A ball is thrown at a downwards angle from the edge of the rooftop of a building. The initial velocity vector has x- and y-components vix = –7.8 m/s, viy = –7.8 m/s. The ball hits the ground 0.80 s later. As the ball travels from the edge of the rooftop to the ground, which is the greater quantity?
A. Average speed.
B. Magnitude of average velocity.
C. (There is a tie.)
D. (Not enough information is given.)
Answer:A
A ball is thrown at a downwards angle from the edge of the rooftop of a building. The initial velocity vector has x- and y-components vix = –7.8 m/s, viy = –7.8 m/s. The ball hits the ground 0.80 s later. As the ball travels from the edge of the rooftop to the ground, which is the greater quantity?
A. Average speed. B. Magnitude of average velocity. C. (There is a tie.) D. (Not enough information is given.)