Advertisements
Advertisements
प्रश्न
Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. Which of the two has the greater kinetic energy?
Advertisements
उत्तर
The toy car ‘A’ of mass 500 gm has the greater kinetic energy. This can be explained as:
K.E. = 1/2 Mv2
Here, both the cars are moving with the same speed. So the car with greater mass will possess greater kinetic energy.
APPEARS IN
संबंधित प्रश्न
Which of the following produces more heat (per unit mass) on burning?
A bucket full of water .is on the first floor of your house and another identical bucket with same quantity of water is kept on the second floor. Which of the two has greater potential energy ?
Give one example to show that the sum of potential energy and kinetic energy remains constant if friction is ignored.
Write an expression for the potential energy of a body of mass m placed at a height h above the earth's surface. State the assumptions made, if any.
State the energy transformation on the following:
Electricity is obtained from nuclear energy.
Name the energy changes for the following:
electric ball
What kind of energy is possessed in a situation when?
A stone lying on the top of roof.
What kind of energy is possessed in a situation when?
A fish moving in the water.
State two advantages and two disadvantages of using hydro-energy for producing electricity.
A body of mass 50 kg has a momentum of 3000 kg−1 ms. Calculate:
(j) the kinetic energy of the body.
(ii) the velocity of the body.
