Mass of the block = 2/g = 2/9.8 =0.204 kg.
Frictional force = mass * acceleration
a = F/ m where F is the frictional force = 2.4
a = 2.4/ 0.204 = 11.76 m/s^2
Kinetic energy is movement so A
Potential is still so false
Personally this helps me:
Control- variable that stays the same
Independent variable- variable that changes
Dependent variable- variable being tested/ data
The answer would be absorbs heat