Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 866 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a wooden plank 5 N, sandpaper 6 N. How many newtons more were needed on sandpaper than on ice?
2. 2.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a smaller rod (axle) (c) a sharp wedge (d) a flat ramp
3. 3.💪 A cart is pulled to the right with 20 N and to the left with 5 N. Which way does the net force act? (a) to the right (b) to the left (c) no net force
4. 4.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
5. 5.True or false: pressing a doorbell is a push. (a) False (b) True
6. 6.⚖️ A seesaw balances. Zoya (400 N) sits ? m from the pivot on one side; Asha (200 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
7. 7.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
8. 8.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 30 cm and the load at 10 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
9. 9.💪 Two equal forces push on a box from opposite sides. They are … (a) unbalanced (b) doubled (c) gravity (d) balanced
10. 10.⚙️ Which simple machine is a well winch handle? (a) inclined plane (b) lever (c) pulley (d) wheel and axle
11. 11.⚖️ Which class of lever is a pair of pliers? (a) class 2 (b) class 1 (c) class 3
12. 12.⚖️ A seesaw balances. Kabir (340 N) sits 1 m from the pivot on one side; Zoya (170 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
13. 13.⚖️ Going along a lever from one end to the other, the order is: load, effort, fulcrum. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
15. 15.Which of these is a pulley? (a) a jar lid (b) a chisel (c) a window blind cord (d) a nutcracker
16. 16.🔍 Which is the odd one out? (a) a wheelchair ramp (b) a playground slide (c) a bottle opener (d) a road up a hill
17. 17.⚖️ 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
18. 18.True or false: a smooth steel slide gives less friction. (a) True (b) False
19. 19.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
20. 20.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 70 cm and the load at 30 cm. Which class of lever is it? (a) class 1 (b) class 2 (c) class 3
21. 21.True or false: a seesaw is a class 3 lever (effort in the middle). (a) True (b) False
22. 22.True or false: a rough doormat gives more friction. (a) False (b) True
23. 23.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
24. 24.Which of these is caused by muscular force? (a) a fridge magnet sticks (b) a magnet picks up pins (c) shoes grip the floor (d) pedalling a cycle
25. 25.⚙️ A wedge is … (a) a bar on a pivot (b) two ramps back to back (c) a rope on a wheel (d) a wheel on a rod
26. 26.True or false: a claw hammer on a nail is an inclined plane. (a) False (b) True
27. 27.🪝 A pulley system lifts an 880 N load with an effort of 220 N. What is its mechanical advantage (MA)?
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 10 N, ice 2 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
29. 29.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
30. 30.🛞 Friction acts … (a) only on ice (b) against the motion (c) only upwards (d) with the motion
31. 31.🔍 Which is the odd one out? (a) a well winch handle (b) a round doorknob (c) a steering wheel (d) a truck loading ramp
32. 32.💪 Which force is at work: pedalling a cycle? (a) gravity (b) magnetic force (c) muscular force (d) friction
33. 33.🔍 Which is the odd one out? (a) a wet tiled floor (b) chalk on a gym bar (c) oil on a squeaky hinge (d) a wheel on ball bearings
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 2 N, a glass sheet 3 N, a carpet 6 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper
35. 35.⚖️ Going along a lever from one end to the other, the order is: fulcrum, load, effort. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
36. 36.True or false: skating on ice gives less friction. (a) True (b) False
37. 37.True or false: a nutcracker is a class 1 lever (fulcrum in the middle). (a) True (b) False
38. 38.True or false: a crane hook block is a wheel and axle. (a) False (b) True
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 7 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
40. 40.🪝 More rope sections holding a load means … (a) more effort needed (b) the load floats (c) no change (d) less effort needed

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