Physics

Given that the kinetic energy at a speed of 3 m/s is 45 J, we can find the mass of the bicycle first, then use it to calculate the kinetic energy at 2 m/s.

 

The formula for kinetic energy is:

We can rearrange the formula to solve for mass:

 

Where:

m is the mass of the bicycle,

KE is the kinetic energy, and

v is the velocity of the bicycle.

 

Given:

KE = 45 J

v = 3 m/s

 

Plugging in the values, we get:

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