Saturday

May 23, 2015

May 23, 2015

Number of results: 11,523

**physics**

A 0.23 kg ball of dough is thrown straight up into the air with an initial velocity of 12 m/s.Find the momentum of the ball of dough halfway to its maximum height on the way up.
*March 15, 2012 by Chris*

**kctcs**

the ball thrown the brick wall bounces directly back with the same speed it had when it struck the wall . has the velocity of the ball change explain ?
*February 5, 2013 by sahar *

**PHYSICS Urgent help please**

A red ball is thrown up off the edge of a building 10 m tall with an initial speed of 4 m/s. A) how long does it take for the red ball to strike the ground below? B) If a black ball is dropped off the edge of the same building, how many seconds after the release of the red ...
*November 15, 2012 by Dave*

**Physics**

A football is thrown with an initial upward velocity component of 15.0m/s and a horizontal velocity component of 18.0m/s . How high does it get above the ground? How much time after it is thrown does it take to return to its original height? How far has the football traveled ...
*October 15, 2010 by Sam*

**Physics**

A child tosses a baseball to his siter, who is hanging out the window of an apartment building. The ball's initial velocity is 18 m/s upward. (Ignore any horizontal motion) 1. How long will it take for the ball to reach its maximum height? 2. The sister catches the ball 3.0 ...
*January 28, 2012 by DENISE*

**math**

A soccer ball is kicked upward from the ground and its height (in metres), t seconds after it is kicked, is given by the equation h(t)= -49t^2 + 19t. What wiil be the maximum height attained by the ball? And how much does it take for the ball to hit the ground
*February 24, 2013 by Gabo*

**physics**

A red ball is thrown up off the edge of a building 10 m tall with an initial speed of 4 m/s. A) how long does it take for the red ball to strike the ground below? B) If a black ball is dropped off the edge of the same building, how many seconds after the release of the red ...
*November 14, 2012 by Matt*

**Physics**

Please help me... :( There is a moving bowling ball on the track. A student says, "After the ball is thrown horizontally on the wooden track with horizontal velocity v and zero angular velocity, the translational kinetic energy of the ball remains unchanged before it hits the ...
*April 18, 2010 by Eddy*

**Physics**

A test rocket is launched vertically from ground level (y=0m), at time t=0.0 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 97 m and acquired a velocity of 40 m/s. The rocket continues...
*March 26, 2013 by Renay*

**physics**

A baseball is thrown at an angle of 23◦ relative to the ground at a speed of 22.3 m/s. The ball is caught 36.4649 m from the thrower. The acceleration due to gravity is 9.81 m/s2 . How long is it in the air? How high is the tallest spot in the ball’s path?
*November 26, 2010 by john*

**Physics(Please check)**

A 5-kg ball is thrown straight up in the air with an initial speed of 24m/s. After its release and before it hits the ground when is the ball in free fall? My answer is at all times. Is this correct? Thank you.
*May 16, 2012 by Hannah*

**Physics(Please respond)**

There is a diagram of a ball being thrown in a horizontal diection at 30m/s and there is an angle of 48degrees and a side with 4m. How long is the ball in the air? I am confused because I am not sure of the equation. I know that is is something like y = yo + ? - 1/2gt^2 Thank...
*May 23, 2012 by Hannah*

**physics**

A ball is thrown up onto a roof, landing 4.50 s later at height h = 20.0 m above the release level. The ball's path just before landing is angled at θ = 54.0˚ with the roof. (a) Find the horizontal distance d it travels. What are the (b) magnitude and (c) angle (...
*February 23, 2011 by Bob*

**Physics**

Help imediately please very urgent! A stone is dropped from a cliff 200m high,if a second stone is thrown vertically upwards 1.50sec after the first was released,strike the base of the cliff at the same in stant as the first stone,with what velocity was the second stone thrown?
*January 4, 2013 by Precious*

**Physics **

In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm about the elbow. If the angular velocity of the ball about the elbow joint is 30.0 rad/s and the ball is 1.05 m from the elbow joint, what is the velocity of the ball?
*March 17, 2014 by Sam*

**physics**

A volleyball is deflected vertically by a player in a game housed in a high school gymnasium where the ceiling clearance is 18m. If the initial velocity of the ball is 21.5 m/s, will the ball contact the ceiling?
*September 19, 2010 by stephanie*

**science**

Two stones are launched from the top of a tall building. One stone is thrown in a direction 30.0degree above the horizontal with a speed of 10.0m/s ; the other is thrown in a direction 30.0degree below the horizontal with the same speed. Which stone lands farther away from the...
*September 8, 2008 by bob*

**physics**

When you lift a bowling ball with a force of 60.7 N, the ball accelerates upward with an acceleration a. If you lift with a force of 69.3 N, the ball's acceleration is 1.99a. Calculate the weight of the bowling ball.
*February 15, 2015 by Brad*

**Physics**

a ball thrown horizontally from a point 40m above the ground,strikes the ground after traveling a distance of 9m. with what speed was it thrown? use g=10m/s^2 first i need to find the time so I used y=y_0 +v_0t +1/2at^2 -40=-1/2(10)t^2 t=8s then x=x_o+vt 9=v(8) v=1.125m/s Is ...
*September 26, 2007 by Tammy*

**phisics**

A ball is thrown with a speed of 20 m/sec at an angle of 60 degrees below the horizontal from a bridge whisch is 30 m above the water. Where does the ball hit the water? How long is it in the air?
*December 19, 2010 by Elise*

**physics**

A ball is thrown horizontally off the top of a 67 m tall building at a velocity of 7.3 m/s. How far did the ball land from the base of the building? Round your answer to 2 decimal places.
*December 6, 2010 by byung*

**physics**

A ball is thrown horizontally off the top of a 65 m tall building at a velocity of 7.8 m/s. How far did the ball land from the base of the building? Round your answer to 2 decimal places.
*November 11, 2012 by Sara*

**physics**

A ball is thrown horizontally off the top of a 65 m tall building at a velocity of 7.8 m/s. How far did the ball land from the base of the building? Round your answer to 2 decimal places.
*November 11, 2012 by Sara*

**physics**

A boy standing in a ditch throws a baseball upward toward his father. The ball leaves his hand at ground level, with an initial speed of 15.0 m/s, at an angle of theta = 53.0 degrees from the horizontal. The boy's father reaches up and catches the ball over his head, at a ...
*October 16, 2011 by tab*

**physics **

The fastest recoded pitch in Major league baseball was thrown by nolan ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809m(2.65 ft)by the time it reached home plate, 18.3m (60ft) away. how fast was ryans pitch?
*November 6, 2010 by Casey *

**Physics**

A science student riding on a ﬂatcar of a train moving at a constant speed of a 9.70 m/s throws a ball toward the caboose along a path that the student judges as making an initial angle of 45.0◦ with the horizontal. The teacher, who is standing on the ground ...
*November 29, 2012 by Big Poppa Smurf*

**Physics**

A 5.0-kg box at the top of a 400cm ramp slides down 200 cm. How much gravitational potential energy was lost as the box slides from the top of the ramp to the 200 cm mark of the ramp? A cheerleader is thrown vertically upward into the air. As the cheerleader rises, which one ...
*November 21, 2007 by Alex*

**Physics**

A 0.150kg baseball is thrown upwards with an initial speed of 20.0 m/s. What is the force on the ball when it reaches half its maximum height? (Disregard air resistance.) What is the force on the ball when it reaches its peak? The force on the ball is gravitational weight, ...
*April 9, 2007 by Danielle*

**physics**

anyone else know how to go about solving this complicated problem? Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is traveling at 5.00 m/s when it reaches her. What was the speed of the ball when it left your hand if you ...
*December 20, 2010 by sabeen*

**Physics**

A ball is dropped from 27.0 feet above the ground. Using energy considerations only, what is the velocity of the ball prior to it hitting the ground? If the ball is thrown back up to a ledge 15m above the groud, what would be the velocity as it reaches the ledge?
*February 25, 2012 by Hannah *

**physics-question 7**

A baseball is thrown at an angle of 26 degrees relative to the ground at a speed of 22.1 m/s. The ball is caught 39.2327 m from the thrower. The acceleration due to gravity is 9.81 m/s2 . How high is the tallest spot in the ball’s path? Answer in units of m
*November 1, 2011 by kelly*

**Physics**

A boy standing in a ditch throws a baseball upward toward his father. The ball leaves his hand at ground level, with an initial speed of 16.0 m/s,at an angle of θ = 51°, from the horizontal. The boy's father reaches up and catches the ball over his head, at a height of 2....
*February 6, 2015 by Nelson*

**physics**

a boy standing on the tray of a utility travelling at 5 ms throws aa ball vertically upwads with a velocity of 7.35ms (relative to himself) and catches it again at the same level. what horizontal distance does the ball move while it is in the air
*February 13, 2014 by Anonymous*

**physics**

one of the fastest recorded pitches in major league baseball. thrown by billy wagner in 2003, was clocked at 101.0 mi/h. if a pitch were thrown horizontally with this velocity, how far would the ball fall vetically by the time it reached home plate, 60.5 ft away. Report answer...
*September 26, 2008 by mb*

**physics**

TWO BLOCKS a AND b ARE CONNECTED BY A HEAVY ROPE OF MASS 2kg THE MASSES OF a AND b ARE 10 AND 5kg RESPECTIVELY.IF AN UPWARD FORCE OF 200N IS APPLIED TO THE TOP ROPE,THE SYSTEM IS MOVING VERTICALLY UPWARD UNDER GRAVITY A:FIND THE ACCELERATION OF THE SYSTEM B:WHAT IS THE TENTION...
*January 13, 2012 by Fonde *

**Physics**

How am I doing this problem wrong On a strange, airless planet, a ball is thrown downward from a height of 17 m. The ball initally travels at 15 m/s. If the ball hits the ground in 1 s, what is this planet's gravitational acceleration? by definition of acceleration a = (v - vo...
*October 11, 2009 by Physics*

**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*

**Algebra**

Suppose you hit a fly ball with an initial upward velocity of 20 feet per second. Which of the following equations would be a realistic model for the height of the ball after t seconds?
*July 24, 2014 by Emma*

**Math**

A rubber ball is thrown straight down from a height of 244 feet at speed of 80 feet per second. If the ball always rebounds with one-fourth of its impact speed, what will be the speed of the ball the third time it hits the ground? My Answer is: 1/4*80=60 1/4*60=45 1/4*45=33.75...
*May 6, 2013 by Zach*

**physics**

If a stone is thrown upward at 29.7 m/s, what will be its velocity at a height of 12 meters?
*September 5, 2011 by Anonymous*

**physics**

If a stone is thrown upward at 20.5 m/s, what will be its velocity at a height of 12 meters?
*September 13, 2011 by Anonymous*

**Physics**

A 0.115 kg baseball is thrown upward with an initial speed of 17.0 m/s.
*October 20, 2013 by Anonymous*

**Physics**

A ball is shot from the ground into the air. At a height of 9.1 m, the velocity is observed to be v = (6.6 + 5.7 ) m/s, with horizontal and upward. (a) To what maximum height does the ball rise? m (b) What total horizontal distance does the ball travel? m (c) What is the ...
*February 5, 2013 by Rachel*

**Physics**

Newton's first law of motion states that an object in motion will continue to move at constant speed in a straight line. Only an outside force can change the speed or direction. If the object is at rest, it will remain at rest, unless an outside force is exerted on it. ...
*March 8, 2015 by Marisa*

**Physics**

A ball is thrown toward a cliff of height h with a speed of 27m/s and an angle of 60 degrees above horizontal. It lands on the edge of the cliff 3.0s later. What is the height of the cliff? What is the maximum height of the ball? What is the ball's impact speed? Please provide...
*September 28, 2012 by Nami*

**physics**

A ball is thrown with a horizontal velocity of 2 m/s from a vertical height of 50 m above ground. neglect air resistance and determine: the horizontal displacement traveled by the ball. can someone please explain this to me!
*October 18, 2008 by Karen*

**math**

The height of a ball above the ground t seconds after it is thrown is h(t)= 20 + 32t - 16t^2. How long will it take for the ball to hit the ground? (Round your answer to the nearest hundredth of a second.)
*October 30, 2013 by Clary*

**math**

a ball is thrown down ward from a 320 ft building at a initial velocity of 32 ft per sec. How long would the ball take to reach a height of 48 feet?' 16t^2+32+320
*June 20, 2014 by henry*

**physics**

In the figure, a ball is thrown leftward from the left edge of the roof, at height h above the ground. The ball hits the ground 1.52 s. later, at distance d = 30.5 m from the building and at angle θ = 61° with the horizontal.
*September 21, 2014 by Anonymous*

**Physics**

A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is open and at rest. A small 500-g ball is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side. The ball rebounds with a speed of 16.0 m/s along the ...
*October 26, 2014 by Anonymous*

**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**

An canon ball is launched from ground level directly upward at 39.2 m/s. For how long is the canon ball at or above a height of 34.3 meters?
*February 23, 2014 by Anonymous*

**Science**

You throw a ball upward and then it falls back down. How does the velocity of the ball change as it rises and falls?
*March 29, 2010 by Jenna*

**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*

**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**

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**

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*

**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**

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*

**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*

**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 *

**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 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*

**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 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*

**calculus **

velocity of a ball- if a ball is thrown into the air with a velocity of 40 ft/s, its height (in feet) after t seconds is given by y=40t-16t^2. find the velocity when t=2
*May 16, 2015 by Anonymous*

**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*

**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**

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 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 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*

**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**

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*

**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*

**Calc**

A ball is thrown straight up from the top of a 200 foot building with an initial velocity of 40feet/second. acceleration due to gravity is -32feet/second. a) find a formula for the height of the ball at time t. b) how high does the ball rise before it begins to fall c) when ...
*May 5, 2015 by Jason*

**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 ¦̀ = 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**

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 *

**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*

**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 *