Multiple Choice
A proton of mass 1.6726 × 10^-27 kg and a deuteron of mass 3.34364 × 10^-27 kg have the same amount of kinetic energy. What is the speed of the proton (v_p) in terms of the speed of the deuteron (v_d)?
11. Momentum & Impulse
Intro to Momentum
Multiple Choice
If an electron has mass and velocity , what is its momentum ?
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Verified step by step guidance1
Understand that momentum (\( p \)) is a vector quantity defined as the product of an object's mass (\( m \)) and its velocity (\( v \)).
Recall the fundamental formula for linear momentum: \( p = m \times v \). This means you multiply the mass of the electron by its velocity to find the momentum.
Note that the other given expressions, such as \( p = m^2 v \), \( p = m + v \), or \( p = \frac{m}{v} \), do not correctly represent momentum because momentum depends linearly on both mass and velocity.
Write down the correct formula explicitly: \( p = m v \), where \( p \) is momentum, \( m \) is mass, and \( v \) is velocity.
To find the momentum of the electron, simply multiply its mass by its velocity using the formula \( p = m v \).
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