Question
Mike throws a ball upward & toward the east at a 20.0 angle with a speed of 51.0 . Nancy drives east past Mike at 15.0 at the instant he releases the ball.
What is the ball's initial angle in Nancy's reference frame?
What is the ball's initial angle in Nancy's reference frame?
Answers
Elena
v(x) = v•cosα = 51•cos20 = 47.9 m/s.
Relative velocity
v(x-rel)= 47.9-15 = 32.9 m/s.
v(y) = v•sin20 =17.4 m/s.
tanφ = v(y)/v(x-rel) = 17.4/32.9 = 0.53.
φ = 27.9º
Relative velocity
v(x-rel)= 47.9-15 = 32.9 m/s.
v(y) = v•sin20 =17.4 m/s.
tanφ = v(y)/v(x-rel) = 17.4/32.9 = 0.53.
φ = 27.9º