A piece of wire of length 12m is stretched through 2.5cm by a mass of 5 kg. assuming that the wire obeys the Hookes law,...

A piece of wire of length 12m is stretched through 2.5cm by a mass of 5 kg. assuming that the wire obeys the Hookes law, what force will stretch it through 4.0 cm.

---

F=ke
50 = K × 0.025
K = 2000

---

Kavungya answered the question on May 20, 2019 at 09:09

Exams With Marking Schemes

• Grade 1
• Grade 2
• Grade 3
• Grade 4
• Grade 5
• Grade 6
• Grade 7
• Grade 8
• Grade 9
• PP1
• PP2
• Playgroup
• Form 1
• Form 2
• Form 3
• Form 4

Related Questions

---

• An object of the mass 150kg moving at 20m/s collides with a stationary object of mass 90kg.They couple after collision .Determine the : (i) Total momentum... (Solved)
  

  An object of the mass 150kg moving at 20m/s collides with a stationary object of mass 90kg.They couple after collision .Determine the :
  (i) Total momentum before collision
  (ii) Total momentum after collision
  (iii) Their common velocity after collision

  Date posted: May 20, 2019 .    Answers (1)

• State what provides centripetal force for an electron moving round the nucleus. (Solved)
  

  State what provides centripetal force for an electron moving round the nucleus.

  Date posted: May 20, 2019 .    Answers (1)

• The figure below shows a metallic rod of length 10cm and uniform cross-sectional area 4cm² suspended from spring balance with 7.5 cm of its length... (Solved)
  

  The figure below shows a metallic rod of length 10cm and uniform cross-sectional area 4cm² suspended from spring balance with 7.5 cm of its length immersed in water. The density of the material is 1.5g/cm³.The density of water is 1 g/cm³
  
  Determine:
  i) The mass of the rod
  ii) The upthrust acting on the rod
  iii) The reading 0f the spring balance
  iv) The reading of the spring balance when the rod is wholly immersed in water

  Date posted: May 20, 2019 .    Answers (1)

• The figure below shows velocity-time graphs of two objects A and B drawn on same axes The two objects are of equal masses. The same size... (Solved)
  

  The figure below shows velocity-time graphs of two objects A and B drawn on same axes
  
  The two objects are of equal masses. The same size of force is applied against each object. State
  with a reason which of the two objects stops in a shorter distance.

  Date posted: May 20, 2019 .    Answers (1)

• On the axis provided sketch a graph of mechanical advantage (MA) against load for a pulley system (Solved)
  

  On the axis provided sketch a graph of mechanical advantage (MA) against load for a pulley
  system
  

  Date posted: May 20, 2019 .    Answers (1)

• Water flows steadily along a horizontal pipe at a volume rate of 8.0×10^-3m³/s.If the cross-section area of the pipe is 20cm². Calculate the velocity of... (Solved)
  

  Water flows steadily along a horizontal pipe at a volume rate of 8.0×10^-3m³/s.If the cross-section area of the pipe is 20cm². Calculate the velocity of the fluid.

  Date posted: May 20, 2019 .    Answers (1)

• Explain how loose clothing may affect safety in the laboratory (Solved)
  

  Explain how loose clothing may affect safety in the laboratory

  Date posted: May 20, 2019 .    Answers (1)

• State two practical applications of stability (Solved)
  

  State two practical applications of stability

  Date posted: May 20, 2019 .    Answers (1)

• The figure below shows a uniform meter rule balanced at the 20 cm mark when a mass of 50g is hanging from its zero cm... (Solved)
  

  The figure below shows a uniform meter rule balanced at the 20 cm mark when a mass of 50g is hanging from its zero cm mark
  
  Calculate the weight of the rule

  Date posted: May 20, 2019 .    Answers (1)

• The figure below shows a section of a solar heater Explain; i) Why the pipeline is fixed to a dark coloured collector plate ii) Why is pipe coloured... (Solved)
  

  The figure below shows a section of a solar heater
  
  Explain;
  i) Why the pipeline is fixed to a dark coloured collector plate
  ii) Why is pipe coloured several times
  iii) Why is pipe made of copper
  iv) Why is the collector plate fixed to an insulator?
  v) Why the panel front covered with glass

  Date posted: May 20, 2019 .    Answers (1)

• A car weighs 12 000N. i. What is the force acting on one tyre if the weight is evenly distributed amongst the tyres? ii. If the area... (Solved)
  

  A car weighs 12 000N.
  i. What is the force acting on one tyre if the weight is evenly distributed amongst
  the tyres?
  ii. If the area of contact of tyre is 80cm².Calculate the pressure of the air in the tyre.

  Date posted: May 20, 2019 .    Answers (1)

• You are provided with a test – tube, thread and a meter ruler. Outline the steps you would use to measure the circumference and hence... (Solved)
  

  You are provided with a test – tube, thread and a meter ruler. Outline the steps you would use to measure the circumference and hence the diameter of the test – tube.

  Date posted: May 20, 2019 .    Answers (1)

• The figure below shows a rubber sucker, explain why the sucker sticks on a clean flat Surface. (Solved)
  

  The figure below shows a rubber sucker, explain why the sucker sticks on a clean flat
  Surface.
  

  Date posted: May 20, 2019 .    Answers (1)

• A micrometer screw gauge has a zero error of -0.03mm. It is used to measure the diameter of a wire. If the actual diameter of... (Solved)
  

  A micrometer screw gauge has a zero error of -0.03mm. It is used to measure the diameter of a wire. If the actual diameter of the wire is 0.30mm, draw the micrometer screw gauge showing the measured diameter of the wire.

  Date posted: May 20, 2019 .    Answers (1)

• Water falls through a height of 60 m at a rate of flow of 1.0x10^5 per minute. Calculate the amount of power generated at the base... (Solved)
  

  Water falls through a height of 60 m at a rate of flow of 1.0x10^5 per minute. Calculate the amount of power generated at the base of the water fall (the mass of 1 litre of water is 1 kg)
  

  Date posted: May 19, 2019 .    Answers (1)

• An aeroplane is moving horizontally through still air at a uniform speed. It is observed that when the speed of the plane is increased, its height above... (Solved)
  

  An aeroplane is moving horizontally through still air at a uniform
  speed. It is observed that when the speed of the plane is increased, its
  height above the ground increases. State the reason for this observation.

  Date posted: May 7, 2019 .    Answers (1)

• Give the molecular explanation of Charles’ law. (Solved)
  

  Give the molecular explanation of Charles’ law.

  Date posted: April 24, 2019 .    Answers (1)

• Give the molecular explanation of Boyle’s law. (Solved)
  

  Give the molecular explanation of Boyle’s law.

  Date posted: April 24, 2019 .    Answers (1)

• Describe an experiment that can be used to verify the Boyle’s law (Solved)
  

  Describe an experiment that can be used to verify the Boyle’s law

  Date posted: April 24, 2019 .    Answers (1)

• Using Young’s double slit experiment demonstrate the interference of light waves. (Solved)
  

  Using Young’s double slit experiment demonstrate the interference of light waves.

  Date posted: April 24, 2019 .    Answers (1)