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RideAnS [48]
3 years ago
7

A 30 kg child rides a 20 kg bicycle. Together, the child and the bicycle have a momentum of 110 kg-m/s. What is the velocity of

the boy and the bicycle?
Physics
1 answer:
love history [14]3 years ago
8 0

Answer:

The velocity of the boy and the bicycle is 2.2 m/s.

Explanation:

We have,

Mass of child is 30 kg and the mass of bicycle is 20 kg. The combined momentum of the child and the bicycle is 110 kg-m/s.

It is required to find the velocity of the boy and the bicycle. The momentum of an object is given in terms of mass and its velocity. So,

p=Mv

M is combined mass of child and bicycle

v=\dfrac{p}{M}\\\\v=\dfrac{110}{30+20}\\\\v=2.2\ m/s

So, the velocity of the boy and the bicycle is 2.2 m/s.

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jek_recluse [69]
  • Mass=0.25kg
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\\ \sf{:}\!\implies F=ma

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\\ \sf{:}\!\implies Acceleration=\dfrac{8}{0.25}

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5 0
3 years ago
Lucas is carrying his rock collection into class. He carries 30 pounds of rare rocks 15 feet into Classroom 6. It takes him 3 mi
weqwewe [10]

you would multiply 30 by 15. because its the weight times the distance.

3 0
3 years ago
Read 2 more answers
Define potential energy. Give its mathematical formula and SI unit.
Stels [109]

Answer:

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Its formula: PE= mgh

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Hope it helps you..

3 0
3 years ago
Please help me<br> the formula is E = P x t
Rainbow [258]

The battery doesn't 'use' power.  The battery <em>produces</em> the power that all the other electrical devices use.

If the starter motor is using 2,520 watts, then the battery is producing energy at the rate of 2,520 watts.  That means <em>2,520 Joules</em> of energy every second.

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E = P x t

Energy = Power x Time

Energy = (2,520 watts) x (1 second)

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6 0
3 years ago
Help me with this please!!!!!!!!!!!!!!!!
olga55 [171]

Answer:

what do you need help with?

Explanation:

I would look up the periodic table of elements

hope this helps!

6 0
2 years ago
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