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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?
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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.
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संबंधित प्रश्न
Name five different forms of energy.
Give one relevant example for the following transformations of energy:
Chemical energy to heat energy.
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.
What do you understand by the kinetic energy of a body?
MULTIPLE CHOICE TYPE:
The ultimate source of energy is:
(a) wood
(b) wind
(c) water
(d) sun
Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.
What kind of energy is possessed in a situation when?
A fish moving in the water.
State the energy changes which take place when:
A stone projected vertically upwards, returns back to the thrower.
State the energy transformation on the following:
Electricity is obtained from wind energy.
What are the small particles that can be seen in a beam of light that enters a dark room?
