No trouble at all!
So the first thing we want to consider is what is the formula for kinetic energy?
This is KE = (1/2)*m*v^2, where m is mass and v is velocity.
Now, we are given two masses, because these are combined (with the bicyclist on the cycle) I am going to add them together: 59.5 + 10 = 69.5 kg
Finally, they want the total KE before accelerating, meaning we will use the 10.3 m/s as it is before acceleration. Now we will put this together in the equation:
KE = (1/2)*69.5*10.3^2 = 3,686.6 J
Please let me know if this made sense and if you have any other questions.
