Answer:
The combined mass of Danny and his skateboard = m = 72.5 kg
Step-by-step explanation:
Force applied by john = F = 29N
Danny’s Acceleration = a = 0.4 m/s
Combined mass of Danny and his skateboard = m = ?
According to Newton’s second law of motion:
F = ma
m = F/a
m = 29/0.4
m = 72.5 kg
Hence, the combined mass of Danny and his skateboard will be 72.5 Kg.