Who has more momentum a person running or the same person walking?

A) Walking
B) Runing
D) It depends on the mass
D) All of the above

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

Anybody wanna ? (picture included? )