A trolley experiences a constant frictional force. A driving force of 0.60 N gives an acceleration of 0.50 m s−20.50\ \mathrm{m\,s^{-2}}0.50 ms−2. A driving force of 1.40 N gives an acceleration of 1.50 m s−21.50\ \mathrm{m\,s^{-2}}1.50 ms−2. What is the trolley mass?
1.25 kg1.25\ \mathrm{kg}1.25 kg
0.80 kg0.80\ \mathrm{kg}0.80 kg
0.93 kg0.93\ \mathrm{kg}0.93 kg
1.20 kg1.20\ \mathrm{kg}1.20 kg