a body with mass m is sliding over a slope the angle of the slope is 47 degrees for 5 seconds find the momentum of the body?

Question

Are all the things given 

Answer 1

I agree with all the mathematics of Philip, I disagree with the units because momentum is the same as amount of movement and the units are never length.

 

Answer 2

The acceleration of the mass (m) due to gravity (g = 9.8 m/s²) can be resolved into a component normal to the slope, a_n, and one parallel to the slope, a_p.

 

a_n = g*cos(47^o)

 

a_p = g*sin(47^o)

 

The component normal to the slope will account for the frictional force, but since no frictional coefficient is given, I think we can assume the mass is sliding without friction.  The momentum, then, will be due solely to a_p, the component of acceleration parallel to the slope:

 

p = mv = m*a_p*t = m*(9.8)*sin(47^o)*(5) = 35.84*m  Newton-seconds

 

Where 35.84 is the object's velocity after 5 seconds (in meters/sec) and m is the unspecified value of the object's mass.  Does the problem provide the value of m?