Under what conditions will a moving 0.030 kg marble and a moving 2.43 kg rock have the same kinetic energy

To have the same kinetic energy the speed of the marble must be 9 times the speed of rock.

Explanation:

The general formula of kinetic energy is given as follows:

where,

K.E = Kinetic Energy

m = mass of the object

v = speed of the object

So, for the marble and rock to have same kinetic energy, we can write:

Hence, to have the same kinetic energy the speed of the marble must be 9 times the speed of rock.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.