A ball is thrown vertically upward from the top of a building that is 57 metres high. The height of the ball above ground at t seconds later is given by h = 57 + 12t - 9.8 m. Find the initial speed of the ball.
A) 6 m/s
B) 12 m/s
C) 9.8 m/s
D) 57 m/s
E) 19.6 m/s

Question

A ball is thrown vertically upward from the top of a building that is 57 metres high. The height of the ball above ground at t seconds later is given by h = 57 + 12t - 9.8  m. Find the initial speed of the ball.
A) 6 m/s 
B) 12 m/s 
C) 9.8 m/s 
D) 57 m/s 
E) 19.6 m/s

Quizplus · Accepted Answer

The Answer of A ball is thrown vertically upward from the top of a building that is 57 metres high. The height of the ball above ground at t seconds later is given by h = 57 + 12t - 9.8  m. Find the initial speed of the ball.
A) 6 m/s 
B) 12 m/s 
C) 9.8 m/s 
D) 57 m/s 
E) 19.6 m/s

A Ball Is Thrown Vertically Upward from the Top of a Building