar balances. The load is 120 N at ? cm from the fulcrum. The effort is 120 N at 40 cm from the fulcrum on the other side. What is the missing distance in centimetres?
39. 39.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Kabir (570 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
40. 40.⚙️ Which simple machine is a claw hammer on a nail? (a) lever (b) wheel and axle (c) screw (d) wedge

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