A ball is thrown upward its initial vertical component of velocity of 20 m/s and its initial horizontal component of velocity is 10 m/s what is the balls speed three seconds later

Explaination:

Jjh

answer: a. same unit

explanation:

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west