The figure below is a uniform bar of length 2.0m pivoted near one end. The bar is balanced horizontal by a spring.

The figure below is a uniform bar of length 2.0 m pivoted near one end. The bar is balanced horizontal by a spring.Given that the tension on the spring is 1.2N, determine the weight of the bar.

---

---

sharon kalunda answered the question on September 10, 2019 at 09:58

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

---

• A constant force is applied to a body moving with a constant speed. State one observable change in the state of motion of the body... (Solved)
  

  A constant force is applied to a body moving with a constant speed. State one observable change in the state of motion of the body likely to occur?

  Date posted: September 10, 2019 .    Answers (1)

• The figure below shows part of micrometer screw gauge with 50 divisions on the thimble scale. Complete the diagram to show a reading of 5.73mm. (Solved)
  

  The figure below shows part of micrometer screw gauge with 50 divisions on the thimble scale. Complete the diagram to show a reading of 5.73mm.
  

  Date posted: September 10, 2019 .    Answers (1)

• The figure below shows a measuring cylinder,which contains water initially at level A. A solid of mass 0.32g is immersed in the water,the level rises... (Solved)
  

  The figure below shows a measuring cylinder,which contains water initially at level A. A solid of mass 0.32g is immersed in the water,the level rises to B.
  
  Determine the density of the solid. (Give your answer to 3 significant figures).

  Date posted: September 10, 2019 .    Answers (1)

• The tube of a CRO is coated with graphite. State three functions of the graphite coating (Solved)
  

  The tube of a CRO is coated with graphite. State three functions of the graphite coating

  Date posted: September 10, 2019 .    Answers (1)

• Distinguish between cathode rays and light rays. (Solved)
  

  Distinguish between cathode rays and light rays.

  Date posted: September 10, 2019 .    Answers (1)

• The figure below show the displacement time graph of a wave traveling at 400cm/s. (Solved)
  

  The figure below show the displacement time graph of a wave traveling at 400cm/s.
  
  Determine for the wave the:
  (i) Amplitude
  (ii) Period
  (iii) Frequency
  (iv) Wavelength

  Date posted: September 10, 2019 .    Answers (1)

• A mason uses a six wheel pulley system to raise a weight of 250N through a vertical height of 2.5m using the machine.If the mason... (Solved)
  

  A mason uses a six wheel pulley system to raise a weight of 250N through a vertical height of 2.5m using the machine.If the mason pulls using an effort of 500N. Calculate:
  i) The velocity ratio of the pulley system.
  ii) The work done by the mason.
  iii) The useful work done by the pulley system.
  iv) The efficiency of the system

  Date posted: September 10, 2019 .    Answers (1)

• The figure below shows a block of mass 50g and density 2000kg/m³ submerged in a certain liquid and suspended from uniform horizontal beam by means... (Solved)
  

  The figure below shows a block of mass 50g and density 2000kg/m³ submerged in a certain liquid and suspended from uniform horizontal beam by means of a string. A mass of 40g suspended from the other end of the beam puts the system in equilibrium
  
  (i) Determine the up-thrust force acting on the block.
  (ii) Calculate the density of the liquid.
  (iii) Calculate the new balance point of the 50g mass (the 40g mass remains fixed) if the liquid was replace with one whose density was 1500kg/m³.

  Date posted: September 10, 2019 .    Answers (1)

• A bullet moving at a velocity of 350m/s hits a tree trunk of diameter 70cm. It emerge from the opposite side with a velocity of... (Solved)
  

  A bullet moving at a velocity of 350m/s hits a tree trunk of diameter 70cm. It emerge from the opposite side with a velocity of 180m/s. Determine the average deceleration of the bullet in the trunk.

  Date posted: September 10, 2019 .    Answers (1)

• The figure below shows an arrangement to demonstrate diffusion through solids. (Solved)
  

  The figure below shows an arrangement to demonstrate diffusion through solids.
  
  The hydrogen gas is supplied for sometimes then stopped and the beaker removed. State and explain what is likely t be observed when the hydrogen gas supply is stopped.

  Date posted: September 10, 2019 .    Answers (1)

• Xcm³ of substance A which has density 800 kg/m³ is mixed with 1000cm³ of water with a density of 1000kg/m³. The density of the mixture... (Solved)
  

  Xcm³ of substance A which has density 800 kg/m³ is mixed with 1000cm³ of water with a density of 1000kg/m³. The density of the mixture is 960kg/m³. Determine the value of X

  Date posted: September 10, 2019 .    Answers (1)

• Water at 20⁰C falls over a waterfall of height 40m. Calculate the temperature of water at the bottom of the waterfall if 80% of potential... (Solved)
  

  Water at 20⁰C falls over a waterfall of height 40m. Calculate the temperature of water at the bottom of the waterfall if 80% of potential energy at the top is converted into heat energy

  Date posted: September 10, 2019 .    Answers (1)

• A fathometer produces sound in a ship and receives two echo‘s where there is a raised sea bank. One after 2.5 seconds and the other... (Solved)
  

  A fathometer produces sound in a ship and receives two echo‘s where there is a raised sea bank. One after 2.5 seconds and the other after 3.0 seconds. Find the height of the raised sea bank if the velocity of sound in water is 1460m/s.

  Date posted: September 10, 2019 .    Answers (1)

• State two factors that affect the efficiency of a pulley system. (Solved)
  

  State two factors that affect the efficiency of a pulley system.

  Date posted: September 10, 2019 .    Answers (1)

• The handle of the screw-jack in the figure below is 42cm long and the pitch of the screw is 0.5cm. (Solved)
  

  The handle of the screw-jack in the figure below is 42cm long and the pitch of the screw is 0.5cm.
  
  (i) Calculate the V.R of the screw jack.
  (ii) Calculate the effort needed to lift the load of 1188N.

  Date posted: September 10, 2019 .    Answers (1)

• A trolley of mass 5kg travelling to the right at 2m/s collides head on with another trolley of mass 3kg travelling at 4m/s to the... (Solved)
  

  A trolley of mass 5kg travelling to the right at 2m/s collides head on with another trolley of mass 3kg travelling at 4m/s to the left. Find their velocity after collision if the collision is perfectly inelastic.

  Date posted: September 9, 2019 .    Answers (1)

• When a mass of 2kg is hang from a single spring, the spring extends by a distance x = 5cm. Determine the total extension in... (Solved)
  

  When a mass of 2kg is hang from a single spring, the spring extends by a distance x = 5cm. Determine the total extension in the set up below given that the springs are identical and weightless.
  

  Date posted: September 9, 2019 .    Answers (1)

• A uniform metre rule is supported by force of 3N and 2N as shown in the figure below.Determine the weight of the half metre rule. (Solved)
  

  A uniform metre rule is supported by force of 3N and 2N as shown in the figure below.Determine the weight of the half metre rule.
  
  
  

  Date posted: September 9, 2019 .    Answers (1)

• Two candles A and B of equal lengths and thickness are joined together and balanced horizontally as shown below. Candle A is lit.State and explain... (Solved)
  

  Two candles A and B of equal lengths and thickness are joined together and balanced horizontally as shown below. Candle A is lit.State and explain what happens after a short time.
  

  Date posted: September 9, 2019 .    Answers (1)

• The figure below shows a burette that was initially filled to 12ml with a liquid of density 0.8g/cm³.The liquid is allowed to run out for... (Solved)
  

  The figure below shows a burette that was initially filled to 12ml with a liquid of density 0.8g/cm³.The liquid is allowed to run out for some time. If the volume of liquid removed from the burette has a mass of 14g,determine the final reading on the burette.
  

  Date posted: September 9, 2019 .    Answers (1)