Question

forces that change motion quick check
a hockey puck with a mass of 0.12 kg is traveling across the ice at a velocity of 150 m/s downfield. what is the momentum of the hockey puck? (1 point)
● ( p = 18 \text{ kg}^* \text{m/s} )
○ ( m = 18 \text{ kg}^* \text{m/s} )
○ ( p = 18 \text{ n} )
○ ( p = 8^10 - 4 \text{ kg}^ \text{m/s} )

Explanation:

Step1: Recall the formula for momentum

The formula for momentum \(P\) is \(P = mv\), where \(m\) is mass and \(v\) is velocity.

Step2: Substitute the given values

Given \(m = 0.12\space kg\) and \(v=150\space m/s\). Then \(P=(0.12\space kg)\times(150\space m/s)\).

Step3: Calculate the result

\(P = 0.12\times150=18\space kg\cdot m/s\). Also, check the units: momentum has units \(kg\cdot m/s\), force has units \(N\) (so \(P = 18N\) is wrong as units don't match). \(M\) is not the symbol for momentum (\(P\) is). And \(8\times10 - 4=76
eq18\) so \(P = 8*10 - 4kg\cdot m/s\) is wrong.

Answer:

A. \(P = 18kg\cdot m/s\)