Which has more momentum, a #8kg# object moving at #9m/s# or a #4kg# object moving at #7m/s#?

Answer 1

The one with the mass of #8# #kg# and moving #9# #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=mv#

# =(8kg)(9m/s)#

#=72N s#

while the second object:

#p=mv#

#=(4kg)(7m/s)#

#=28N s#

So the object which has more momentum is the first object

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Answer 2

Amelia Adams

To calculate momentum, you use the equation (p = mv), where (p) is momentum, (m) is mass, and (v) is velocity.

For the first object: (p = 8 , \text{kg} \times 9 , \text{m/s} = 72 , \text{kg m/s}).

For the second object: (p = 4 , \text{kg} \times 7 , \text{m/s} = 28 , \text{kg m/s}).

Therefore, the 8kg object moving at 9m/s has more momentum.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.