A rock is dropped from the top of a vertical cliff and takes 3.00 s to reach the ground below the cliff.A second rock is thrown vertically from the cliff,and it takes this rock to reach the ground below the cliff from the time it is released.With what velocity was the second rock thrown,assuming no air resistance?
A) 4.76 m/s upward
B) 5.51 m/s downward
C) 12.3 m/s upward
D) 4.76 m/s downward
E) 12.3 m/s downward

Question

A rock is dropped from the top of a vertical cliff and takes 3.00 s to reach the ground below the cliff.A second rock is thrown vertically from the cliff,and it takes this rock  to reach the ground below the cliff from the time it is released.With what velocity was the second rock thrown,assuming no air resistance?
A) 4.76 m/s upward 
B) 5.51 m/s downward 
C) 12.3 m/s upward 
D) 4.76 m/s downward 
E) 12.3 m/s downward

Quizplus · Accepted Answer

The Answer of A rock is dropped from the top of a vertical cliff and takes 3.00 s to reach the ground below the cliff.A second rock is thrown vertically from the cliff,and it takes this rock  to reach the ground below the cliff from the time it is released.With what velocity was the second rock thrown,assuming no air resistance?
A) 4.76 m/s upward 
B) 5.51 m/s downward 
C) 12.3 m/s upward 
D) 4.76 m/s downward 
E) 12.3 m/s downward

A Rock Is Dropped from the Top of a Vertical