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May 19, 2013

Search: math (speed)

Number of results: 204,585

applied math - more info
which speed? rotation speed, orbital speed, speed of a falling body?
Tuesday, March 13, 2012 at 3:55am by Anonymous

college math
v = boat speed speed downstream = (v + 6) speed upstream = (v-6) time = distance/speed 160/(v+6) = 96/(v-6) 10/(v+6) = 6/(v-6) 5/(v+6) = 3/(v-6) 3(v+6) = 5(v-6) 3 v + 18 = 5 v - 30 2 v = 48 v = 24 mph
Friday, March 9, 2012 at 4:57pm by Damon

Math
Their speed downstream = 21/3 = 7mph Their speed upstream = 21/7 = 3mph So, the river speed is (7-3)/2 = 2mph Their rowing speed is 5mph.
Wednesday, October 26, 2011 at 9:52pm by Steve

math
That depends upon the speed of the car it hits. The relative impact speed in a rear-end collision (or "rate" as you call it) is the speed of the car behind MINUS the speed of the car in front.
Monday, October 22, 2007 at 2:21pm by drwls

Math
His initial speed was 68mph. Using Distance = Rate * Time, we get: Let r = speed for 6 hours, r-20 = speed for 5 hours, so: 648 = 6r + 5*(r - 20). Hope this wasn't in Wi because the max legal speed limit is 65mph!
Wednesday, March 27, 2013 at 11:56pm by Wayne

math 116
The downstream speed with respect to land is V+6 and the upstream speed is V-6, where V is the speed in still water. Let the distance be D D/(V+6) = 4 hrs D/(V-6) = 5 4(V+6) = 5(V-6) V = 54 mph
Tuesday, March 3, 2009 at 7:56pm by drwls

math
Application Giovanni is flying his Cessna airplane on a heading as shown. His instrument panel shows an air speed of 130 mi/h. (Air speed is the speed in still air without wind.) However, there is a 20 mi/h crosswind. What is the resulting speed of the plane?
Saturday, March 9, 2013 at 5:21am by y

math
Application Giovanni is flying his Cessna airplane on a heading as shown. His instrument panel shows an air speed of 130 mi/h. (Air speed is the speed in still air without wind.) However, there is a 20 mi/h crosswind. What is the resulting speed of the plane?
Friday, March 8, 2013 at 6:05pm by x

Math
Speed = distance / time 20 minutes = 20/60 = 1/3 hr Speed = 40 miles / (1/3) hr Speed = 120 mp/h Hence, his average speed returned home is 120 mile per hour.
Monday, July 25, 2011 at 12:03am by Mithra

math
recall that speed or rate is distance traveled over time, or: speed, v = d/t thus, you compare Anna's speed and Julia's speed: Anna: v = 20/(1 1/3) Julia: v = 246/(16) *note: first convert mixed number to improper fraction before dividing. hope this helps. :)
Friday, October 29, 2010 at 2:15am by jai

math
let spped of current be X, when the boat goes upstream, the actual speed of boat= speed of boat-speed of current;when the boat goes downstream, the speed =speed of boat+speed of current distance=speed x time upstream: (16-X)x 1/3 downstream:(16+X)x1/4 since the total distance ...
Wednesday, September 3, 2008 at 9:34pm by ZZ

Math
if boat speed = b, and river speed = r, then since speed = distance/time, b+r = 12/1.5 = 8 (downstream) b-r = 12/6 = 2 (upstream) b=5,r=3
Sunday, March 10, 2013 at 10:13pm by Steve

math
w=speed of wind a=speed of airplane Use speed*time = distance (a-w)*(10/3)=960 ...(1) (a+2)*(5/2)=960 ...(2) Solve for a and w.
Wednesday, September 22, 2010 at 9:47pm by MathMate

math
Set-up: Let v=speed of boat c=speed of current Distance = speed*time Upstream: 120=(v-c)*20 ...(1) Downstream: 120=(v+c)*10 ...(2) Solve for v and c.
Wednesday, August 1, 2012 at 6:32pm by MathMate

math
A motorist travelling at a steady speed of 120km/h covers a section of the highway in 30min. After a speed limit is imposed he finds that when travelling at the maximum speed allowed he takes 20 min. longer than before to cover the same section. Calculate the speed limit.
Friday, November 30, 2012 at 12:54am by Lindsay

math
A boat travels 8km upstream and back in 2 hours. If the current flows at a constant speed of 3km/h, Find the speed of the boat in still water.(when the boat goes upstream, it speed reduces by 3km/h, and when going downstream, its speed increases by 3 km/h)
Tuesday, January 15, 2013 at 5:48am by zshen

MATH Algebra
The speed of a passenger train is 6 mph faster than the speed of a freight train. The passenger train travels 280 miles in the same time it takes the freight train to travel 250 miles. Find the speed of each train. What is the speed of passenger train? ____mph What is the ...
Friday, August 7, 2009 at 10:16pm by Anonymous

math
The Danville Epress travels 280mi at a certain speed.If the speed had been increased by 5mph the trip could have been made in 1 hour less time.Find the actual speed.
Tuesday, February 15, 2011 at 10:31pm by Nicole

Math
The Danville Epress travels 280mi at a certain speed.If the speed had been increased by 5mph the trip could have been made in 1 hour less time.Find the actual speed.
Tuesday, February 15, 2011 at 7:29pm by Nicole

math
The train slows down uniformly from a speed of 50m/s to a speed of 10m/s in a time of 20sec,During the next 30sec,it accelerates uniformly to a speed of u metres/sec.calculate the retardation from t=0 to t=20?
Friday, May 3, 2013 at 10:21am by Meggy lep

Math
angular speed=angle/time convert 220 degrees to radians.. Angle=220/360 ( 2PI) solve for angular speed. linear speed=angular speed* (3959+220)
Sunday, October 21, 2012 at 5:22pm by bobpursley

english
In the following paragraph, are the words I have in capital letters adverbs? A five-speed bike combines the WORST of a three-speed and ten-speed. The typical five-speed is built on the same heavy frame as the three-speed, OFTEN, has the five-speed gear cluster and changer ...
Wednesday, September 17, 2008 at 11:26pm by Tracy

10th grade Academic Math
hi can you help me with this problem please, thank you.----------------- If the speed of an experimental car is decreased by 8km/h it completes a 140 km trip in 2 hours more than had it been traveling at its usual speed. Determine its usual speed.
Monday, June 7, 2010 at 7:29pm by Neil

10th grade Academic Math
hi can you help me with this problem please, thank you.----------------- If the speed of an experimental car is decreased by 8km/h it completes a 140 km trip in 2 hours more than had it been traveling at its usual speed. Determine its usual speed.
Monday, June 7, 2010 at 7:19pm by Neil

10th grade Academic Math
hi can you help me with this problem please, thank you.----------------- If the speed of an experimental car is decreased by 8km/h it completes a 140 km trip in 2 hours more than had it been traveling at its usual speed. Determine its usual speed.
Monday, June 7, 2010 at 6:41pm by Neil

physics
A runner, beginning at rest, completed a 50 m run with a final speed of 6 m/s. Assuming constant acceleration. a) What was the average speed of the runner? b) What was the runner's time? c) What was the acceleration? a) half the final speed b) distance/(average speed) c) (...
Monday, October 2, 2006 at 11:04pm by maria

Math
An aircraft flew 3hrs with the wind. The return trip took 4hrs against the wind. If the speed of the plane in still air is 180mph more than the speed of the wind, find the wind speed and the speed of the plane in still air.
Tuesday, September 27, 2011 at 11:34pm by Ingrid

Math
Let x = speed of A and x + 80 = speed of B. Speed = distance/time. therefore Distance = speed * time Distance traveled by A + distance traveled by B = 3200 This should help you solve your problem. Thanks for asking.
Tuesday, October 16, 2007 at 8:47pm by PsyDAG

Calculus(Pre)
linear speed is speed along a given path, normally a straight line. angular speed is some changing angle that changes as a function of time. The change in angle per unit time is angular speed. For instance, if a car wheel makes a complete rotation in 10 seconds, its angular ...
Thursday, November 17, 2011 at 4:43pm by bobpursley

physics
average speed = 400/20 = 20 m/s^2 constant acceleration (v = a t + starting speed) so begin speed is 0 and end speed is 40 m/s
Friday, July 6, 2012 at 2:19am by Damon

algebra
Assume the speed for the first trip is v and the speed for the second trip is (v - 5) Since time = distance/speed, you get: (70)/(v) + (7)/(v - 5) = 5 hrs. Solve for v to get the first speed, then subtract 5 to get the second speed.
Friday, July 6, 2012 at 8:36am by Anonymous

math
A cyclist bikes at a constant speed for 18 miles. He then returns home at the same speed but takes a different route. His return trip takes one hour longer and is 23 miles. Find his speed.
Monday, July 23, 2012 at 12:00am by john

math
speed of boat in still water ---- x km/h speed of current ----- 2 km/h speed against current = x-2 speed with the current = x+2 time upriver = 12/(x-2) time downriver = 12/(x+2) equation: 12/(x-2) + 12/(x+2) = 2.5 hint: multiply both sides by (x+2)(x-2), simplify and you have ...
Friday, October 15, 2010 at 11:21pm by Reiny

physics
An object moving with constant acceleration at time t=0 its speed is v. , at t=t. its speed is v./2 , at t=2t. its speed is v./4 . What will be its speed at time t=3t.?
Tuesday, July 26, 2011 at 11:21am by Tillu

physics
speed = a t starting from rest speed = 360 * .05 u = speed * cos 46 v = speed * sin 46
Sunday, September 5, 2010 at 6:25pm by Damon

MATH
1. speed of boat in still water --- x mph speed of current ---- y mph 10(x+y) = 210 ----> x+y = 21 70(x-y) = 210 ----> x-y = 3 add them 2x = 24 x=12 then y = 9 speed of boat = 12mph , speed of current = 9 mph #2 even easier .... define x and y as above x+y = 158 ...
Monday, August 27, 2012 at 8:40am by Reiny

Math Ms. Sue please help
speed of plane in still air --- x mph speed of wind ------------ y mph so going with the wind, speed = x+y against the wind, speed = x-y x+y = 158 x-y = 112 add them 2x = 270 x = 135 then 135 + y = 158 y = 23 speed of wind is 23 mph, speed of plane in still air = 135 mph
Thursday, February 28, 2013 at 9:11pm by Reiny

math - incomplete
speed increases at a rate of 1.2m/s/? If the speed increases, the value (m/s) increases by 1.2m.s every how often? acceleration is not measured as m/s. It looks to me like you should have written the acceleration is 1.2m/s^2, and you want to find how long it takes the speed to...
Saturday, August 4, 2012 at 4:09am by Steve

MATH
Well, obviously the speed of the plane must be greater than the speed of the wind, so in x-y = 112 x must be the plane's speed and y the wind's speed so sub y = 23 into x+y = 158 x+23=158 x = 155
Monday, August 27, 2012 at 8:40am by Reiny

algebra
the speed of train A is 8 mph slower than the speed of train B. Train A travels 220 miles in the same time it takes train B to travel 260 miles. Find the speed of both trains. Speed of train A = Speed of train B =
Monday, November 12, 2012 at 8:44pm by pam

Physics
speed*cos23*timeinair=8.4 speed= you solve it in terms of t. then vertical equation: hf=hi-4.9t^2+speed*sin23*t put what you solved for speed above into this equation, then solve for timeinair. then solve for speed.
Wednesday, September 26, 2012 at 4:43pm by bobpursley

math
let speed of boat in still water be x mph upstream: speed = x-5 time = 36/(x-5) downstream: speed = x+5 time = 54/(x+5) the two times are equal, so 36/(x-5) = 54(x+5) 54x - 270 = 36x + 180 18x = 450 x = 25 The speed of the boat without a current is 25 mph
Tuesday, August 2, 2011 at 8:51pm by Reiny

Math
I come up with 8. Toyota: 2 options: 5-speed or automatic (both with no trunk) Mazda: 2 options: 5-speed w/trunk loaded; 5-speed w/trunk empty Honda: 4 options: 5-speed w/trunk loaded 5-speed w/trunk empty automatic w/trunk loaded automatic w/trunk empty I lost you when you ...
Wednesday, May 21, 2008 at 12:00am by drwls

Math
Mattie drove 140 miles in the same amount of time that it took a tubropropeller plane to travel 520 miles. The speed of the plane was 190 mph faster than the speed of the car. Find the speed of the plane
Thursday, March 1, 2012 at 4:39pm by Anonymous

Radians
The angular speed of a large pulley wheel that has a radius of 15, is 50 revolutions/min. Find the angular speed and the rim speed of the smaller wheel that has a radius of 5. The rim speed is going to be the same. I got the angular speed but I can't figure out why the rim...
Tuesday, April 5, 2011 at 9:47pm by Jessica

physics
Wind speed vector + Air speed vector = Ground speed vector Perform the vector subtraction. Wind speed = Ground speed - Air speed North component of wind speed = 200 sin30 -150 sin60 = ? East component of wind speed = 200 cos30 -150 cos60 = ?
Wednesday, December 14, 2011 at 7:37pm by drwls

physics
let L = wavelength, A = amplitude and w = angular frequency max particle velocity = w A wave speed = 2 pi w L ratio (part speed)/(wave speed) = A/(2 pi L) Note that the ratio is independent of wave speed, w and cord tension. It would have been necessary to know these ...
Friday, December 24, 2010 at 10:37am by drwls

algebra
2.) distance = time × speed Let rowing speed in still water be x, current in river be y Downstream, speed is his natural rowing speed plus the current: 24 = 6(x + y) Upstream, speed is natural rowing speed minus current: 18 = 6(x - y) or 4 = x + y 3 = x - y Add 7 = 2 x x...
Wednesday, February 16, 2011 at 8:45pm by Dallas

Physics
When a football in a field goal attemp reaches its max height how does its speed compare to its inital speed? a)it's zero b) it is less than its inital speed c)it is equal to its inital speed d)it is greater than its inital speed since at the max height v=0 isn't the ...
Wednesday, September 26, 2007 at 2:31pm by Tammy

Physics
When a football in a field goal attemp reaches its max height how does its speed compare to its inital speed? a)it's zero b) it is less than its inital speed c)it is equal to its inital speed d)it is greater than its inital speed since at the max height v=0 isn't the ...
Tuesday, September 25, 2007 at 7:54pm by Tammy

repost math question
An aircraft flew 6 hours with the wind. The return trip took 7 hours against the wind. If the speed of the plane in still air is 276 miles per hour more than the speed of the wind, find the wind speed and the speed of the plane in still air. The wind soeed was ______ mph.
Friday, October 22, 2010 at 11:46am by Anonymous

math (speed)
A boat cruises downstream for 2 hours before heading back. It takes 3.5 hours going upstream to get back. If the speed of the stream is 8 mph, what is the speed of the boat in still water?:
Saturday, September 22, 2007 at 1:19am by --

sCiEnCe
Can you define speed, motion, constant speed and average speed? And can you get me there formulas? Ex-Distance over speed THANKS MUCH! <333 Can you define speed, motion, constant speed and average speed? And can you get me there formulas? Ex-Distance over speed THANKS ...
Sunday, March 4, 2007 at 3:57pm by Jonas!

science/math
A car travels up a hill at a constant speed of 45 km/h and returns down the hill at a constant speed of 70 km/h. Calculate the average speed for the round trip.
Saturday, September 24, 2011 at 2:54pm by Jonathan

Math
her speed over groundis 18mph time=distance/speed
Monday, March 7, 2011 at 9:08pm by bobpursley

math
Let x = Julia's speed, then x+9 = Bianca's. Time * Speed = Distance 4(x + x+9) = 140 Solve for x, then x+9.
Monday, January 14, 2013 at 11:12pm by PsyDAG

math
speed of a plane in still air is 450 speed of wind is 150
Saturday, July 31, 2010 at 4:51am by joy

math/physics
speed current/speed boat = tan 27 solve for currentspeed.
Tuesday, September 21, 2010 at 4:21pm by bobpursley

Math
Jimmy is traveling at a speed of 60 mi/h. What is his speed in feet per second?
Saturday, August 15, 2009 at 6:26am by Regina

MATH
Well, obviously the speed of the plane must be greater than the speed of the wind, so in x-y = 112 x must be the plane's speed and y the wind's speed so sub y = 23 into x+y = 158 x+23=158 x = 155 ^that's what you said.. you wrote 155 not me..?
Monday, August 27, 2012 at 8:40am by Kian

followup question
-- For this question, I know how to find the initial speed. If it asks, "What is the speed of the car just before it lands safely on the other side?" how do i calculate that because it's not the same as final velocity right? --------------------------------- you ...
Friday, February 4, 2011 at 4:09pm by Damon

math
Benny is traveling at a speed of 15 mi/h. What is his speed in feet per second?
Saturday, February 16, 2008 at 12:17pm by justin black

math
Jimmy is travelinig at a speed of 135 mi/hr. what is his speed in feet per second?
Monday, January 14, 2008 at 2:22pm by Anonymous

MAth grade 8
mr kumar lives in the eastern part of spore . he visits his aged parents , who lives 36 km away , every weekend he finds that is he increases the average speed of his vehicle by 12km/h, he could save 9 minutes of his travelling time. find the speed at which he travels before ...
Thursday, November 10, 2011 at 8:25am by Aldwin

Physics
The most probable speed is the peak of the speed distribution function. The average is the speed-weighted mean of the speed distribution function. They are not the same thing, mathematically
Thursday, July 19, 2012 at 5:10pm by drwls

math
the speed of a train a is 6 mph slower than the speed of train b. train a travels 220 miles in the same time it takes train b to travel 250 miles. find the speed of each train
Thursday, August 19, 2010 at 9:39pm by summer

math
The speed of a train A is 8mph slower than the speed of train B. Train A travels 230 miles in same time it takes train B to travel 270 miles. Find the speed of each train.
Wednesday, April 21, 2010 at 12:36pm by Karen

physical science
distance = speed * time 3 = v * 6 v = 1/2 meter /second note - that is called the "phase speed" and is the observed speed of a wave crest. It is not the speed of the propogation of the wave system called "group velocity".
Friday, August 19, 2011 at 2:47am by Damon

Math
A small truck is to be driven 300 miles on a freeway at a constant speed of x miles per hour. Speed laws on the freeway require that a truck must be driven between 30 miles per hour and 70 miles per hour. assume that fuel cost $3.50 per gallon. in addition, assume that for a ...
Tuesday, April 24, 2007 at 3:10am by nancy

Math: Calculus - Vectors
If the boat moves directly across then there is enough of the boats speed vector to counteract the river flow. That is 2m/s. So, the vector parallel to the shore (the river flow) speed is 2m/s. The TOTAL speed of the boat is 5m/s. Now solve this for the speed perpendicular to ...
Tuesday, February 19, 2008 at 10:29pm by Quidditch

Physics
speed tangential=2.1/9.7 m/s tangential speed= w*r anglar speed=tangenital speed/radius
Saturday, February 25, 2012 at 8:47am by bobpursley

Math
A wheel has a 32 inch diameter. The speed of a point on its rim is 44 ft/sec. What is its angular speed?
Tuesday, February 26, 2013 at 8:39pm by Sarah

college math
the speed limit on a local highway is 65 miles per hour. what is this speed in km/hr
Tuesday, June 19, 2012 at 9:43pm by Lourane

Math
An alien rocketship is travleing at a speed of 0.024 miles per minute. At this speed, how many inches will it travel in 1 second
Thursday, January 26, 2012 at 7:59pm by Cassidy

math
Let the distance be D and the speed in still water be v. Here is what you know: D = speed * time = 4*(v-1.5) D = (4/3)*(v+1.5) Solve for both unknowns. 4(v-1.5) = (4/3)(v+1.5) (8/3)v = 6 + 2 = 8 v = 3 mph D = (4/3)(4.5) = (4/3)(9/2) = 6 miles
Saturday, July 31, 2010 at 4:46am by drwls

Physics
A ball is thrown horizontally from a height of 16.01 m and hits the ground with a speed that is 5.0 times its initial speed. What was the initial speed? Ok so I got a vertical final velocity of 17.714 m/s. Now I need to find the horizontal speed, correct? Which equation can I ...
Sunday, November 4, 2007 at 11:53am by Lindsay

math
a car travels at a constants speed and uses G(x) litres of gas per kilomotre, where x is the speed of the car in kilomotres oer hour and G(x)=(1280+x^2)/(320x) a>if fuel costs 1.29 per litre, determine the cost function C(x)that expresses the cost of the fuel for a ...
Monday, October 31, 2011 at 10:14pm by invy

Physics
The information provided can yield ground speed 200 km/h, and the speed with respect to the ground, but not air speed. Air speed is affected by wind speed, which is not given. Let V be the actual speed along its climbing path, in earth-frame coordinates. This is probably what ...
Tuesday, July 6, 2010 at 5:46pm by drwls

math
by how many order of magnitute is the speed of light greater than the average speed of grey sound? Rose Diamond when he set the hight gate track 710 m record of for this 47.43 sec in April 2003 710m/47.43s = close to 15 m/s. The speed of light is 3 x 10^8 m/s or 30 x 10^7 m/s...
Monday, October 16, 2006 at 9:56pm by math

Physics
The sun rises in the East. Therefore even if stationary, you are already moving East with the surface of the earth. That Eastward speed is 2 pi*earth radius / (24 hr*3600 seconds/hr) If you launch Eastward, your total speed is the speed relative to earth PLUS the speed of that...
Wednesday, March 19, 2008 at 4:32pm by Damon

physics
If a projectile is launched vertically from the Earth with a speed equal to the escape speed, how far from the Earth's center is it when its speed is 1/9 of the escape speed?
Saturday, April 28, 2012 at 12:35am by Turk

science
vertical speed=g*t=9.8*3 horizontal speed=7m/s speed= sqrt (7^2+29.6^2)
Tuesday, November 3, 2009 at 7:00pm by bobpursley

Physics
how long does it take to fall 60m? h=1/2 g t^2 vf=g t then, for the speed, combine horizontal speed with the vertical speed as vectors.
Wednesday, October 20, 2010 at 7:53pm by bobpursley

Physics
the vertical speed is vf= g *time the horizontal speed is the kicking speed. Vftotal=sqrt (Vh^2+ Vvf^2)
Thursday, January 14, 2010 at 5:48pm by bobpursley

math
a bus takes 12 hours to travel the same distance that an airplane travels in 1.5 hours. the average speed of the airplane ia 120 km per hour faster than five times the average speed of the bus. what is the average speed of the bus? let x represent the speed of the bus speed of...
Wednesday, November 29, 2006 at 2:33pm by aaron

SCIENCE
A police man is driving a car with a speed of 30km/h,and firing a bullet having a speed of 150m/s towards another car which is moving ahead with a speed of 192km/f.At what speed will the bullet hit the car?
Monday, July 16, 2012 at 3:38am by SWAPAN

Physics
at 4s, the speed is 24 + 4g at 5s, the speed is 24 + 5g so the average speed over the interval (for one second) is 24 + 4.5g the distance is the speed times the time
Sunday, September 23, 2012 at 10:58pm by Scott

math
the question is: jim ran a mile in 3 min and 43 seconds how fast was his avrage speed. what was his avg. speed if the time was 353
Friday, April 24, 2009 at 5:58pm by bandit55751

math
His return speed was 5/6 times his speed going there, since he took 6/5 as long coming back. (5/6) x 35 = 29.17 mph
Wednesday, December 31, 2008 at 6:39pm by drwls

math (speed)
Let x = the speed of the boat in still water. Since the same distance is traveled both ways, 2(x + 8) = 3.5(x - 8) Solve for x. I hope this helps. Thanks for asking.
Saturday, September 22, 2007 at 1:19am by PsyDAG

Physics
If a projectile is launched from Earth with a speed equal to the escape speed, how high above the Earth's surface is it when its speed is three-fifths the escape speed? I keep getting the answer 2.56x10^6 m after solving it a few different ways. Help would be great.
Saturday, April 28, 2012 at 6:24pm by Kristin

physics
if a plane is flying at a speed so that the apex half-angle of its shock wave is 30 degrees, what is the speed if the speed of sound is 320 m/s?
Friday, May 13, 2011 at 4:55pm by Cam

physics
The speed of the fish at water is a vector combination of the intial horizontal speed, and the terminal vertical speed. I will be happy to check your work.
Monday, January 10, 2011 at 2:45pm by bobpursley

math 117
A passenger train can travel 325 mi in the same time a freight train takes to travel 200 mi. If the speed of the passenger train is 25 mi/h faster than the speed of the freight train, find the speed of each. Speed = distance/time Therefore time = distance/speed. Assume the ...
Wednesday, July 11, 2007 at 10:21pm by Diana

College math
Highway curves If a circular curve without any banking has a radius of R feet, the speed limitL.in miles per hour for the curve is L=1.5 R. (a.)Find the speed limit for a curve having a radius of 400 feet. (b.) If the radius of a curve doubles, what happens to the speed limit...
Thursday, April 28, 2011 at 3:15pm by Shin

math
ANGULAR SPEED OF A RACE CAR. A race car is driven around a circular track at a constant speed of 180miles per hour. If the diameter of the track is 1/2mile, what is the angular speed of the car? Express your answer in revolutions per hour(which is equivalent to laps per hour) ...
Wednesday, June 13, 2007 at 8:14pm by michelle

physics
a girl of mass 40 kg is skating at a constant speed of 1 m/s. supposed she doubles her speed, how much work will be needed to double her speed?
Monday, January 7, 2013 at 7:06am by merlyn

math
Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly halved.If driver B&#...
Tuesday, February 26, 2013 at 4:09am by angah

physics
The acceleration due to gravity near a planet's surface is known to be 3.20 . Part A If the escape speed from the planet is 9.54 , determine its radius. Part B Find the mass of the planet. Part C If a probe is launched from its surface with a speed twice the escape speed ...
Saturday, September 29, 2012 at 8:01pm by sammy

Math, Please Help!!!
a hot air balloon is rising vertically 10 ft/sec while the wind is blowing horizontally 5ft/sec. Find the speed of the balloon and the angle x that it makes with the horizontal. I know that the speed of the balloon is the square root of (10)^2 + (5)^2, but I was wondering if ...
Thursday, November 10, 2011 at 8:42pm by BOB

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