At time t = 0 seconds, a ball is thrown vertically upward from the top of a building that is 76 metres high. The height of the ball above ground t seconds later is given by h = 76 + 39.2t - 9.8 m (until the ball hits the ground). At what speed does it hit the ground (to the nearest tenth of a metre per second)?
A) 200.0 m/s
B) 230.4 m/s
C) 215.6 m/s
D) 245.9 m/s
E) 237.8 m/s

Question

At time t = 0 seconds, a ball is thrown vertically upward from the top of a building that is 76 metres high. The height of the ball above ground t seconds later is given by h = 76 + 39.2t - 9.8  m (until the ball hits the ground). At what speed does it hit the ground (to the nearest tenth of a metre per second)?
A) 200.0 m/s 
B) 230.4 m/s 
C) 215.6 m/s 
D) 245.9 m/s 
E) 237.8 m/s

Quizplus · Accepted Answer

The Answer of At time t = 0 seconds, a ball is thrown vertically upward from the top of a building that is 76 metres high. The height of the ball above ground t seconds later is given by h = 76 + 39.2t - 9.8  m (until the ball hits the ground). At what speed does it hit the ground (to the nearest tenth of a metre per second)?
A) 200.0 m/s 
B) 230.4 m/s 
C) 215.6 m/s 
D) 245.9 m/s 
E) 237.8 m/s

At Time T = 0 Seconds, a Ball Is Thrown