Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 611 · 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.True or false: the tip of a nail is a screw. (a) False (b) True
2. 2.True or false: powder on a carrom board gives less friction. (a) False (b) True
3. 3.⚙️ A wedge is … (a) a rope on a wheel (b) two ramps back to back (c) a bar on a pivot (d) a wheel on a rod
4. 4.Which of these is a screw? (a) a steering wheel (b) a claw hammer on a nail (c) a wood screw (d) a playground slide
5. 5.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
6. 6.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 3 (c) class 1
7. 7.⚖️ Along a straight bar, measured from the left end, the effort is at 0 cm, the fulcrum at 20 cm and the load at 40 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
8. 8.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
9. 9.💪 Two children push a box to the right, one with 80 N and the other with 45 N. What is the net (total) force on the box, in newtons?
10. 10.🏋️ A force of 410 N pushes a cart 6 m along the floor. How much work is done, in joules?
11. 11.⚙️ A screw is really … (a) a kind of wheel (b) a tiny pulley (c) a bent lever (d) a ramp wrapped round
12. 12.Which of these is a pulley? (a) a nut and bolt (b) a chisel (c) a crane hook block (d) a door stopper
13. 13.🪝 A pulley system lifts a 240 N load with an effort of 60 N. What is its mechanical advantage (MA)?
14. 14.💪 A cart is pulled to the right with 55 N and to the left with 45 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
15. 15.Which of these is caused by gravity? (a) lifting a school bag (b) brakes stop a bicycle (c) a magnet picks up pins (d) rain falls to the ground
16. 16.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) glass (d) sandpaper
17. 17.⚙️ Which simple machine is a truck loading ramp? (a) lever (b) inclined plane (c) screw (d) wedge
18. 18.🪝 A well winch has a handle (wheel) of radius 32 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
19. 19.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 40 N at 100 cm from the fulcrum on the other side. What is the missing force in newtons?
20. 20.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 8 N, sandpaper 9 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
22. 22.🛞 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 8 N, a glass sheet 1 N. How many newtons more were needed on sandpaper than on a glass sheet?
23. 23.💪 In which unit do we measure force? (a) second (s) (b) metre (m) (c) litre (L) (d) newton (N)
24. 24.True or false: a bottle opener is a class 3 lever (effort in the middle). (a) True (b) False
25. 25.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
26. 26.💪 A cart is pulled to the right with 35 N and to the left with 30 N. Which way does the net force act? (a) to the left (b) no net force (c) to the right
27. 27.🪝 A pulley system lifts an 870 N load with an effort of 290 N. What is its mechanical advantage (MA)?
28. 28.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
29. 29.True or false: a tug of war is a push. (a) True (b) False
30. 30.🪝 A winch has a wheel of radius 7 cm and an axle of radius 1 cm. What effort on the wheel lifts a 1050 N bucket on the axle, in newtons? (ideal)
31. 31.⚖️ Along a straight bar, measured from the left end, the effort is at 110 cm, the fulcrum at 30 cm and the load at 70 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
32. 32.🔍 Which is the odd one out? (a) a well winch handle (b) a round doorknob (c) a steering wheel (d) a wood screw
33. 33.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
34. 34.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
35. 35.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
36. 36.🏋️ A force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?
37. 37.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
38. 38.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
39. 39.💪 In a tug of war, one team pulls left with 10 N and the other pulls right with 5 N. What is the size of the net force, in newtons?
40. 40.💪 Is pushing a trolley a push or a pull? (a) a push (b) a pull

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