Advertisements
Advertisements
प्रश्न
A moving body weighing 400 N possesses 500 J of kinetic energy. Calculate the velocity with which the body is moving. (g = 10 ms2)
Advertisements
उत्तर
Given : Weight = 400 N,
W = mg
400 = m × 10
m = 40 kg
Now, Kinetic Energy =`1/2"mv"^2`
`500 =1/2xx40xx"v"^2`
v = 5 m/s
संबंधित प्रश्न
What is the source of heat contained in geothermal energy?
Can a body possess energy even when it is not in motion ? Explain your answer with an example.
Give one example to show the conversion of potential energy to kinetic energy when put in use.
How is wind energy used to produce electricity?
Explain the principle of generating electricity from hydro energy.
Name the energy change for the following:
pendulum
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
How is kinetic energy possessed by a moving body measured?
State two advantages and disadvantages of using wind energy for producing electricity.
Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).
