# science

solved a ball is dropped from the top of a tower 100 meter high. simultaneously another ball is thrown upwards from ground with a speed of 50 m/s . after what time do they cross each other.

1. 👍 0
2. 👎 0
3. 👁 133
1. h1 = -1/2 g t^2 + 100

h2 = -1/2 g t^2 + 50 t

the balls cross when h1 equals h2

looks like 2 sec

1. 👍 0
2. 👎 0
posted by scott
2. question cant be solved untill its is clear whether its a free falling case or not.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Physics

A 58.7-kg lead ball is dropped from the Leaning Tower of Pisa. The tower is 55.0 m high. A) How far does the ball fall in the first 3.08 seconds of flight? = 46.5 m B) What is the speed of the ball after it has traveled 2.10 m

asked by Anon on December 9, 2017
2. ### Physics

A stone is thrown vertically upward from the top of the tower with a velocity of 15m / s. Two seconds later a second stone is dropped from the top of the tower.if both the stone strike the ground simultaneously find the height of

asked by Anonymous on September 28, 2014
3. ### college physics

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)

asked by Monika on September 7, 2014
4. ### Physics

A 57-kg lead ball is dropped from the leaning tower of Pisa. The tower is 56 m high. (b) What is the speed of the ball after it has traveled 2.5 m downward?

asked by Anonymous on January 22, 2012
5. ### physics

A 49-kg lead ball is dropped from the leaning tower of Pisa. The tower is 55 m high. (c) What is the speed of the ball 1.3 s after it is released?

asked by Sherry on September 4, 2012
6. ### science

find the velocity with which it hits the ground when a body is projected horizontally from top of a tower 100 meter high with a velocity of 9.8 meter per second.

asked by avinash on March 31, 2015
7. ### Math

The height(h) of an object that has been dropped or thrown in the air is given by: h(t)=-4.9t^2+vt+h t=time in seconds(s) v=initial velocity in meters per second (m/s) h=initial height in meters(m) A ball is thrown vertically

asked by NeedHelp on April 4, 2012
8. ### math

from the top of a tower, the angle of depression of a boat is 30 degree. if the tower is 20 meter high, how far is the boat from the foot of the tower?

asked by kevin spence on May 20, 2011
9. ### Physics

A ball is allowed to fall from the top of the tower 200m high. At the same instant another ball is thrown vertically upwards from the bottom of the tower with velocity of 40m/s. When and where the two balls meet?

asked by Aveena on June 18, 2017
10. ### Math

The height(H) of an object that has been dropped or thrown in the air is given by: H(t)=-4.9t^2+vt+h t=time in seconds(s) v=initial velocity in meters per second (m/s) h=initial height in meters(m) H=height h=initial height I

asked by Anonymous on April 4, 2012

More Similar Questions