Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 497 · 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.Which of these is a wheel and axle? (a) a water tap handle (b) the tip of a nail (c) a crane hook block (d) a crowbar
2. 2.True or false: pulling a cart is a push. (a) True (b) False
3. 3.Which of these is caused by friction? (a) a magnet picks up pins (b) squeezing a lemon (c) an apple falls down (d) brakes stop a bicycle
4. 4.True or false: a rough doormat gives more friction. (a) False (b) True
5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
6. 6.⚙️ Which simple machine is a playground slide? (a) pulley (b) screw (c) inclined plane (d) wedge
7. 7.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
8. 8.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 3 (c) class 1
9. 9.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) more effort needed (d) the load floats
10. 10.True or false: a grippy rubber sole gives less friction. (a) False (b) True
11. 11.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
12. 12.⚙️ Which simple machine is a door stopper? (a) inclined plane (b) wedge (c) screw (d) wheel and axle
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 2 N, a carpet 5 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a glass sheet
14. 14.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to go slower (c) to save rubber (d) to look nice
15. 15.True or false: a tug of war is a push. (a) True (b) False
16. 16.⚙️ Which simple machine is a steering wheel? (a) pulley (b) lever (c) wheel and axle (d) screw
17. 17.⚖️ Along a straight bar, measured from the left end, the effort is at 40 cm, the fulcrum at 80 cm and the load at 10 cm. Which class of lever is it? (a) class 3 (b) class 2 (c) class 1
18. 18.True or false: a grippy rubber sole gives more friction. (a) False (b) True
19. 19.💪 Two children push a box to the right, one with 85 N and the other with 40 N. What is the net (total) force on the box, in newtons?
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 4 N, a carpet 5 N, ice 1 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
21. 21.⚙️ A wedge is … (a) a bar on a pivot (b) a wheel on a rod (c) a rope on a wheel (d) two ramps back to back
22. 22.🛞 Friction acts … (a) only on ice (b) with the motion (c) against the motion (d) only upwards
23. 23.💪 Is kicking a football a push or a pull? (a) a pull (b) a push
24. 24.⚖️ Which class of lever is a pair of pliers? (a) class 1 (b) class 2 (c) class 3
25. 25.🪝 A wheel and axle is a big wheel fixed to … (a) a loose rope (b) a flat ramp (c) a sharp wedge (d) a smaller rod (axle)
26. 26.🪝 What does a single fixed pulley change? (a) the size of the load (b) the direction of pull (c) gravity (d) the colour of rope
27. 27.⚖️ Along a straight bar, measured from the left end, the effort is at 50 cm, the fulcrum at 0 cm and the load at 20 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
28. 28.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 2 m, how many metres of rope must you pull?
29. 29.💪 Two children push a box to the right, one with 5 N and the other with 60 N. What is the net (total) force on the box, in newtons?
30. 30.⚖️ Which class of lever is a beam balance? (a) class 1 (b) class 2 (c) class 3
31. 31.⚖️ A lever bar balances. The load is ? N at 10 cm from the fulcrum. The effort is 60 N at 50 cm from the fulcrum on the other side. What is the missing force in newtons?
32. 32.💪 Is pulling a cart a push or a pull? (a) a push (b) a pull
33. 33.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
34. 34.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
35. 35.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
36. 36.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
37. 37.⚙️ A screw is really … (a) a ramp wrapped round (b) a kind of wheel (c) a bent lever (d) a tiny pulley
38. 38.True or false: a wheelchair ramp is an inclined plane. (a) False (b) True
39. 39.⚖️ Turning effect = force × … (a) distance from fulcrum (b) mass of fulcrum (c) time taken (d) colour of bar
40. 40.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) ice (d) glass

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