Tuesday

October 21, 2014

October 21, 2014

Number of results: 29,122

**MATH**

BENNY PLAYS TWO SPORTS. HE PLAYS SOCCER FOR 3/4 OF THE TIME AND PLAYS BASEBALL FOR 30-MINUTES. HOW MANY MORE MINUTES DOES HE PLAY SOCCER THAN BASEBALL? My answer is he plays soccer 7 minutes more. Am I correct. How do I make a diagram for this problem. Thanks
*October 9, 2012 by MARTHA*

**Physics**

An attacker at the base of a castle wall 3.82 m high throws a rock straight up with speed 7.10 m/s from a height of 1.45 m above the ground. (a) Will the rock reach the top of the wall? __yes __no (b) If so, what is its speed at the top? If not, what initial speed must it have...
*September 8, 2012 by Emily*

**Physics based Calculus**

Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape. Bob is a pitcher, and knows that the fastest he can ...
*September 27, 2012 by Brianna*

**SPORTS PHYSICS**

How does friction, velocity, and acceleration apply to volleyball? -thanks a lot if u help! <3AMBER Think of what happens when your hand comes in contact with the ball. Why doesn't your hand just slip off the ball? Consider changes of direction and speed of the ball. Think ...
*April 16, 2007 by AMBER*

**physics**

A student drops a ball from the top of a tall building; the ball takes 2.4 to reach the ground. What was the ball’s speed just before hitting the ground? (this is excluding everything like air resistance, etc)
*September 3, 2010 by Brittany*

**physics**

You throw a ball straight up in the air. The instant after leaving your hand the ball’s speed is 30 m/s. Ignoring the effects of air resistance, predict how fast the ball is traveling 2 seconds later? Where is it at this time?
*April 10, 2011 by john*

**Physics class**

When throwing a ball, a pitcher exerts a torque of 150 N m for 0.15 seconds onto their arm before letting go of the ball. With an arm length of 0.9 m with inertia 0.6 kg m2, what is the speed of the ball just after it is released?
*April 11, 2011 by M.*

**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 ball is thrown horizontally from the roof of a building 9.0 m tall and lands 8.5 m from the base. What was the ball's intial speed? I have no idea how to do this problemm or what formulas to use because of the fact that I do not know the time interval it took to fall. Sense ...
*July 5, 2009 by Physics*

**physics**

a ball is thrown straight up with a speed of 8.0 m/s from a third-floor window located 13.0 m above ground. Calculate the maximum height, measured from the ground, of the ball; calculate the ball's velocity when it reaches the ground, and calculate the total time it takes the ...
*October 13, 2014 by Arleen *

**physics**

A ball is project from the building of height 250m, at angle 45degree below the horizontal with a speed of 25m/s. i) how long does the ball remain in the air? ii) find the magnitude and direction of the velocity of the ball just before it strikes the ground. (g=9.81m/s2)
*October 19, 2010 by sam*

**Algebra **

If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) a ball is thrown upward with initial velocity of 96 ft/sec...
*April 27, 2012 by Billy*

**Algebra 2**

If an object is thrown vertically upward with an initial velocity of v, from an original position of s, the height h at any time t is given by: h=-16t^2+vt+s(where h and s are in ft, t is in seconds and v is in ft/sec) a ball is thrown upward with initial velocity of 96 ft/sec...
*April 28, 2012 by Billy*

**physics**

suppose a ball thrown downward with initial velocity 3 m/s instead of being dropped a)what then would be its position after 1s and 2s ? b)what would its speed be after 1 s and 2 s ?
*November 19, 2011 by nour*

**Physics**

1. A stroboscopic photo of a club hitting a golf ball, such as the photo shown in Figure 6.3, was made by Harold Edgerton in 1933. The ball was initially at rest, and the club was shown to be in contact with the club for about 0.0022 s. Also, the ball was found to end up with ...
*November 6, 2010 by justin*

**physics**

Amy threw a ball of mass m=0.79 kg horizontally with an initial velocity v=33.4 m/s from a height h=1.9 m. What is the kinetic energy of the ball just before it touches the ground? Express your answer in Joules and use 10 m/s2 for g.
*September 16, 2011 by hannah*

**physics**

When a man throws a ball vertically up his watch fall down from his hand.if the initial speep of the ball is 20m/s from a building.what will be its velocity when it reaches the ground if the height difference b/n them is 100m?
*April 2, 2012 by minas*

**Pre-calculus**

Jana hit a golf ball with an initial velocity of 102 feet per second at an angle of 67° with the horizontal. After 2 seconds, how far has the ball traveled horizontally?
*February 19, 2013 by Becca*

**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*

**phys**

Imagine a motorcycle rider moving with a speed 0.7c past a stationary observer. If the rider tosses a ball in the forward direction with a speed of 0.6c, relative to himself, what is the speed of the ball as seen by the stationary observer? Ans in units of c. The addition of ...
*October 12, 2006 by slien*

**physics**

A projectile is fired through the air. It is launched from the ground, and travels without interference from wind or air resistance, landing on a raised platform above the field. Compare the following values: 1-Initial speed vs. final speed: 2-Initial vertical velocity vs. ...
*June 23, 2013 by Din123*

**physics**

A 8.5 kg steel ball, travelling left to right at 12 m/s, undergoes an elastic collision with a 5 kg steel ball at rest. To the nearest Joule, what is the Total Kinetic Energy of the two balls after collision? ------- If the first ball in the question above has a mass of 10 kg ...
*August 15, 2010 by Skyler*

**physics**

Use the following information to calculate the speed of a ball in a pinball machine at a specific location. The ball is launched by using a spring (k = 684 N/m) compressed by 7.8 cm. Consider the starting position of the ball to be its location when the spring is compressed. ...
*March 10, 2014 by sunny*

**Physics**

Use the following information to calculate the speed of a ball in a pinball machine at a specific location. The ball is launched by using a spring (k = 703 N/m) compressed by 9.0 cm. Consider the starting position of the ball to be its location when the spring is compressed. ...
*March 12, 2014 by Monica*

**science**

the neuron that transmit the signal to your foot to kick a soccer ball are called reflexes motor neurons sensory neurons interneurons
*September 24, 2014 by noah*

**science**

the neuron that transmit the signal to your foot to kick a soccer ball are called reflexes motor neurons sensory neurons interneurons
*September 24, 2014 by noah*

**Physics**

Ok, so this probem is kinda complicated, so ask me if you need clarification. This problem deals with Impulse and Momentum. There are two balls hanging vertically from a horizontal plane. Ball A is pulled back and is set up to strike ball B. Given for ball A - mass = 1.5 kg. ...
*November 29, 2006 by Jared*

**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*

**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 - Spring Gun**

A toy gun uses a spring to shoot a ball with a mass of 5.0 g. The spring is “loaded” by compressing it 5.0 cm and has a spring constant of 288 N/m. The end of the spring is at the end of the gun (the ball does not travel any distance inside the gun after the spring) and the ...
*October 13, 2014 by Sam*

**Physics**

A 0.140-kg baseball is pitched horizontally at 36.7 m/s. When a player hits the ball, it moves at the same speed, but in the opposite direction. If the bat and the ball are in contact for 0.450 ms, calculate the average force the bat exerts on the ball.
*December 9, 2011 by HELP*

**Math**

In a volleyball a player on one team spikes the ball over the net when the ball is 10 ft above court. The spike drives the ball downward with initial vertical velocity of -55 feet per second. Players on the opposing team must hit the ball back over the net before it touches ...
*November 18, 2011 by Lynn*

**Physics **

A cannon launches a ball with the initial speed of 210 m/s at a 70 degree angle. 1. How high will the cannonball go? 2. If the cannonball has a mass of 25kg how much work does it take to launch the cannonball to that height?
*April 11, 2014 by Michelle*

**Physics**

A toy gun uses a spring to shoot a ball with a mass of 5.0 g. The spring is “loaded” by compressing it 5.0 cm and has a spring constant of 288 N/m. The end of the spring is at the end of the gun (the ball does not travel any distance inside the gun after the spring) and the ...
*October 10, 2014 by John*

**Physics Please Help!**

1. How much work is required to stop an electron (m = 9.11 10^-31 kg) which is moving with a speed of 1.97 10^6 m/s? 2. An automobile is traveling along a highway at 91 km/h. If it travels instead at 100 km/h, what is the percent increase in the automobile's kinetic energy? 3...
*February 15, 2011 by Anonymous*

**physic**

golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.5 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 60¡ă above the horizontal. When the ball lands, it ...
*October 24, 2010 by kya*

**Math**

A batsman hits a cricket ball 'off his toes' towards a fieldsman who is 65 m away. The ball reaches a maximum height of 4.9 m and the horizontal compoenent of its velocity is 28 m/s. Find the constant speed with which the fieldsman must run forward, starting at the instant the...
*July 14, 2012 by Candice*

**math**

A batsman hits a cricket ball 'off his toes' towards a fieldsman who is 65 m away. The ball reaches a maximum height of 4.9 m and the horizontal compoenent of its velocity is 28 m/s. Find the constant speed with which the fieldsman must run forward, starting at the instant ...
*July 15, 2012 by candice*

**Physics**

A cue ball traveling at 4.0 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30° with its original direction of travel. (a) Find the angle between the velocity vectors of ...
*November 7, 2010 by Amy*

**science**

A cue ball traveling at 4.0 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30° with its original direction of travel. (a) Find the angle between the velocity vectors of ...
*November 7, 2010 by Amy*

**Physics HELP HELP**

A cue ball traveling at 4.0 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30° with its original direction of travel. (a) Find the angle between the velocity vectors of ...
*November 8, 2010 by matt*

**Physics**

A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of .210kg. What is the impulse of both balls and ...
*January 10, 2014 by Lisa *

**Physics-check plz**

If a pitcher throws a fast ball with a speed of 35 m/s. The ball has a mass of 220 grams. a) how much work was done in throwing the ball? b) If the catcher catches the ball by moving his mitt 15 cm. backward what force did he exert? a.) Throwing the ball in a positive ...
*June 20, 2014 by Sasha*

**problem solving**

in a soccer tournament there are 22 entries. the tourney is single mathc elimination. that is 2 soccer teams compete at the same time and the loser is elimnated. how many games will be played to deterenmine chanmpioneship?
*September 12, 2011 by MATT *

**physics**

A football on the moon (1/6 earth's gravity) is kicked straight up with an initial velocity of +14.5 m/s. If it starts 2.7 m above the surface, how much time has passed until it is 16.8 m above the surface and on its way down?
*November 20, 2010 by sandhu*

**Physics ~ CONSERVATION OF MOMENTUM~**

1.) A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? 2.) A 3.0 kg ball at 3 m/s and strikes a 1.5 kg ball moving at -2 m/s. After the ...
*February 18, 2013 by Isis*

**physics**

A 1.85 m tall basketball player attempts a goal 9.3 m from a basket (3.05 m high). If he shoots the ball at a 45° angle, at what initial speed must he throw the basketball so that it goes through the hoop without striking the backboard?
*March 14, 2013 by John Miller*

**ap calculus**

The height s of a ball, in feet, thrown with an initial velocity of 112 feet per second from an initial height of 6 feet is given as a function of time t (in seconds) by s(t)=-16t^2+112t+20. 1. What is the maximum height of the ball? 2. At what time does the maximum height ...
*September 18, 2009 by muffy*

**physics**

5) After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance 1.5 meters above the ground, and is moving with a speed of 22.0 m/s when it reaches a maximum height of 9.0 m above the ground. What is the speed of the ball when it leaves Sarah...
*September 10, 2012 by Jake*

**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*

**Math**

A ball stuck in a tree at 14ft. You are 5ft. Wats the initial velocity needed to get the ball out the tree?
*April 13, 2011 by Ariel*

**College Physics**

A ball is thrown upward at a speed v0 at an angle of 53° above the horizontal. It reaches a maximum height of 8.2 m. How high would this ball go if it were thrown straight upward at speed v0?
*September 30, 2011 by Mira*

**physics**

A ball is thrown upward at a speed v0 at an angle of 52.0˚ above the horizontal. It reaches a maximum height of 7.3 m. How high would this ball go if it were thrown straight upward at speed v0?
*February 18, 2012 by Shelby*

**physics**

A ball is thrown upward at a speed v0 at an angle of 52.0˚ above the horizontal. It reaches a maximum height of 7.3 m. How high would this ball go if it were thrown straight upward at speed v0?
*February 19, 2012 by Shelby*

**physics!!**

A ball of mass m strikes a wall that is perpendicular to its path at speed +v and rebounds in the opposite direction with a speed –v. The impulse imparted to the ball by the wall is 1) 2mv 2)mv 3)-mv 4)zero 5)-2mv
*February 21, 2014 by jesse k*

**phsical**

A ball is tossed vertically upward from a height of 2 m with an initial velocity of 10 m/s. Just before the ball hits the ground, its velocity will be what?
*August 12, 2011 by abu*

**physics**

Mary tosses a ball upwards with an initial velocity of 9.0 m/s. What is in meters/second the velocity of the ball 3.7 seconds after she threw it?
*August 25, 2011 by Jean*

**physic**

Fernando tosses a ball upwards with an initial velocity of 12.0 m/s. What is in meters/second the velocity of the ball 4.5 seconds after he threw it?
*August 26, 2011 by Jeon*

**southeast**

A ball is thrown downward with an initial velocity of 11 m/s. Using the approximate value of g = 10 m/s2, what is the velocity of the ball 1.6 seconds after it is released?
*April 18, 2013 by audra*

**physics**

A ball is projected upwards from a platform 8m above the ground,with an initial velocity of 3m/s.How long does it take for the ball to reach the ground.
*March 10, 2014 by pamela*

**Physics**

A 5-kg ball is at rest when it is struck head-on by a 2-kg ball moving along a track at 10 m/s. If the 2-kg ball is at rest after the collision, what is the speed of the 5-kg ball after the collision?
*March 24, 2014 by Amanda*

**physics**

Kimberly threw a ball downwards with an initial velocity of 8.0 m/s. What is in m/s2 the acceleration of the ball 1.3 seconds after she threw it?
*August 26, 2011 by Jeon*

**physics**

A softball pitcher throws a ball by swinging his arm with an angular speed of 9.81 rad/s. If the pitchers arm is 0.640 m long, what is the tangential speed of the ball just before the pitcher releases it?
*February 10, 2012 by Anonymous*

**Physics for engineers**

A bowling ball weighing 71.3 is attached to the ceiling by a rope of length 3.73 . The ball is pulled to one side and released; it then swings back and forth as a pendulum. As the rope swings through the vertical, the speed of the bowling ball is 4.60 . What is the ...
*March 13, 2013 by Matabase*

**Physics**

Two students are on a balcony 19.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. At the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way down. What is the ...
*September 25, 2006 by Becca*

**physics**

A ball is thrown upward at a speed v0 at an angle of 59.0¢ª above the horizontal. It reaches a maximum height of 8.7 m. How high would this ball go if it were thrown straight upward at speed v0?
*October 6, 2011 by randy*

**Physics**

A ball bounces upward from the ground with a speed of 14 m/s and hits a wall with a speed of 12 m/s. How high above the ground does the ball hit the wall? Ignore air resistance.
*January 5, 2012 by Zach*

**physics**

A ball is thrown upward at a speed v0 at an angle of 59.0¢ª above the horizontal. It reaches a maximum height of 7.5 m. How high would this ball go if it were thrown straight upward at speed v0?
*September 20, 2014 by S*

**Physics**

Consider two cases in which the same ball is thrown against a wall with the same initial velocity. In case A, the ball sticks to the wall and does not bounce.In Case B, the ball bounces back with the same speed that it came with. A.)In which of the two cases is the change in ...
*July 7, 2014 by Anonymous*

**Physics**

Consider two cases in which the same ball is thrown against a wall with the same initial velocity. In case A, the ball sticks to the wall and does not bounce.In Case B, the ball bounces back with the same speed that it came with. a.) In which of the two cases is the change in ...
*July 7, 2014 by Anonymous*

**Physics**

Consider two cases in which the same ball is thrown against a wall with the same initial velocity. In case A, the ball sticks to the wall and does not bounce.In Case B, the ball bounces back with the same speed that it came with. a.) In which of the two cases is the change in ...
*July 7, 2014 by Anonymous-HELP! PLEASE!!*

**physics**

A ball is lodged in a hole in the floor near the outside edge of a merry-go-round that is turning at constant speed. Which kinematic variable or variables change with time, assuming that the position is measured from an origin at the center of the merry-go-round? which is the ...
*September 29, 2008 by Anonymous*

**physics**

On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.9 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 42° above the horizontal. When ...
*October 19, 2010 by Anonymous*

**Physics**

A ball is rolled up a ramp from the point B shown below, with an initial speed of 5 miles per hour. It continues up the ramp to point C before it begins to roll back down. Throughout the motion up and down the ramp, the ball maintains a constant acceleration (this is always ...
*October 18, 2013 by Luul*

**Physics**

A uniform solid ball rolls smoothly along a floor, then up a ramp inclined at 13.5 degrees. It momentarily stops when it has rolled 1.65 m along the ramp. What was its initial speed?
*November 17, 2013 by Kelsey*

**math**

ball thrown up from top of 96 foot high tower with initial velocity of 80 ft/s. when does ball reach max height and how high is it at that time?
*October 10, 2011 by BK*

**phy**

A baseball is thrown horizontally from the top of a cliff 50 meters up. The initial velocity of the ball is 10 m/s. How far from the base of the cliff will the ball land?
*March 5, 2014 by Anonymous*

**physics**

A 45.5-g Super Ball traveling at 29.0 m/s bounces off a brick wall and rebounds at 19.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.15 ms, what is the magnitude of the average acceleration of the ball during this time interval?
*February 1, 2012 by Anonymous*

**physics**

A 47.0-g Super Ball traveling at 26.5 m/s bounces off a brick wall and rebounds at 20.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.10 ms, what is the magnitude of the average acceleration of the ball during this time interval?
*January 25, 2013 by tori*

**Physics**

A ball is fastened to one en of a 28 cm string, and the other end is held fixed to a support. The ball whirls in a horizontal circle. Find the speed of the ball in its circular path if the string makes an angle of 35 degrees to the vertical.
*May 16, 2013 by Andrea*

**Physics**

A 47.0-g Super Ball traveling at 29.5 m/s bounces off a brick wall and rebounds at 15.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 5.00 ms, what is the magnitude of the average acceleration of the ball during this time interval?
*September 14, 2014 by Rin*

**Physics**

A 47.0-g Super Ball traveling at 29.5 m/s bounces off a brick wall and rebounds at 15.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 5.00 ms, what is the magnitude of the average acceleration of the ball during this time interval?
*September 14, 2014 by Anonymous*

**Math: Word Problem**

A ball is thrown upward from the top of a building which is 96ft tall w/ Initial velocity of 80 ft per sec. Distance s(ft) of ball from the ground after t sec is s=96+80t-16t^(2) 1) how many sec. will the ball pass the top of the building when it is coming down? How would I ...
*September 7, 2010 by Amy~*

**spelling**

I need to write about soccer. I'm not a soccer playerand I do not know anything about it. Could you give me a couple topics for paragraphs. Thanks.
*January 29, 2009 by Anya*

**Physics**

A girl riding a bicycle at 2.16 m/s throws a tennis ball horizontally forward at a speed of 1.38 m/s relative to herself. The tennis ball lands 1.84 m horizontally from the point at which the girl released the ball. How high above the ground was the ball released?
*November 13, 2012 by Asia*

**phsyics**

A baseball is thrown straight up. The drag force is proportional to v^2. In terms of g, what is the y-component of the ball's acceleration when its speed is half its terminal speed and it is moving up? In terms of g, what is the y-component of the ball's acceleration when its ...
*September 23, 2010 by jane*

**Physics**

Bill throws a tennis ball vertically upward such that it leaves his hand with a speed of 12 m/s. Bill catches the ball at the same height from which he released it. Assume that air resistance is negligible, so the tennis ball can be considered to be in free-fall, with an ...
*September 12, 2014 by Danielle*

**Physics**

A coin is tossed into the air with an initial speed of 8.00 m/s. In the absence of air resistance, how high does the coin go above its point of release It rises a distance h such that the potential energy gain (m g h) equals the initial kinetic energy loss ((1/2) m v^2 ). ...
*January 4, 2007 by Anonymous*

**physics**

A ball is rolling on a table and leaves the end side of the table with a velocity of 1.5 m/s. The table is 0.70 m high and the ball has a mass of 0.850 kg. What's the speed of the ball when it hits the ground? What equation should I use?
*October 12, 2014 by Richard*

**Math**

A football is kicked with an initial velocity of 42 ft/sec at an angle of 35 degrees with the horizontal. How far has the football traveled horizontally after 0.5 sec? round to nearest tenth. Could someone explain this please?
*October 6, 2008 by House*

**Physics**

Velocity/instantaneous velocity question? In a demonstration a ball falls directly to the ground. Which of the following statements about this event is not correct? (Assume downward is the positive direction.) a)The average velocity during the first half of the fall is greater...
*October 7, 2012 by Lewis*

**Physics**

A golfer hits a golf ball at an angle of 35° above horizontal. If the initial velocity is 55 m/s, how long does the ball soar before it hits the ground?
*December 1, 2010 by Elaina*

**physics**

the force acts on a 50g ball varies with time.if the initial velocity of the particles is 20m/s.what is the average acceleration of ball during this time?
*January 8, 2012 by jumana*

**physics**

the force acts on a 50g ball varies with time.if the initial velocity of the particles is 20m/s.what is the average acceleration of ball during this time?
*January 8, 2012 by jumana*

**physics**

the force acts on a 50g ball varies with time.if the initial velocity of the particles is 20m/s.what is the average acceleration of ball during this time?
*January 8, 2012 by jumana*

**physics **

You throw a ball vertically from an apartment balcony to the ground 14.2 m below. Find the ball's initial velocity if it hits the ground 1.08 s after you release it.
*September 30, 2013 by squad*

**Physics - stuck**

Car A has an initial speed of 15m/s and is gaining speed at 1.5m/s^2. Car B has an initial speed of 20m/s and is gaining speed at 2.0m/s^2. The initial distance between them is 168m. Find when and where the cars will pass one another and their speeds as they are passing. ...
*February 18, 2008 by Anonymous*

**physics**

You stand at the edge of a cliff, holding a ball out over the edge. You give the ball an initial velocity of 7.00 m/s straight up, releasing the ball when it is 17.0 m above ground level (the level of the ground at the base of the cliff). Use g = 10.0 m/s2, and neglect air ...
*September 15, 2014 by Hannah*

**physics**

problem says that a cannon ball is fired at a 30 degree angle off a 10 meter high wall at 80 m/s. Use work and energy to find it's impact speed. I worked out this out with the equation: (1/2)(mass)(initial velocity)^2 + mgy = (1/2)(mass) (final velocity)^2 + mg(y final) i got ...
*November 9, 2010 by Taylor*

Pages: <<Prev | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | **15** | 16 | 17 | 18 | 19 | 20 | 21 | Next>>