Physics, 22.01.2021 05:20 barstr9146

A 19 kg child is riding a 5.6 kg bike with a velocity of 5.0 m/s to the northwest.
a) What is the total momentum of the child
and the bike together?
Answer in units of kg. m/s.
What is the momentum of the child?
Answer in units of kg. m/s.
c) What is the momentum of the bike?
Answer in units of kg. m/s

Answers: 1

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Answers

$\mathrm{a.\:}123\:\mathrm{kg\cdot m/s},\\\mathrm{b.\:}95\:\mathrm{kg\cdot m/s},\\\mathrm{c.\:}28\:\mathrm{kg\cdot m/s}$

Explanation:

The momentum of an object is given by:

p=mv , where is the mass of the object and is the velocity of the object.

The mass of the child and bike together is 19+5.6=24.6 kilograms. Since they're moving at a velocity of 5.0 m/s, their momentum is:

$p=24.6\cdot 5=\fbox{$123\:\mathrm{kg\cdot m/s}$}$ .

The mass of the child is given as 19 kg. Since the child is on the bike moving at 5.0 m/s, it's implied the child is as well. Therefore, the momentum of the child is:

$p=19\cdot 5=\fbox{$95\:\mathrm{kg\cdot m/s}$}$ .

c) The mass of the bike is given as 5.6 kg and it is moving at 5.0 m/s. Therefore, the momentum of the bike is:

$p=5.6\cdot 5=\fbox{$28\:\mathrm{kg\cdot m/s}$}$

Answer from: Quest

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Answer from: Quest

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A 19 kg child is riding a 5.6 kg bike with a velocity of 5.0 m/s to the northwest.
a) What is...

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