Which has more momentum, a $8 k g$ $8kg$ object moving at $9 \frac{m}{s}$ $9m/s$ or a $4 k g$ $4kg$ object moving at $7 \frac{m}{s}$ $7m/s$ ?

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Answer 1 · 2015-12-29T04:27:23

The one with the mass of $8$ $8$ $k g$ $kg$ and moving $9$ $9$ $\frac{m}{s}$ $m/s$ has more momentum.

The momentum of an object can be calculated using the formula p=mv where p is the momentum and m is the mass and v is the velocity.

So, the momentum of the first object is:

$p = m v$ $p=mv$

$= (8 k g) (9 \frac{m}{s})$ $=(8kg)(9m/s)$

$= 72 N s$ $=72N s$

while the second object:

$p = m v$ $p=mv$

$= (4 k g) (7 \frac{m}{s})$ $=(4kg)(7m/s)$

$= 28 N s$ $=28N s$

So the object which has more momentum is the first object

Which has more momentum, a 8kg8kg object moving at 9ms9m/s or a 4kg4kg object moving at 7ms7m/s?