Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 28 · 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 box weighs 350 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
2. 2.⚖️ A lever bar balances. The load is 900 N at 20 cm from the fulcrum. The effort is 200 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
3. 3.🪝 Fixed or movable pulley: which one needs effort = load? (a) a movable pulley (b) a fixed pulley
4. 4.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
5. 5.⚖️ A seesaw balances. Asha (280 N) sits 3 m from the pivot on one side; Zoya (? N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
6. 6.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) polished marble (d) ice
7. 7.⚖️ Turning effect = force × … (a) time taken (b) colour of bar (c) distance from fulcrum (d) mass of fulcrum
8. 8.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
9. 9.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
10. 10.True or false: pushing a swing is a push. (a) False (b) True
11. 11.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 1 N, a glass sheet 3 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
13. 13.⚖️ A lever bar balances. The load is 210 N at ? cm from the fulcrum. The effort is 90 N at 70 cm from the fulcrum on the other side. What is the missing distance in centimetres?
14. 14.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
15. 15.🪝 A well winch has a handle (wheel) of radius 12 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
16. 16.True or false: an axe blade is a lever. (a) False (b) True
17. 17.🪝 What does a single fixed pulley change? (a) gravity (b) the size of the load (c) the direction of pull (d) the colour of rope
18. 18.⚙️ Which simple machine is a wheelchair ramp? (a) inclined plane (b) wheel and axle (c) pulley (d) lever
19. 19.🪝 A bucket weighing 280 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 6 N, a carpet 8 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a glass sheet (d) a carpet
21. 21.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
22. 22.💪 Which force is at work: pedalling a cycle? (a) friction (b) magnetic force (c) gravity (d) muscular force
23. 23.💪 Two children push a box to the right, one with 35 N and the other with 80 N. What is the net (total) force on the box, in newtons?
24. 24.True or false: powder on a carrom board gives less friction. (a) True (b) False
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.🪝 A bucket weighing 420 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
27. 27.🔍 Which is the odd one out? (a) a steering wheel (b) a screw jack (c) a nut and bolt (d) a bottle cap
28. 28.⚖️ In a class 1 lever, what is in the middle? (a) the effort (b) the fulcrum (c) the load (d) nothing
29. 29.💪 A box weighs 140 N. Taking 1 kg to weigh about 10 N, what is its mass in kilograms?
30. 30.⚖️ In a class 3 lever, what is in the middle? (a) the pulley (b) the effort (c) the fulcrum (d) the load
31. 31.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
32. 32.⚖️ A seesaw balances. Meena (? N) sits 3 m from the pivot on one side; Kabir (450 N) sits 2 m from the pivot on the other side. What is the missing weight in newtons?
33. 33.⚖️ A seesaw balances. Kabir (170 N) sits ? m from the pivot on one side; Arjun (680 N) sits 1 m from the pivot on the other side. What is the missing distance in metres?
34. 34.⚖️ A seesaw balances. Meena (100 N) sits 2 m from the pivot on one side; Zoya (200 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
35. 35.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
36. 36.True or false: a bottle opener is a class 2 lever (load in the middle). (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a wet tiled floor (b) powder on a carrom board (c) oil on a squeaky hinge (d) a tyre with deep treads
38. 38.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
39. 39.💪 A cart is pulled to the right with 20 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
40. 40.⚖️ To lift a heavy rock with a crowbar more easily, push … (a) on the fulcrum (b) near the fulcrum (c) on the rock (d) far from the fulcrum

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