# math

A flat stone is thrown horizontally across a frozen lake. If the stone decelerates at 2.5 meter per second squared, what is the coefficient of friction between the stone and the ice?take g equals 10 meter per second

1. 👍 0
2. 👎 0
3. 👁 108
mu m g = m a = 2.5 m

mu = 2.5/g = 2.5/10 = 0.25

1. 👍 0
2. 👎 0

## Similar Questions

1. ### physics/calculus

A stone is thrown straight up from the edge of a roof, 600 feet above the ground, at a speed of 12 feet per second. A. Remembering that the acceleration due to gravity is -32 feet per second squared, how high is the stone 6

asked by kloe on February 7, 2017
2. ### physics

A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 12.6 m/s. The cliff is 49.1 m above a flat horizontal beach as shown in the figure. a.How long after being released does the

asked by Help plz on January 24, 2016
3. ### physics

a stone is thrown in such a manner that it would just hit a bird at the top of a tree and afterwards reach a maximum height double that of the tree . if at the moment of throwing the stone the bird flies away horizontally with

asked by prabhat on August 7, 2015
4. ### physics

9. A stone is thrown at an angle of 30° above the horizontal from the top edge of a cliff with an initial speed of 19.6 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 6.7 s. How far out

asked by sam on June 10, 2010
1. ### physics

A stone is dropped from a 75 m high building. when this stone has dropped 15m, a second stone is thrown downward with an initial velocity such that two stones hit the ground at the same time. find a. time taken for the first stone

asked by elaine on October 19, 2010
2. ### PHYSICS

A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the

asked by BENSON on April 12, 2017
3. ### SCIENCE

A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the

asked by BENSON on April 12, 2017
4. ### Physics

A stone thrown horizontally from the top of a 18-m tower hits the ground at a point 18 m from the base of the tower. (Ignore any effects due to air resistance.) (a) Find the speed at which the stone was thrown. m/s (b) Find the

asked by Anonymous on December 3, 2014
1. ### Physics

Stones are thrown horizontally with the same velocity from the tops of two different buildings. One stone lands twice as far from the base of the building from which it was thrown as does the other stone. Find the ratio of the

asked by Tonya on September 15, 2013
2. ### physic

A girl throws a stone from a bridge. Consider the following ways she might throw the stone. The speed of the stone as it leaves her hand is the same in each case. Case A: Thrown straight up. Case B: Thrown straight down. Case C:

asked by lisa on July 21, 2010
3. ### Physics

From the edge of the rooftop of a building, a boy throws a stone at an angle 24.0° above the horizontal. The stone hits the ground 4.40 s later, 104 m away from the base of the building. (Ignore air resistance.) Find the initial

asked by Max on February 8, 2010
4. ### calculus

A stone is thrown straight down from the edge of a roof, 750 feet above the ground, at a speed of 7 feet per second. A. Remembering that the acceleration due to gravity is -32 feet per second squared, how high is the stone 5

asked by zac on April 26, 2012