Which has more momentum, a #4kg# object moving at #4m/s# or a #5kg# object moving at #9m/s#?

1 Answer
Mar 26, 2018

Answer:

Second object.

Explanation:

Momentum is given by the equation,

#p=mv#

  • #m# is the mass of the object in kilograms

  • #v# is the velocity of the object in meters per second

We got:

#p_1=m_1v_1#

Substitute in given values,

#p_1=4 \ "kg"*4 \ "m/s"#

#=16 \ "m/s"#

Then,

#p_2=m_2v_2#

Same thing, substitute in given values,

#p_2=5 \ "kg"*9 \ "m/s"#

#=45 \ "m/s"#

We see that #p_2>p_1#, and so the second object has more momentum than the first object.