Answer:
3000 Joules
Step-by-step explanation:
Hello, I can help you with this.
the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.it is given by:

Step 1
all you have to do is to put the values into the equation
Let
m= 15 kg
speed=20 m/s

by definition

so, the kinetic energy of the block is 3000 Joules
I hope it helps, Have a great day.