Answer:
The linear momentum of an object is given by:
p = mv
where
m is the mass
v is the velocity
Let's apply this formula to the 4 cases:
a) proton
m = 1.67 10-27 kg
v = 5.10 10^6 m/s
Momentum: [tex]p=mv=(1.67\cdot 10^{-27} kg)(5.1\cdot 10^6 m/s)=8.52\cdot 10^{-21}kg m/s[/tex]
(b) bullet
m = 15.0 g = 0.015 kg
v = 480 m/s
Momentum: [tex]p=mv=(0.015 kg)(480 m/s)=7.2 kg m/s[/tex]
(c) Sprinter
m = 72.5 kg
v = 10.5 m/s
Momentum: [tex]p=mv=(72.5 kg)(10.5 m/s)=761.3 kg m/s[/tex]
(d) Earth
m = 5.98 10^24 kg
v = 2.98 10^4 m/s
Momentum: [tex]p=mv=(5.98\cdot 10^{24} kg)(2.98\cdot 10^4 m/s)=1.78\cdot 10^{29} kg m/s[/tex]
