What is the momentum of a 76-kilogram horse running at a speed of 45 kilometers/hour?

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Answer 1 · 2016-06-08T19:09:38

It is #950# #kg*m/s#.

The momentum is defined as

#P=mv#

we only need to transform the velocity in #m/s#.

We know that #1 km=1000m# and #1 h=3600 s#.
Then

#45(km)/h=45*1000m/(3600s)=45/3.6# #m/s# = #12.5# #m/s#.

We are ready for #P#

#P=76*12.5=950# #kg*m/s#.