CBSE Class 9: Conservation of Energy and Power Videos | Power of electric appliance

• An object of mass 1kg is falling from the height h=10m.calculate a) the total energy of an object at h=10m b) potential energy of the object when it is at h=4m c) kinetic energy of the object when it is at h=4m d) what will be the speed of the object when it hits the ground
• when an arrow is shot from its bow it has kinetic Energy. From where does it get the kinetic Energy
• Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km hour
• kinematics
  
• what is energy
• did the kilometer is a SI unit of measurement
• Which energy source is renewable  
• Please solve. 
  
• When do we say that work is done ?
• What is potential energy,kinetical energy,power?

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