Advertisements
Advertisements
प्रश्न
A ball falls to the ground as shown below :
What is the kinetic energy of ball when it hits the ground?
Advertisements
उत्तर
Total energy of a free falling object remains conserved.
So,
Kinetic energy at the ground = Potential energy at the top = 80 J
APPEARS IN
संबंधित प्रश्न
A pendulum is oscillating on either side of its rest position. The correct statement is:
A ball of mass 0.5 kg slows down from a speed of 5 m/s so that of 3 m/s. Calculate the change in kinetic energy of the ball. State your answer giving proper units.
An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass 3.5 kg. Both the spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same :
Name the device or machine which convert :
Mechanical energy into electrical energy.
Name the device or machine which convert :
Chemical energy into heat energy.
Name the device or machine which convert :
light energy into heat energy.
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
What do you understand by the term 'transformation of energy"? Explain with an example.
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?
