Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 302 · 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.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) cold (d) warm
2. 2.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 4 N, sandpaper 5 N, a glass sheet 1 N. How many newtons more were needed on sandpaper than on a glass sheet?
4. 4.⚖️ A seesaw balances. Arjun (? N) sits 1 m from the pivot on one side; Zoya (170 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
5. 5.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a rough doormat (c) skating on ice (d) a wet tiled floor
6. 6.⚙️ Which simple machine is an axe blade? (a) inclined plane (b) pulley (c) screw (d) wedge
7. 7.True or false: powder on a carrom board gives more friction. (a) False (b) True
8. 8.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
9. 9.⚖️ 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
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 6 N, sandpaper 9 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) ice (d) sandpaper
11. 11.🪝 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?
12. 12.🔍 Which is the odd one out? (a) the tip of a nail (b) an axe blade (c) a knife edge (d) a truck loading ramp
13. 13.True or false: a fixed pulley stays in one place. (a) True (b) False
14. 14.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) colour of bar (d) time taken
15. 15.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
16. 16.💪 Which force is at work: lifting a school bag? (a) friction (b) muscular force (c) magnetic force (d) gravity
17. 17.True or false: a broom when sweeping is a class 1 lever (fulcrum in the middle). (a) True (b) False
18. 18.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
19. 19.🪝 More rope sections holding a load means … (a) more effort needed (b) no change (c) less effort needed (d) the load floats
20. 20.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) balanced (c) doubled (d) gravity
21. 21.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
22. 22.💪 A box weighs 190 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
23. 23.🔍 Which is the odd one out? (a) a round doorknob (b) a steering wheel (c) a well winch handle (d) a door stopper
24. 24.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
25. 25.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
26. 26.💪 Which force is at work: shoes grip the floor? (a) gravity (b) friction (c) magnetic force (d) muscular force
27. 27.⚖️ A seesaw balances. Ravi (340 N) sits 3 m from the pivot on one side; Zoya (510 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
28. 28.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
29. 29.True or false: a fixed pulley only changes direction. (a) False (b) True
30. 30.True or false: a fixed pulley hangs on the rope loop. (a) False (b) True
31. 31.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
32. 32.⚖️ What is the pivot point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
33. 33.⚙️ 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
34. 34.True or false: a pair of pliers is a class 3 lever (effort in the middle). (a) True (b) False
35. 35.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
36. 36.Which of these is caused by muscular force? (a) an apple falls down (b) a fridge magnet sticks (c) pedalling a cycle (d) brakes stop a bicycle
37. 37.⚖️ A lever bar balances. The load is 120 N at 20 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, ice 2 N, a wooden plank 3 N. How many newtons more were needed on sandpaper than on ice?
39. 39.⚖️ Which class of lever is a bottle opener? (a) class 2 (b) class 1 (c) class 3
40. 40.🪝 A pulley system lifts a 1080 N load with an effort of 270 N. What is its mechanical advantage (MA)?

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