Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 628 · 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 longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
2. 2.True or false: a movable pulley stays in one place. (a) True (b) False
3. 3.⚙️ Which simple machine is a nutcracker? (a) inclined plane (b) lever (c) wedge (d) screw
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, ice 2 N, a glass sheet 5 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
5. 5.True or false: a jar lid is a wedge. (a) True (b) False
6. 6.⚖️ A seesaw balances. Ravi (640 N) sits ? m from the pivot on one side; Zoya (160 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
7. 7.True or false: a movable pulley only changes direction. (a) False (b) True
8. 8.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) on the rock (c) near the fulcrum (d) far from the fulcrum
9. 9.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
10. 10.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
12. 12.True or false: a crowbar is a class 1 lever (fulcrum in the middle). (a) True (b) False
13. 13.⚙️ Most simple machines make work easier by letting us … (a) switch off gravity (b) stop all friction (c) make new energy (d) use a smaller force
14. 14.🔍 Which is the odd one out? (a) skating on ice (b) a tyre with deep treads (c) sand on a slippery path (d) a grippy rubber sole
15. 15.True or false: an axe blade is a pulley. (a) False (b) True
16. 16.True or false: a broom when sweeping is a class 2 lever (load in the middle). (a) False (b) True
17. 17.Which of these is caused by friction? (a) pedalling a cycle (b) a compass needle turns (c) shoes grip the floor (d) lifting a school bag
18. 18.True or false: a smooth steel slide gives less friction. (a) False (b) True
19. 19.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 10 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a carpet 3 N, sandpaper 5 N, ice 1 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
21. 21.⚖️ Along a straight bar, measured from the left end, the effort is at 60 cm, the fulcrum at 30 cm and the load at 90 cm. Which class of lever is it? (a) class 2 (b) class 3 (c) class 1
22. 22.🔍 Which is the odd one out? (a) a water tap handle (b) a window blind cord (c) a flagpole rope wheel (d) a well-bucket rope wheel
23. 23.Which of these is a lever? (a) a crane hook block (b) a crowbar (c) a chisel (d) a nut and bolt
24. 24.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a loose rope (d) a smaller rod (axle)
25. 25.⚙️ How many simple machines are there in the usual list? (a) 10 (b) 3 (c) 12 (d) 6
26. 26.🔍 Which is the odd one out? (a) a wood screw (b) a seesaw (c) a nut and bolt (d) a screw jack
27. 27.💪 Which can a force NOT do? (a) stop it moving (b) start it moving (c) change its colour (d) change its shape
28. 28.True or false: a playground slide is a pulley. (a) False (b) True
29. 29.Which of these is caused by magnetic force? (a) brakes stop a bicycle (b) a rolling ball slows (c) a compass needle turns (d) an apple falls down
30. 30.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a movable pulley (b) a fixed pulley
31. 31.💪 Which force is at work: a rolling ball slows? (a) magnetic force (b) muscular force (c) friction (d) gravity
32. 32.💪 Is opening a drawer a push or a pull? (a) a pull (b) a push
33. 33.💪 A bag has a mass of 8 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
34. 34.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
35. 35.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
36. 36.🪝 A pulley system lifts a 1200 N load with an effort of 300 N. What is its mechanical advantage (MA)?
37. 37.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 10 N, sandpaper 11 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N, sandpaper 12 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
40. 40.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?

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