Question
A 49-kg lead ball is dropped from the leaning tower of Pisa. The tower is 54 m high.
(a) How far does the ball fall in the first 2.4 seconds of flight?
(b) What is the speed of the ball after it has traveled 4.1 m downward?
(c) What is the speed of the ball 1.7 s after it is released?
(a) How far does the ball fall in the first 2.4 seconds of flight?
(b) What is the speed of the ball after it has traveled 4.1 m downward?
(c) What is the speed of the ball 1.7 s after it is released?
Answers
Damon
Galileo says:
Who cares what the mass is ?
How far does anything fall in 2.4 s if dropped on a planet where g = 9.81 m/s^2 ??
d = (1/2) a t^2
d = (1/2)(9.81) (2.4)^2
(b) d = 4.1
4.1 = (1/2) (9.81)(t^2)
solve for t
v = Vi + a t
v = 0 + 9.81 t
(c) v = 0 + 9.81 t = 9.81 (1.7)
Now surely this is in your text ?
Who cares what the mass is ?
How far does anything fall in 2.4 s if dropped on a planet where g = 9.81 m/s^2 ??
d = (1/2) a t^2
d = (1/2)(9.81) (2.4)^2
(b) d = 4.1
4.1 = (1/2) (9.81)(t^2)
solve for t
v = Vi + a t
v = 0 + 9.81 t
(c) v = 0 + 9.81 t = 9.81 (1.7)
Now surely this is in your text ?