Question

What's the momentum of a 3.5-kg boulder rolling downhill at 5 m/s? A. 17.5 km·m/s B. 70 kg·m/s C. 8.5 kg·m/s D. 14.3 kg·m/s

Answer 1

Hey There!:

p = m * V

p = 3.5 * 5

p = 17.5 Km.m/s

Answer A

hope this helps!

Answer 2

Answer : The correct option is, (A) $17.5\text{ Kg }m/s$

Solution : Given,

Mass of an object = 3.5 Kg

Velocity of an object = 5 m/s

Momentum : Momentum is equal to the product of mass of an object and the velocity of an object.

Formula used :

$p=m\times v$

where,

p = momentum of an object

m = mass of an object

v = velocity of an object

Now put all the given values in this formula, we get the value of momentum of an object.

$p=(3.5Kg)\times (5m/s)=17.5\text{ Kg }m/s$

Therefore, the momentum of an object is, $17.5\text{ Kg }m/s$