Thursday

September 29, 2016
Number of results: 64,832

**Physics**

A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?

*January 23, 2011 by Megan*

**Physics**

A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?

*January 23, 2011 by Megan*

**Algebra**

THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the object was thrown. A ...

*April 19, 2010 by Joe *

**Algebra**

THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the object was thrown. A ...

*April 19, 2010 by Joe *

**physics please help**

A soccer ball is kicked from the top of a 256 -foot building with an initial velocity of 6 ft/s. How far from the base of the building will the ball land?

*October 19, 2008 by carissa*

**Physical Science**

Four balls are taken to the top of a building. Ball 1 is dropped (zero initial velocity). Ball 2 is thrown straight up with a velocity of 3 m/s. Ball 3 is thrown straight out with a horizontal velocity of 3 m/s. Ball 4 is thrown straight down with a velocity of 3 m/s. Which ...

*April 28, 2013 by ayana*

**physics**

A golfer hits a ball from the origin with an initial speed of 35 m/s at an angle of 44 degrees above the horizontal axis. The ball is moving down when it lands on a green that is 3.00 m above the level where it was struck. Neglect air resistance. 1. How long is the ball in the...

*May 25, 2011 by Amy*

**physics**

A person on a 50-meter tall building throws a ball straight up into the air. This ball has an initial velocity of 20 m/s. From this: 1) Find the time it would take to reach the Max Height 2) Find the actual Max Height (In Meters) 3) Find the time it takes to return to the ...

*September 16, 2009 by Miguela*

**physics**

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...

*July 7, 2010 by Ricky*

**physics**

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...

*July 7, 2010 by Ricky*

**Physics**

You stick your arm over the edge of the Grand Canyon, and throw a ball vertically upwards with a velocity of 15 m/s. Compared to the heighht that you throw the ball, what height is the ball after 6 seconds?

*October 16, 2011 by Tomtom*

**physics**

A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 18 m/s at angle of 35 degrees above the horizontal. The top of the fence is 4 m high. The ball hits ...

*October 19, 2011 by jes*

**Calc B/C**

Assume no air friction and that the acceleration due to gravity is 10 meters/sec^2. A ball is moving horizontally at a rate of 5 meters/sec. until it falls off the edge of a platform. The height, h, of the platform would have to be ___ meters if the ball hit the ground 8 ...

*February 7, 2015 by Anon*

**physics**

A red ball is thrown down with an initial speed of 1.0 m/s from a height of 27.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.5 m/s, from a height of 0.7 meters above the ground. The force of ...

*August 27, 2012 by David*

**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*

**Algebra II**

Help me with this, please... A ball is dropped vertically from a height of 80 meters. After each bounce, the ball reaches a maximum height equal to 60 percent of maximum height of the previous bounce. a. Write the first three terms of the sequence. Explain how you know what ...

*April 10, 2014 by Me and I*

**physics**

A ball is tossed with enough speed straight up so that it is in the air several seconds. Assume upward direction is positive and downward is negative.What is the acceleration of the ball during any of these time intervals? What is the acceleration of the ball at the moment the...

*September 8, 2014 by Mia*

**Math**

A batter hits a baseball straight up into the air. The height of the ball in metres above the ground is given by h(t)=-4.9t^2+23t+2, where t is the number of seconds after the ball is hit. a) What is the average rate of change in the height of the ball over the interval 1.5<...

*February 14, 2014 by Jennifer*

**Physics HELP!!**

A small ball of mass m=0.60 kg hangs from a massless string of length l= 1.2 m. The ball travels in a vertical circle and its speed at the bottom is v0= 6.0 m/s (see figure). Neglect all friction and air drag, and use g=10 m/s2 for the gravitational acceleration. The ball is ...

*November 4, 2013 by Chelsea*

**Physics**

A ball is shot from the top of a building with an initial velocity of 19m/s at an angle theta = 45 above the horizontal. Vxo and Vyo, are 13.4m/s If a nearby building is the same height and 50m away, how far below the top of the building will the ball strike the nearby ...

*October 17, 2012 by Kaan*

**Pre-Calculus**

1) For tax purposes a manufacturer is allowed to depreciate the value of a machine by 10% each year. If the original value of the machine was $10,000, what would be its value for tax purposes at the end of 6 years. (Assume the depreciation is computed at the end of each year...

*November 12, 2015 by Anon*

**Physics**

a 0.2kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 30 m/s and rebounds up at 25 m/s. If the ball is in contact with the sidewalk for 0.025s, what is the magnitude of the average force applied by the sidewalk on the ball?

*October 21, 2012 by Jazmin*

**physics**

a block is held 1.3m above a spring and is dropped.The spring compresses 6cm before sending the ball into the air. How fast is the ball going when it hits the spring? What is the spring constant? How high in the air does the ball go after hitting the spring?

*November 6, 2008 by jeff*

**physics**

metal ball and rubber ball dropped in the 20 ft building in the same time.

*February 7, 2010 by marvin*

**psyhics**

A ball is dropped from the top of a 95 m building. With what speed does the ball hit the ground?

*January 29, 2012 by kyle*

**physics**

a ball is dropped from a tower 122.5meters tall. how long does it take the ball to reach the ground?

*October 5, 2011 by m kay*

**physics(help!!!!!!!!!!!)**

A small ball of mass m=0.60 kg hangs from a massless string of length l=0.9 m. The ball travels in a vertical circle and its speed at the bottom is v0=6.0 m/s (see figure). Neglect all friction and air drag, and use g=10m/s^2 for the gravitational acceleration. The ball is so ...

*November 2, 2013 by Anonymous*

**Science. Check answers**

1. True or False: If the net force of an object is 0 N, the forces are considered unbalanced. (True) 2. Which of the following forces causes a feather to fall slower than a blowing ball? gravity ← rolling friction sliding friction air resistance 3. A small fish in the ...

*October 21, 2013 by Elena*

**physics**

a ball is dropped from the top on an 80-m high building. what speed does the ball have in falling 3.5 s?

*March 30, 2014 by Katie*

**physics**

Each croquet ball in a set has a mass of 0.45 kg. The green ball, traveling at 12.6 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a friction- less surface and all collisions are head-on, find the final speed of the blue ball in each of the ...

*January 5, 2010 by Anonymous*

**physics**

A ball is thrown vertically up from the edge of a 150 m building with a veloicty of 10m/s. (A) how high did the ball rise? (b) how much time did it take fort he ball to reach this height ? (C) what is the velocity oft he ball as it strikest he ground ? (D) how long does it ...

*December 21, 2014 by christoper allen*

**physics**

A cue ball initially moving at 2.6 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball’s ﬁnal speed is 1.3 m/s.Find the cue ball’s angle θ with respect to its original line of motion. Consider this to be an elastic ...

*February 9, 2014 by Anonymous*

**physics**

A ball is thrown vertically upward from the ground with an initial velocity of sixty four feet per second. if the positive direction is up to 't' seconds is the time the has elapse since the ball was thrown and 's' is the distance of the ball from the starting point at 't' ...

*August 19, 2014 by Jhon Paulo*

**Science help! URGENT. Check answers**

1. True or False: If the net force of an object is 0 N, the forces are considered unbalanced. (True) 2. Which of the following forces causes a feather to fall slower than a blowing ball? gravity ← rolling friction sliding friction air resistance 3. A small fish in the ...

*October 21, 2013 by Elena*

**math**

im trying to help my son any help would be great 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...

*January 12, 2010 by joni*

**physics**

A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.

*July 10, 2012 by Dave*

**physics**

A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.

*November 5, 2013 by Andrea*

**physics**

A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.

*November 5, 2013 by Andrea*

**physics**

A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.

*November 5, 2013 by Andrea*

**physics**

A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.

*January 26, 2015 by tms*

**Math Algebra**

Here the missing Infos ;-)). The Physics of Baseball by Robert Adair - after t seconds, starting 1 sec after 35 angle, rotating with an initial backspin of 2000 revolutions per minute, and hit about 110mph is given by H(t)= -80t^2+340t-260 (in feet) a)how many seconds ...

*February 3, 2013 by Kat*

**pysics**

A ball is dropped from the roof of a building. How fast is it moving after 4.5 seconds? (Absolute value)

*January 5, 2013 by meagan*

**Physics**

A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?

*March 14, 2014 by Anonymous*

**Algebra**

A bottle rocket launches into the air. The equation h=-16t^2+64t+9 gives the height of the ball, h in feet, as a function of t, number of seconds after launch. What is the maximum height the ball reaches? How many seconds does it take the ball to reach that height?

*April 8, 2016 by John*

**math-urgent**

A ball with a mass 0.15kg is thrown upward with an initial velocity 20m/s from the roof of a building 30m high. Neglect air resistance. Find the max height above the ground that the ball reaches. Assuming the ball misses the building find the time that it hits the ground

*June 21, 2015 by Anonymous*

**physics**

A ball is thrown horizontally off the edge of a cliff with an initial speed of 20.4 m/s. (a) How long does it take for the ball to fall to the ground 20.3 m below? 1 s (b) How long would it take for the ball to reach the ground if it were dropped from rest off the cliff edge? ...

*February 16, 2012 by Anonymous*

**Physics**

A stone is dropped from the root of a building. A person in the building observes that the stone crosses his window that is 2 meters tall in a time of 0.2 second. How far is the roof from the top of the window?

*June 30, 2016 by Joe*

**Physics**

A hitter hits a baseball into the air. The shortstop, who was initially 33.5 meters away, begins running directly away from home plate at 7 m/s at the moment that the ball was hit and catches the ball, while still running, at the same height from which it was hit, 3.2 seconds ...

*January 17, 2008 by courtney*

**Math M131A**

a rubber ball has the property that on any bounce it returns to 1/3 of the height from which it just fell. Suppose the ball is dropped from 108 ft How far has the ball traveled by the fourth bounce?

*September 24, 2015 by sheila*

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?

*December 9, 2013 by Abigail*

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?

*December 9, 2013 by Abigail*

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?

*December 9, 2013 by Abigail*

**Phizzics....**

A 0.250 kg ball is thrown straight upward with an initial velocity of 38 m/s. If air friction is ignored, calculate the: (a) height of the ball when its speed is 12 m/s (b) height to which the ball rises before falling (c) How would your answers to (a) and (b) change if you ...

*May 10, 2012 by blue ivy*

**Math **

a ball rebounds 1/2 of the height from which it is dropped. The ball is dropped from a height of 136 feet and keeps on bouncing. How far will it traveled when it strikes the ground the third time?

*August 29, 2010 by Karen*

**algebra**

Library Assignment 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...

*January 18, 2010 by hilda*

**queen's science Academy**

A stone is dropped from the top of a tall building and at the same time another stone is thrown vertically upward from the ground level with a velocity of 20m/s the stones meet exectity 2s after their release how tall is the building

*June 14, 2015 by Aisha naabba*

**calculus**

A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give your answer in feet per...

*November 14, 2010 by Ashley*

**physics**

Imagine that you throw a ball vertically upwards from the rooftop of a building. The ball abandons your hand at a point that has the same height as the railway of the rooftop with an ascending speed of 15m/s, been left in free falling. Coming down the ball crosses the railway...

*October 10, 2014 by chantal*

**Physics**

A ball rolls down a hill with a constant acceleration of 2.0 m/s2. If the ball starts from rest, (a) what is its velocity and the end of 4.0 s? (b) How far did the ball move?

*September 26, 2011 by Me*

**Physics**

A ball rolls down a hill with a constant acceleration of 2.0 m/s2. If the ball starts from rest, (a) what is its velocity and the end of 4.0 s? (b) How far did the ball move?

*September 26, 2011 by Me*

**Pre-Calculus**

A ball is thrown vertically upward with an initial velocity of 64 feet per second. The distance(in feet) of the ball from the ground after t seconds is s=64t-16t. At what time will the ball strike the ground? For what time t is the ball more than 28 feet above the ground. The ...

*November 23, 2012 by Cicley*

**Physics**

A solid ball is released from rest and slides down a ramp that makes an angle of 50 degrees with respect to the horizontal. a) What is the minimum coefficient of static friction between the ramp and the ball for no slipping to occur? b) Would this coefficient of static ...

*November 17, 2015 by Zack*

**I need help (Physics)**

A 28 kg ball initially at rest rolls down a 159 m hill. When the ball reaches the bottom it is traveling at 31.3 m/s. How much energy is dissipated by friction on the ball?

*March 14, 2014 by Help please*

**math**

a ball is dropped 128 feet from the roof of a building with each bounce the ball goes up exactly half its previous height. A man is sitting at his desk on the second floor. How many times will he see the ball if his eye level is 15 feet above the ground?

*February 10, 2011 by sammie*

**Physics**

Hypothetically, you are standing on the balcony of an apartment on the 10th level of a building and you throw a ball at some angle,č , above the horizontal away from the building. the ball lands on the ground 10m from the building, 3.2s after it was thrown. the height from ...

*April 26, 2012 by Rodney *

**Calc**

A ball is launched straight up from the edge of a cliff that is 250 m high. The ball's motion is given by s = 35t - 4.9t^2 where s is the ball's height in meters above the cliff top at time t seconds. With what velocity does the ball strike the ground at the base of the cliff...

*February 9, 2016 by Julie*

**physics**

A soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is +30.0m/s. How long is the ball in the air? -What is the maximum height reached by the ball? -What is the horizontal distance traveled by the ball?

*October 31, 2010 by Esora*

**Math, Science**

A woman throws a 0.25 kg ball straight up in the air with a initial speed of 15 meters per second. how far above the woman will the ball go before it starts coming back down?

*April 2, 2015 by Wyatt Bendickson*

**Math**

A ball is thrown straight up from the top of a building 148 ft. tall with an initial velocity of 72 ft per second. The distance s(t) (in feet) of the ball from the ground is given by s(t) = 148 + 72t − 16t2. Find the maximum height attained by the ball.

*July 12, 2015 by Reagan *

**physics**

a ball dropped from a cliff falls with a constant acceleration of 10m/s*s . through how much distance the ball will fall in the 5th second

*August 29, 2009 by sara*

**Calculus**

When a ball is thrown straight down from the top of a tall building, with initial velocity 30 ft/sec, the distance from the release point at time t in seconds is given by s(t)=16t^2+30t. If the release point is 300 ft above ground, what is the velocity of the ball at the time ...

*October 26, 2010 by Leanna*

**science **

A ball having a mass of 0.20 kilograms is placed at a height of 3.25 meters. If it is dropped from this height, what will be the kinetic energy of the ball when it reaches 1.5 meters above the ground?

*February 21, 2013 by kavita *

**Physics Help!!!**

A pitcher throws a 0.111-kg baseball, and it approaches the bat at a speed of 37.4 m/s. The bat does 78.6 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 30.8 m above the point of impact.

*February 26, 2012 by Isaac*

**Physics**

A pitcher throws a 0.107-kg baseball, and it approaches the bat at a speed of 31.7 m/s. The bat does 77.9 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 22.7 m above the point of impact.

*October 9, 2012 by StressedStudent*

**physics**

A pitcher throws a 0.168-kg baseball, and it approaches the bat at a speed of 45.2 m/s. The bat does 86.6 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 22.5 m above the point of impact.

*April 16, 2013 by Anonymous*

**physics**

A pitcher throws a 0.198-kg baseball, and it approaches the bat at a speed of 57.5 m/s. The bat does 85.1 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 32.7 m above the point of impact.

*March 19, 2014 by Anonymous*

**Physics**

A pitcher throws a 0.192-kg baseball, and it approaches the bat at a speed of 43.2 m/s. The bat does 69.8 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 32.6 m above the point of impact.

*April 4, 2014 by Elle*

**Math**

The equation y=-4.9t^2+3.5t+5 describes the height (in meters) of a ball thrown upward at 3.5 meters per second from 5 meters above the ground. In how many seconds will the ball hit the ground? Express your answer as a common fraction. Thank you for your help!

*April 11, 2016 by Lola *

**physics **

a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached by the ball?

*December 16, 2010 by Anonymous*

**physics **

a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached by the ball?

*December 16, 2010 by Anonymous*

**physics **

a soccer ball is kicked into the air at an angle of 38 degrees above the horizontal. The initial velocity of the ball is 30.0m/s. How long was the ball in the air? Determine the horizontal distance traveled by the ball? what is the maximum height reached by the ball?

*December 16, 2010 by Anonymous*

**Physics**

After a 0.200-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate the time the ball is in contact with ...

*March 5, 2014 by Joe*

**Physics**

After a 0.200-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate the time the ball is in contact with ...

*March 7, 2014 by Joe*

**physics**

A ball is thrown horizontally from the roof of a building 33.0 m tall and lands 20.5 m from the base. What was the ball's initial speed?

*September 21, 2010 by Jamie*

**physics**

A ball is thrown horizontally from the roof of a building 59.0 tall and lands 27.4 from the base. What was the ball's initial speed?

*September 21, 2011 by alexis*

**Physics**

A ball is thrown horizontally from the roof of a building 55 m tall and lands 50 m from the base. What was the ball's initial speed?

*October 13, 2011 by Millie*

**Physics**

HELP PLEASE. Hypothetically, you are standing on the balcony of an apartment on the 10th level of a building and you throw a ball at some angle, 0 , above the horizontal away from the building. the ball lands on the ground 10m from the building, 3.2s after it was thrown. the ...

*April 26, 2012 by Melissa*

**Calculus**

A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give your answer in feet ...

*November 14, 2010 by Ashley*

**physics**

a steel ball dropped from a tower strikes the ground in 3.0 seconds. Find the velocity with which the ball strikes the ground and the height of the tower in meters.

*June 20, 2014 by roger*

**Physics **

a 0.2kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 30 m/s and rebounds up at 25 m/s. If the ball is in contact with the sidewalk for 0.025s, what is the magnitude of the average force applied by the sidewalk on the ball? I need steps...

*October 21, 2012 by Jazmin*

**11 Grade College Prep Math-Based Physics**

Not good at physics, so could someone check these practice test questions please? Explanations are appreciated. 1. Which of Newton's Laws says you cannot touch anything without being touched? a) 4th b) 2nd c) 1st d) 3rd *** 2. A 3.00 kg ball is dropped from rest from the roof ...

*October 27, 2015 by Ana*

**Physics**

A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 35.0 m/s. The bat does Wnc = 65.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above the point of impact

*October 24, 2010 by Xavier*

**Physics**

A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 45.0 m/s. The bat does Wnc = 65.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above the point of impact.

*March 14, 2012 by Natasha*

**Physics**

A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 50.0 m/s. The bat does Wnc = 65.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above the point of impact.

*October 15, 2012 by Ben*

**Math**

I don't get either of these equations. Please help me out! 1. Music Mart sells an average of 150 cassette tapes daily at $10.00 a tape. If 15 sales are lost for each $0.50 increase in unit price, what price will maximize profits? What will be the resulting daily profit? 2. S. ...

*October 25, 2007 by Samantha*

**algebra**

im trying to help my son i have no ida about this stuff any help would be great 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 (...

*January 12, 2010 by joni*

**AP Physics**

I have two problems i don't understand if you could solve and show me what you did I would appreciate it :) 1.A 62.0-kg person, running horizontally with a velocity of +3.54 m/s, jumps onto a 13.4-kg sled that is initially at rest. (a) Ignoring the effects of friction during ...

*December 5, 2010 by Deanna*

**Physics- PLEASE HELP**

A 58.0 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with(b) If the ball is in contact with the players head for 19 ms, what is the average acceleration of the ball? a speed of 26.0 m/s. If the player was moving upward with...

*October 17, 2012 by Anonymous*

**Physics- PLEASE HELP**

A 58.0 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with(b) If the ball is in contact with the players head for 19 ms, what is the average acceleration of the ball? a speed of 26.0 m/s. If the player was moving upward with...

*October 17, 2012 by Megan*

**science**

A boy standing on top a building with a height of 500m throws a ball vertically upwards. The balls take 40s to reach to the ground. Neglecting the height of the boy throwing the ball, determine the velocity of the ball.

*December 23, 2012 by Pankaj kumar suman*