High School

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John coasts on his skateboard at a speed of 4 m/s. He uses his foot to increase his speed to 5 m/s. If he has a mass of 103 kg, what impulse does he apply?

Answer :

103 kg m/s would be the answer
4-5=1*103= 103kg m/s

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Rewritten by : Barada

Answer:

Impulse = 103 kg m/s

Explanation:

As we know that impulse is defined as change in momentum

So here we will have

[tex]Impulse = P_f - P_i[/tex]

here final speed is 5 m/s after he use his foot while his initial speed is given as 4 m/s

now we will have

[tex]P_f = 103 \times 5[/tex]

initial momentum is given as

[tex]P_i = 103 \times 4[/tex]

now impulse is given as

[tex]Impulse = (103 \times 5) - (103 \times 4)[/tex]

[tex]Impulse = 103 kg m/s[/tex]