Question

An object's speed is 2.40 m/s and its momentum is 120.0 kg * m/s. What is the mass of the object?

A. 290 kg
B. 0.0200 kg
C. 12.0 kg
D. 50.0 kg

**not sure!! thank you!!

Answer 1

here we have to apply the definition of momentum P of a particle, whose mass is m, and whose velocity is v:
\[P = mv\]

Answer 2

ohh okay!! so 2.4 * 120? = 288?

so about 290? choice A is our solution?

Answer 3

no, it is:
\[\Large m = \frac{P}{v} = \frac{{120}}{{2.4}}\]

Answer 4

ohh okay so 50? our solution is choice D?

Answer 5

correct!

Answer 6

yay! thank you!!

Answer 7

thanks!! :)