Answer:
 7560J
Step-by-step explanation:
Given parameters: 
Mass of cyclist and bike = 105kg 
Speed = 12m/s 
Unknown: 
Kinetic energy = ? 
Solution: 
The kinetic energy of a body is the energy due to the motion of a body. 
 It is mathematically expressed as; 
 K.E = 
 m v²
 m v² 
 Insert the parameters: 
 K.E = 
 x 105 x 12² = 7560J
 x 105 x 12² = 7560J