i need sum help asap?

Question

1)Calculate the magnitude of the resultant of a pair of 80 km/h velocity vectors that are at right angles to each other.


2)What are the horizontal and vertical components of a 12 unit vector that is oriented 56° above the horizontal?

3)Calculate the magnitude of the horizontal and vertical components of a vector that is 140 units long and is oriented at 50° from the horizontal.

4)What are the horizontal and vertical components of a 13 unit vector that is oriented 38° above the horizontal?

Answer 1

1) Since the are perpendicular
R= sqrt(V1^2 + V2^2) ans since V1=V2
R=V sqrt(2)
angle =45 deg

2) V=12
Vh= Vcos(56)=12 cos(56)=6.7 units
Vy= Vsin(56)=12 sin(56)=10 units

3) same as 2
4) same again

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