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What is the velocity of a 65 kg runner with 90 kg m/s of momentum.



Sagot :

Answer:

[tex]\boxed {\boxed {\sf v \approx 1.46 \ m/s}}[/tex]

Explanation:

Momentum is the product of mass and velocity.

[tex]p=mv[/tex]

We know the mass is 65 kilograms and the momentum is 90 kilograms meters per second.

[tex]m= 65 \ kg \\p= 95 \ kg \ m/s[/tex]

Substitute the values into the formula.

[tex]95 \ kg \ m/s= 65 \ kg *v[/tex]

Since we are solving for velocity, we must isolate the variable (v). It is being multiplied by 65 kg. The inverse of multiplication is division, so we divide.

[tex]\frac {95 \ kg \ m/s}{65 \ kg }= \frac {65 \ kg *v}{65 \ kg}[/tex]

[tex]\frac {95 \ kg \ m/s}{65 \ kg }=v[/tex]

The kilograms cancel when divided.

[tex]1.46153846 \ m/s=v[/tex]

Let's round to the nearest hundredth. The 1 (in the thousandth place) tells us to leave the 6.

[tex]1.46 \ m/s \approx v[/tex]

The velocity is approximately 1.46 meters per second.