Friday

December 26, 2014

December 26, 2014

Number of results: 10,934

**Mechanics **

A 1-kg ball in the air has an initial velocity vo = [ 20 ] i + [ -30 ] j m/s. It falls for a total time of 1 s. Assume that positive x-values are to the right and positive y-values are upward. A)What is the impulse or change in momentum Delta p of the ball? B)What is the final...
*December 5, 2014 by Jo*

**Physics**

A batted baseball is hit with a velocity of 47.3 m/s, starting from an initial height of 8 m. Find how high the ball travels in two cases: (a) a ball hit directly upward and (b) a ball hit at an angle of 70° with respect to the horizontal. Also find how long the ball stays in ...
*September 12, 2011 by Need Help*

**physics**

two masses are in the ratio 1:2 are thrown vertically up with the same speed . what is the effect on time by the mass?
*September 17, 2012 by sar*

**physics**

A tennis ball with a speed of 6.0 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 4.0 m/s. If the ball is in contact with the wall for 0.012 s, what is the average acceleration of the ball while it ...
*September 7, 2012 by Tamera*

**Physics**

1An object is thrown upward at an initial velocity and caught at the same level as it was thrown. What should the maximum height be if the hang time is 6.4? (please report numerical value to 2 decimal places- unit will not be necessary to report) 2An object is thrown upward at...
*February 8, 2013 by Kirk*

**Physics**

When you lift a ball with a force of 82N, the ball accelerates upward with an acceleration of a. If you lift with a force of 92N, the balls acceleration is 2*a. Find the weight of the ball, and the acceleration a. I know that 82 = ma +mg 92 = m2a + mg That logic is correct ...
*October 18, 2009 by Matt*

**Physics**

I would like logic on how to solve this problem. A styrofoam ball covered with a conducting paint has a mass of 5.0 x 10 ^-3 kg and has a charge of 4.0 microcoulombs. What electric field directed upward will balance the weight of the ball?
*September 11, 2007 by Stephanie*

**Math 10**

Myrtle throws a ball upward from a second-floor balcony, 6 m above the ground with an initial velocity of 2 m/s. In this situation, u = 2 and ho = 6, so the relation that models the height of the ball is h = -5t2 + 2t + 6. Myrtle knows that changing the velocity with which she...
*May 8, 2014 by Kitty *

**physics**

In the problem, please assume the free-fall acceleration g = 9.80 m/s2 unless a more precise value is given in the problem statement. Ignore air resistance. A stone is thrown vertically downward from the roof of a building. It passes a window 15.0 m below the roof with a speed...
*September 4, 2012 by kevin*

**college algebra**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in ft/sec and “k” is the initial height in feet (as if you were on top of...
*January 15, 2010 by Sherry*

**physics**

A tennis ball (m= 0.2 kg) is thrown at a brick wall. It is traveling horizontally at 16 just before hitting the wall and rebounds from the wall at 8 , still traveling horizontally. The ball is in contact with the wall for 0.04 s. What is the magnitude of the average force of ...
*March 11, 2014 by anonymous*

**Algebra**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -10t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in meters/sec and “k” is the initial height in meters (as if you were on ...
*February 19, 2010 by Martha*

**physics**

A mass is dropped from a height of 30m, and at the same time from ground level (and directly beneath the dropped mass), and another mass is thrown straight up with a speed of 15 m/s. a) How far apart are the two masses after 0.5 s? b) Will the massses ever meet or pass each ...
*August 31, 2006 by Sarah*

**physics**

A ball is thrown downwards at 15 degree to and below the horizontal with a velocity of 15m/s from a slope of 10m high. Determine the time taken by the ball to travel in the air and the horrizontal distance it will travel
*May 14, 2011 by Ryan*

**Physics**

a ball is thrown up onto a roof, landing 4.70 s later at height h = 24.0 m above the release level. The ball's path just before landing is angled at = 62.0° with the roof. (a) Find the horizontal distance d it travels. (Hint: One way is to reverse the motion, as if it is on ...
*September 13, 2010 by Antonio*

**physics**

A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.50 m/s at an angle of 24.0° below the horizontal. It strikes the ground 5.00 s later. (a) How far horizontally from the base of the building does the ball strike the ground? ...
*May 16, 2007 by micole*

**Physics**

When you lift a ball with a force of 82N, the ball accelerates upward with an acceleration of a. If you lift with a force of 92N, the balls acceleration is 2a. Find the weight of the ball, and the acceleration a. I tried solving this via substitution algebra, but the answer ...
*October 18, 2009 by Matthew*

**physic**

a footbal is thrown at an angle of 35 reltive to the ground at a speed of 25m/s. the football is then caught 38m from the throwner. you can assume the height that the ball thrown at is the same as the height it was caught. how long was the football in the air ?
*October 22, 2014 by Anonymous*

**physics**

A BODY THROWN UPWARD ALWAYS FALLS ON THE GROUND ,EXPLAIN IT?
*July 11, 2011 by rana*

**science**

How fast must a fall be thrown upward to reach a height of 12 m?
*July 5, 2012 by sara*

**Physics**

A circus performer juggling while standing on a platform 15.0-m high tosses a ball directly upward into the air at a speed of 2.0 m/s. If it leaves his hand 0.5 m above the platform, what is the ball's maximum altitude? If the juggler misses the ball, at what speed will it hit...
*October 6, 2010 by Sammie*

**physics**

A soccer ball is kicked from the ground with an initial speed of 20.4 m/s at an upward angle of 41.0˚. A player 42.2 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before ...
*September 9, 2011 by Alysha *

**physics**

a soccer ball is kicked from the ground with an initial speed of 19.5 meter per second at upward of 45 degrees. a player 55 meter away in the direction of the kick starts running to meet the ball at the instant. what must be his average speed if he is catch the ball just ...
*February 7, 2012 by xai*

**physics**

A soccer ball is kicked from the ground with an initial speed of 18.9 m/s at an upward angle of 47.0˚. A player 54.4 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before ...
*September 23, 2013 by Troy*

**physics**

A soccer ball is kicked from the ground with an initial speed of 20.0 m/s at an upward angle of 43.7˚. A player 50.3 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before ...
*September 25, 2013 by sam*

**physics**

A soccer ball is kicked from the ground with an initial speed of 18.0 m/s at an upward angle of 41.2˚. A player 51.1 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before ...
*October 3, 2013 by shauna*

**physics**

A soccer ball is kicked from the ground with an initial speed of 19.4 m/s at an upward angle of 49.8˚. A player 48.5 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before ...
*October 2, 2014 by Alexa*

**physics**

A major-league pitcher can throw a ball in excess of 36.2 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release? I got -1.08 for the answer but my book is saying its wrong! ...
*September 23, 2012 by Shannon*

**Dynamics**

A quarterback throws a football with a velocity vo at an angle of 45o with the horizontal. At the same instant a receiver standing 20 ft in front starts running down the field at 15 ft/s and catches the ball. What is the distance of the receiver from the quarterback when the ...
*January 30, 2012 by ali*

**Physics**

A juggler performs in a room with a ceiling 2m abouve hand level. A. what is the maximum upward speed she can give the ball without hitting the celing. B. what is the time spent in the air before the ball is caught?
*October 22, 2009 by Anonymous*

**algebra**

When thrown into the air from the top of a 50 ft building, a ball’s height, S, at time t can be found by S(t) = -16t^2 + 32t + 50. When t = 1, s = -16(1)^2 + 32(1) + 50 = 66. This implies that after 1 second, the height of the ball is 66 feet. When t = 2, s = -16(2)^2 + 32(2...
*November 23, 2007 by Patrick*

**physics**

Two stones are thrown vertically up at the same time. The first stone is thrown with an initial velocity of 11.5 m/s from a 12th floor balcony of a building and hits hits the ground after 4.6 seconds. With what initial velocity should the second stone be thrown from a 4th ...
*September 10, 2013 by Logan*

**Physics**

A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. The throw is made with an initial speed of 19.0m/s at an angle of 33.0 ∘ above the horizontal. How long is the ball in the air?
*September 2, 2013 by Roxy*

**Physics**

A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. The throw is made with an initial speed of 19.0m/s at an angle of 33.0 ∘ above the horizontal. How long is the ball in the air?
*September 2, 2013 by Roxy*

**physics**

A ball is thrown horizontally from the roof of a building 47.9 m tall and lands 35.4 m from the base. What was the ball's initial speed in m/s? Hint: Find the horizontal velocity by calculating the time of flight and using the horizontal distance.
*October 10, 2014 by durr*

**Physics**

A 0.26 kg rock is thrown vertically upward from the top of a cliff that is 27 m high. When it hits the ground at the base of the cliff the rock has a speed of 24 m/s. (a) Assuming that air resistance can be ignored, find the initial speed of the rock. (b) Find the greatest ...
*March 29, 2010 by Carden*

**physics**

A body thrown vertically up from the ground passes the height 10.2m twice at an interval of 10 sec. Its initial velocity was (g = 10 m/s2)
*June 13, 2011 by rohit rao*

**physics**

A spherical bowling ball with mass m = 4.1 kg and radius R = 0.116 m is thrown down the lane with an initial speed of v = 8.9 m/s. The coefficient of kinetic friction between the sliding ball and the ground is ¦Ì = 0.34. Once the ball begins to roll without slipping it moves ...
*March 18, 2013 by JOJO*

**Calculus **

A ball is thrown up on the surface of a moon. Its height above the lunar surface (in feet) after t seconds is given by the formula h=308t−(14/6t^2) Find the time that the ball reaches its maximum height. Answer = Find the maximal height attained by the ball Answer =
*October 28, 2014 by Hailey*

**HS Physics**

Please help...I know the direction is up, but I can't figure out the magnitude, except that its label is kg · m/s, I think. A 0.400-kg ball is dropped from rest at a point 1.80 m above the floor. The ball rebounds straight upward to a height of 0.730 m. What are the magnitude ...
*October 15, 2010 by Tzana*

**physics**

A vertical spring with constant 830 N/m has a ball of mass 3 kg attached to the bottom of it, which is held with the spring unstretched. (a) How far must the ball be lowered to reach its equilibrium position? (b) The ball is given a charge of 0.060 C. If an electric field ...
*December 16, 2010 by Jessica*

**Physics**

A winning basketball shot in the last second of a game is launched with an initial speed of 12.2 m/s, 68 degrees above horizontal, and at a height of 2 m above the floor. The ball passes through the basketball hoop mounted at 3.05 m above the floor. A. What is the ball's ...
*March 7, 2012 by Mariah*

**Physics**

Two Balls of masses mA = 45 grams and mB = 65 grams are suspended as follows: both Balls are hanging by a 30 cm string and are vertically parallel to each other. The lighter ball is pulled away to a 66 degree angle with the vertical and is released, hitting the larger mass. a...
*April 9, 2013 by Enzo *

**Algebra**

A football is kicked off the ground at an initial upward velocity of 20 m/sec. (We are using d=rt-5t^2) a. Calculate the altitude after 2.7 sec b. When will the ball be at 17 m above the ground? c. When is the ball at the highest point? d. How high is the ball at its highest ...
*January 10, 2010 by Austin *

**physics**

A cannon ball is shot straight upward with a velocity of 57.50 m/s. How high is the cannon ball above the ground 4.30 seconds after it is fired? (Neglect air resistance.)
*January 17, 2012 by Anonymous*

**physics**

A cannon ball is shot straight upward with a velocity of 72.50 m/s. How high is the cannon ball above the ground 2.30 seconds after it is fired? (Neglect air resistance.)
*September 14, 2012 by Anonymous*

**phys**

Mike throws a ball upward & toward the east at a 20.0 angle with a speed of 51.0 . Nancy drives east past Mike at 15.0 at the instant he releases the ball. What is the ball's initial angle in Nancy's reference frame?
*May 29, 2012 by keren*

**Physics**

A baseball with a mass of 150 g is thrown horizontally with a speed of 39.5 m/s (88 mi/h) at a bat. The ball is in contact with the bat for 1.15 ms and then travels straight back at a speed of 45.0 m/s (101 mi/h). Determine the average force exerted on the ball by the bat. ...
*March 2, 2014 by Elaine*

**Calculus **

1.if a ball is thrown into the air with a velocity of 35ft/s, it's height in feet after t seconds is given by y=35t-10t^2. Find the averag velocity for the time period beginning when t=4 and lasting 0.05s. 2.if a ball is thrown into the air with a velocity of 30ft/s, it's ...
*August 28, 2014 by Jacke *

**Physics(urgent)**

A ball is thrown horizontally from the roof of a building 58.5 m tall and lands 38.7 m from the base. What was the ball's initial speed in m/s? Hint: Find the horizontal velocity by calculating the time of flight and using the horizontal distance.
*October 1, 2009 by Mo*

**Physics**

A ball is thrown straight up from the ground with an initial velocity of 30.4 m/s; at the same instant, a ball is dropped from the roof of a building 21.1 m high. After how long will the balls be at the same height? The acceleration of gravity is 10 m/s2. Answer in units of s
*January 28, 2012 by Kaleigh*

**algebra**

h(t) = -16t2 + 50t + 6, where t is the time in seconds since the ball was thrown. It takes the ball approximately _____ seconds to reach its maximum height. (Round to the nearest tenth of a second and enter only the number.)
*February 4, 2012 by Alicia*

**physics.**

The fastest recorded pitch in the MLB was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would falll .809m (2.65 ft) by the time it reached home plate, 18.3 m away (60 ft). The acceleration of gravity is 9.81 m/s^2. How fast was Ryan's pitch? ...
*October 25, 2010 by Autumn*

**physics**

The fastest recorded pitch in the MLB was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would falll .809m (2.65 ft) by the time it reached home plate, 18.3 m away (60 ft). The acceleration of gravity is 9.81 m/s^2. How fast was Ryan's pitch? ...
*October 25, 2010 by autumn*

**math**

from 4 feet above a swimming pool, susan throws a ball upward witha velocity of 32 feet per second. how long does it take the ball to reach the water?
*March 24, 2011 by kayla*

**physics**

Resultant displacement from 12m east to5m north to9m vertically upward
*August 14, 2011 by gallium*

**PHYSICS 1**

When a pitcher throws a curve ball, the ball is given a fairly rapid spin. A 0.15 kg baseball with a radius of 3.7 cm is thrown with a linear speed of 41 m/s and an angular speed of 37 rad/s. Assume that the ball is a uniform, solid sphere. (b) Calculate how much of its ...
*October 20, 2008 by kelsey*

**11**

A ball is dropped vertically from height of 30 meters after bounces.The ball reaches a max height to 60% of height of the previous bounce. What are the terms of the sequence. What is the height to the nearest tenth of a meter of the ball after the tenth bounces?
*March 18, 2013 by Annie*

**math**

A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. I don't get how to calculate it. Please help. whats the question when ...
*January 18, 2007 by Shay*

**Physics**

Well it's an kinematics project and it involves alot of questions. So here goes the problem: Suppose a football was thrown at an angle of 37 degrees with a velocity of 90mi/hr while leaving a quarterback hand at a height of 6'4" above the ground. A)Calculate the maximum height...
*April 6, 2010 by Vanessa*

**physics**

In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.9 m/s at an angle of 13.8° below the horizontal. It is released 0.65 m above the floor. What horizontal distance does the ball cover before bouncing?
*October 25, 2010 by alex*

**physics**

In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.9 m/s at an angle of 13.8° below the horizontal. It is released 0.65 m above the floor. What horizontal distance does the ball cover before bouncing?
*October 26, 2010 by alex*

**physics**

In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.7 m/s at an angle of 15.4° below the horizontal. It is released 0.83 m above the floor. What horizontal distance does the ball cover before bouncing? m
*September 11, 2011 by !!!!*

**Physics**

I believe this is a projectile motion problem with the angle = 0 degrees. A ball is thrown horizontally from the roof of a building 7.5 m tall and lands 9.5 m from the base. What was the ball's initial speed? How would I start off this problem? Or set it up throughout?
*September 25, 2014 by Lilian*

**physics**

A 0.9 kg hollow ball with a radius of 0.12 m, filled with air, is released from rest at the bottom of a 2.0 m deep pool of water. How high above the water does the ball shoot upward? Neglect all frictional effects, and neglect the ball's motion when it is only partially ...
*December 10, 2006 by Jen*

**Physics - check**

A ball is thrown at a speed of 39.05m/s at an angle of 39.8degrees above the horizontal. Determine: V1perpendicular component: V1Sin(theta) = 25m/s V1paralell component: V1Cos(theta) = 30m/s a) the ball's location 2s after being thrown. V2paralell = V1paralle = 30m/s ...
*March 13, 2008 by Anonymous*

**Physics - check**

A ball is thrown at a speed of 39.05m/s at an angle of 39.8degrees above the horizontal. Determine: V1perpendicular component: V1Sin(theta) = 25m/s V1paralell component: V1Cos(theta) = 30m/s a) the ball's location 2s after being thrown. V2paralell = V1paralle = 30m/s ...
*March 15, 2008 by Anonymous*

**Physics: urgent help needed**

i have a test on monday 1 A beach ball is thrown straight up with a speed of 10m/s from a point 2 m above the ground a) Assuming no air reistance, calculate how far up the ball will go b)At what speed will the ball eventually hit the ground? c) If the air resistance exerts a ...
*April 9, 2011 by deepti*

**Physics**

A 0.15 kg baseball is thrown towards a batter with a velocity of 40 m/s. The batter hits the ball and returns it directly back with a velocity of 60 m/s. What is the change in momentum of the ball?
*November 30, 2009 by Tom*

**physics**

A ball is thrown downward from a window 16.5 m from the ground with a velocity of 3.6 m/s. What is the velocity of the ball the moment it hits the ground? Round your answer to 2 decimal places.
*October 13, 2013 by Anonymous*

**physics**

A ball is thrown downward from a window 16.5 m from the ground with a velocity of 3.6 m/s. What is the velocity of the ball the moment it hits the ground? Round your answer to 2 decimal places.
*October 13, 2013 by Anonymous*

**IB pHYSICS REGENTS**

A ball is thrown straight downward with a speed of 0.50 meter per second from a height of 4.0 meters. What is the speed of the ball 0.70 second after it is released?
*February 11, 2010 by Anonymous*

**physics**

A ball of circumference 71.5 cm and mass 640 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.) (a) Calculate the buoyant force on the ball.
*March 24, 2012 by sara*

**physics**

A ball is thrown horizontally, with a speed of 20 m/s from the top of a 6.2 m tall hill. How far from the point on the ground directly below the launch point does the ball strike the ground?
*October 28, 2010 by Ryan*

**physics**

A ball is thrown horizontally, with a speed of 20 m/s from the top of a 6.2 m tall hill. How far from the point on the ground directly below the launch point does the ball strike the ground?
*October 28, 2010 by Ryan*

**Physics**

Calculate the change in momentum in each of the following situations and state the direction of the change in momentum. a) A 4kg bowling ball strikes a stationary pin head-on at a speed of 3m/s. It continues to move in its original direction, but its speed is reduced to 2m/s. ...
*May 22, 2008 by Alex*

**Physics**

Calculate the change in momentum in each of the following situations and state the direction of the change in momentum. a) A 4kg bowling ball strikes a stationary pin head-on at a speed of 3m/s. It continues to move in its original direction, but its speed is reduced to 2m/s. ...
*May 22, 2008 by Alex*

**physics**

a ball is thrown at an original speed of 8.0 m/s at an angle of 35 degrees above the horizontal. What is the speed of the ball when it returns to the same horizontal level?
*January 26, 2011 by Anonymous*

**Physics**

A ball is dropped from a roof of a building and strikes the ground in 3 seconds. If a second ball is thrown horizontally from the roof, it will hit the ground in:
*September 11, 2014 by Josh*

**Physics**

The graph below represents the velocity of a ball thrown straight up by a strong pitcher as a function of time. In the first part of the graph ending at A, the ball is accelerated to 39.2 m/s in a time of 0.20 s. After the ball leaves the pitcher’s hand, it experiences only ...
*September 22, 2012 by John*

**physical**

Problem 1 A goalkeeper kicks a ball of mass 400 g in the air, and reaches a position of height 15.9 m above the ground corresponding to a horizontal distance 19.7 m from its initial position. During its flight, the ball experiences a horizontal friction force of 3 N from a ...
*December 8, 2011 by sumi*

**physical**

Problem 1 A goalkeeper kicks a ball of mass 400 g in the air, and reaches a position of height 15.9 m above the ground corresponding to a horizontal distance 19.7 m from its initial position. During its flight, the ball experiences a horizontal friction force of 3 N from a ...
*December 8, 2011 by sumi*

**physics**

Two stones are thrown vertically up at the same time. The first stone is thrown with an initial velocity of 11.5 m/s from a 12th-floor balcony of a building and hits the ground after 4.0 s. With what initial velocity should the second stone be thrown from a 4th-floor balcony ...
*October 2, 2011 by Brianna*

**physics**

Two stones are thrown vertically up at the same time. The first stone is thrown with an initial velocity of 12.5 m/s from a 12th-floor balcony of a building and hits the ground after 4.6 s. With what initial velocity should the second stone be thrown from a 4th-floor balcony ...
*October 2, 2011 by Millie*

**physics**

a rock was thrown at the height of 50.0 m above the ground with an initial velocity of 20.0 m/s straight upward.
*October 4, 2011 by hd*

**Physics**

An object is thrown upward with a speed of 21.5 m/s. How high above the projection point is it after 2.06 s?
*May 18, 2012 by James*

**physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.86 m. The stones are thrown with the same speed of 9.78 m/s. Find the location (above the base of the ...
*December 13, 2011 by chris*

**physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 5.97 m. The stones are thrown with the same speed of 8.50 m/s. Find the location (above the base of the ...
*September 5, 2012 by Tracie *

**Physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.82 m. The stones are thrown with the same speed of 9.83 m/s. Find the location (above the base of the ...
*September 30, 2012 by Bryan*

**physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 5.16 m. The stones are thrown with the same speed of 8.67 m/s. Find the location (above the base of the ...
*September 21, 2013 by Jay*

**physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 5.16 m. The stones are thrown with the same speed of 8.67 m/s. Find the location (above the base of the ...
*September 22, 2013 by I need help soon!!*

**Physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.02 m. The stones are thrown with the same speed of 9.20 m/s. Find the location (above the base of the ...
*September 13, 2014 by Brandon *

**physics**

The fastest recorded pitch in Major League Baseball was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809 m (2.65 ft) by the time it reached home plate, 18.3 m (60 ft) away. The acceleration of gravity is 9.81 m/s2 . How fast was ...
*October 20, 2011 by matt*

**Physics**

A 0.5kg ball is thrown over a net and gains 36J of energy. What is the velocity of the ball as it passes over the net?
*September 9, 2012 by Louise*

**Physics**

A ball is shot from the ground into the air. At a height of 0.1m, the velocity is observed to be v=7.7i + 6.4j in meters per second (i horizontal, j upward). What is the direction of the ball's velociry just before it hits the ground?
*September 30, 2007 by Kristen*

**physics**

an .18 kg is placed a compressed spring on the floor. the springs exerts an average force of 2.8N through a distance of .15m as it shoots the ball upward. how high will the ball travel above the release spring?
*March 27, 2011 by Anonymous*

**Math**

The height of a ball t seconds after it is thrown upward from a height of 6 feet and with an initial velocity of 80 feet per second is f (t) = -16t^2 + 80t + 6. According to Rolle's Theorem, what must be the velocity at some time in the interval (2, 3)? ft/sec? & Find that ...
*March 7, 2012 by Angelina*

**Math**

The height of a ball t seconds after it is thrown upward from a height of 6 feet and with an initial velocity of 80 feet per second is f (t) = -16t^2 + 80t + 6. According to Rolle's Theorem, what must be the velocity at some time in the interval (2, 3)? ft/sec? & Find that ...
*March 8, 2012 by Angelina*

**physics**

A ball is thrown horizontally from a 15m -high building with a speed of 8.0m/s. How far away from the base of the building does the ball hit the gnd. I'm needing help setting this up. I know change of Y is -15m, and the "a" is -9.8m/s^2, but i get lost from there...?
*September 26, 2010 by danny *

**Science(applied physics)**

At time t=0,a 1kg ball is thrown up from the top of a tall tower with velocity Vo=18i+24j(m/s). a:calculate the components of th velocity at t=6s. b:Calculate the kinetic energy of the ball at t=6s.
*February 17, 2013 by Bessy*

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