A remote-controlled toy sled has a mass of 4.0 kg and accelerates at 3.0 m s−23.0\ \mathrm{m\,s^{-2}}3.0 ms−2.
What is the resultant force on the sled?
12 N12\ \mathrm{N}12 N
0.75 N0.75\ \mathrm{N}0.75 N
7.0 N7.0\ \mathrm{N}7.0 N
1.3 N1.3\ \mathrm{N}1.3 N