Wednesday

April 23, 2014

April 23, 2014

Number of results: 12,967

**Physics**

An object is thrown vertically upward. a) What are its velocity and acceleration when it reaches its highest altitude? b) What is its acceleration on its way downward half a meter above the ground? My ans: a) velocity is zero and acceleration is 9.8 m/s^2 b) i am not sure but ...
*Saturday, October 17, 2009 at 8:58pm by Nikita*

**Physics**

An object is thrown vertically upward. a) What are its velocity and acceleration when it reaches its highest altitude? b) What is its acceleration on its way downward half a meter above the ground? My ans: a) velocity is zero and acceleration is 9.8 m/s^2 b) i am not sure but ...
*Sunday, October 18, 2009 at 4:01pm by Nikita*

**Physics but algebra problem**

Let a = the acceleration for 89N Let m = the bowling balls mass. Let g = acceleration of gravity. So, 2a is the acceleration for 99N. Set up the equation that shows the 99N acceleration is 2 times the 89N acceleration: 2(89N - mg)/m = (99N - mg)/m Solve for m.
*Wednesday, September 23, 2009 at 6:29pm by Quidditch*

**Physics**

a. Since W=mass x acceleration , when accelerating upward the acceleration due to gravity and the acceleration of the elevator add up. So, a=(9.8+1.7)=11.5m/s^2, so weight = 97kg x 11.5 m/s^2. b. at constant speed their is no acceleration except for earths gravity which means ...
*Monday, February 18, 2008 at 4:46pm by Spencer*

**Cosmology**

In a universe where the scale factor is proportional to t^α, where t is time and α is a constant less than one, the universe has: * the sign of the acceleration is undetermined * negative acceleration * positive acceleration * zero acceleration
*Wednesday, January 16, 2013 at 12:24am by qwerty*

**Physics**

Could you please check my answers and help me out with the last two? Thanxs! 1.Carefully define the following words: distance, displacement, speed, velocity, acceleration. Does it make a difference if we designate distance as "x" or "d"? (I dont understand this question) 2....
*Sunday, September 2, 2007 at 10:54pm by Jules*

**physics**

Two objects moving with constant acceleration starting from rest are to cover the same distance. If the second is to cover that distance in ¼ of the time would need a: a quarter of the first’s acceleration. b: a half of the first’s acceleration. c: sixteen times the first’s ...
*Thursday, December 5, 2013 at 4:00pm by bano*

**physics**

acceleration = net force/mass acceleration = 1/.8(4/5) acceleration = 1.25 m/s^2 hope this helps!!!!
*Monday, October 11, 2010 at 11:36am by Anonymous Awesome Guy*

**Physics**

A Force 5N gives a mass M an acceleration of 8m/s-2 and m an acceleration of 24m/s-2. What is the acceleration if both the masses are tied together?
*Sunday, July 29, 2012 at 2:24am by Anupam Khatiwara*

**Physics**

You have two components of acceleration: a(centripetal) = v^2/r, which is the centripetal acceleration directed inward towards the center of the circle. dtheta/dt = omega = 2*a*t v = omega*r The second component of acceleration is the tangential acceleration, a(tangential) = (...
*Sunday, November 11, 2012 at 5:53am by Jennifer*

**physics**

tension= totalmass*(acceleration+ g) solve for acceleration now, given acceleration, scale reads mg+ma where m is the mass of the woman.
*Wednesday, November 10, 2010 at 9:29pm by bobpursley*

**Physics**

Net Force = Mass * Acceleration Set up a direction convention. Since you already declared +x and -x: Force (+x) + Force (-x) = Mass * Acceleration 30N - 35N = 5kg * Acceleration -5N/5kg = Acceleration -1m/s^2 = Acceleration Now depending on which direction is negative (left or...
*Saturday, January 7, 2012 at 12:49am by Anonymous*

**physics**

A special train is traveling down a long, straight track with a constant acceleration of 9m/s^2 in the forward direction. The train is located on Mars where the acceleration due to gravity is 9 m/s^2. If a passenger drops a ball and measures the acceleration of the ball, the ...
*Sunday, April 6, 2014 at 8:43pm by anonymous*

**Physics**

1.During a tennis serve,the top of the raquet,which is 15m from its pivot point,accelerats from rest to a speed of 10m/s in a time of 0.10s.Calculate the average tangential acceleration and the top of the racquet and also its angular acceleration. Tangential acceleration = ...
*Tuesday, November 14, 2006 at 6:24am by miss sixty*

**Physics**

Top fuel drag racer can reach the maximum speed of 304 mph at the end of the 1/4-mile (402 m) racetrack. (a) Assuming that the acceleration is constant during the race, calculate the average value of the acceleration of the top fuel car. (b) What is the ratio of that ...
*Thursday, September 1, 2011 at 10:53pm by Logan*

**Physics - gravitational acceleration**

How does and Atwood machine make it easier to determine g - the acceleration due to gravity, rather than by just measuring the acceleration of a free-falling object?
*Wednesday, August 11, 2010 at 5:57am by Shaila*

**physics**

The constant force provides the uniform acceleration. Since this acceleration is normal to the velocity, it is centripetal acceleration. The block will move along the curvilinear trajectory (circle).
*Monday, May 21, 2012 at 3:33pm by Elena*

**Physics Changing Acceleration **

Derive position, velocity, and acceleration kinematics equations for an object undergoing a changing acceleration? I understand that somehow we need to get (∆a/∆t) as the change in acceleration into the kinematic equations but I really don't know where to start.
*Saturday, September 28, 2013 at 8:04pm by K*

**Science Plz help**

1. Acceleration involves a change in ____. speed velocity displacement direction 2. Which of the following statements about acceleration is true? Like velocity, acceleration has a direction. Your acceleration is positive when you speed up. Your acceleration is negative when ...
*Friday, March 29, 2013 at 1:42pm by Jman*

**Physics**

To find the velocity and acceleration vectors for uniform circular motion and to recognize that this acceleration is the centripetal acceleration. Suppose that a particle's position is given by the following expression: r(t) = Rcos(omega*t)i + Rsin(omega*t)j Velocity equals...
*Friday, November 13, 2009 at 8:14pm by Becky*

**college phyiscs**

the angular acceleration is 1.60/160 in radian/s^2 I dont see how anything can be solved without know how long it accelerated at this acceleration. Displacement is a function of time, and acceleration.
*Sunday, October 11, 2009 at 11:57am by bobpursley*

**College Physics**

You need to provide units for radious and acceleration. Numbers alone are not enough to define the problem. When the magnitude of the total acceleration is 3.30 whatevers, the centripetal acceleration is presumably sqrt[3.3^2 - 1.3^2). Use that fact and R to compute V. That ...
*Saturday, November 28, 2009 at 1:09am by drwls*

**science **

Newton’s Second Law of Motion is expressed as F = ma. If you are pushing a lawn mower in your backyard and suddenly double the pushing force, what will happen to the lawn mower's rate of acceleration? The mass of the lawn mower is constant. A. The acceleration will double. B. ...
*Friday, February 8, 2013 at 7:36am by katie*

**Physics**

Newton's second law states that if an object has zero acceleration, the net force acting on it is zero. My question is if you have an object at constant acceleration moving downward is there a net force being applied to it? Does constant acceleration= zero net force? Yes, for ...
*Tuesday, April 3, 2007 at 1:34am by Mary*

**Physics**

Compute the magnitude of the tangential acceleration, the radial acceleration, and the resultant acceleration of a point on its rim after it has turned through 38.2^\circ. Enter your answers separated with commas.
*Tuesday, February 7, 2012 at 7:09pm by Anonymous*

**physical**

period= 2PI (Length/acceleration) a) acceleration=g b, c ) acceleration = g+- a
*Thursday, May 31, 2012 at 7:53am by bobpursley*

**PHYSICS I NEED MAJOR HELP PLEEEAAAAAASSSSSSSSSEEEE**

If velocity is positive and increasing then... displacement is.... acceleration is.... If displacement is positive and increasing then...... acceleration is...... velocity is..... If acceleration is positive and increasing then......... displacement is....... velocity is...
*Wednesday, December 13, 2006 at 11:46pm by anonymous*

**physics**

(a) What is the tangential acceleration of a bug on the rim of a 6.0 in. diameter disk if the disk moves from rest to an angular speed of 79 rev/min in 5.0 s? m/s2 (b) When the disk is at its final speed, what is the tangential velocity of the bug? m/s (c) One second after the...
*Saturday, March 27, 2010 at 5:52pm by Kelsey*

**calculus**

THe equation of motion of a particle is s = t^3 - 3t, where s is in meters and t is in seconds. Find (a) the velocity and acceleration as functions of t (b) the acceleration after 2 s, and (c) the acceleration when the velocity is 0
*Tuesday, October 14, 2008 at 10:05pm by Frank*

**phyics**

with the plane starting from rest and a uniform acceleration, the average velocity is 20 m/s so the time of acceleration is 184/20 or 9.2 s the acceleration is (40 m/s) / 9.2 s
*Tuesday, October 15, 2013 at 8:21pm by scott*

**physics**

For the speed of the car (V), solve V^2/R = 2 m/s^2 V = sqrt400 = 20 m/s The centripetal force is (acceleration)*(Mass) = 2*2500 = 5000 N Centrifugal acceleration is the opposite of centripetal acceleration
*Thursday, August 1, 2013 at 11:26pm by drwls*

**Physics**

Which of the following could be units of acceleration? A) mi/h B) m/s C) mph D) m/s/s I know acceleration is the velocity/Time so I think they are all units of acceleration. Is this right?
*Wednesday, September 21, 2011 at 11:33am by Crystal*

**Science**

1. Acceleration involves a change in ____. (1 point) speed velocity displacement direction 2. Which of the following statements about acceleration is true? (1 point) Like velocity, acceleration has a direction. Your acceleration is positive when you speed up. Your acceleration...
*Tuesday, March 12, 2013 at 10:09am by Anonymous*

**PHYSICS!!!**

I need to see your work or thinking to critique it. On c, tangential component is wr. Net linear acceleration will be the vector addition of tangential acceleration and centripetal acceleration.
*Wednesday, March 5, 2008 at 8:05pm by bobpursley*

**physics**

A car engine accelerates at a constant rate from 170 rpm to 3050 rpm in 7 seconds. I have found that at t=0, the angular velocity (omega)=17.8 rad/s, the angular acceleration (alpha)= 43.1 rad/s^2, the tangential acceleration = 7.76 m/s^2, and the centripetal acceleration is ...
*Monday, April 27, 2009 at 1:44am by Elle*

**Physics**

<A ball is thrown vertically upward. What are its velocity and acceleration when it reaches its maximum altitude? At the maximum altitude the ball stops so what are its (instanteous) velocity and acceleration? What is its acceleration just before it hits the ground? > ...
*Wednesday, November 10, 2010 at 7:24am by Dr Russ*

**physics**

Start by calculating the acceleration of the plane as it moves from rest to take-off. It gets up to 80 m/s in 35 seconds, so its acceleration is 80/35 m/s^2. Now you can just plug in the formula for distance travelled under acceleration = ut + 0.5at^2. Initial velocity u is ...
*Tuesday, September 29, 2009 at 1:10am by jim*

**physics **

A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 7.00 g at its outer end. What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end?
*Saturday, November 27, 2010 at 1:05pm by jessica*

**physics **

A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 7.00 g at its outer end. What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end?
*Saturday, November 27, 2010 at 1:05pm by jessica*

**physics**

still saying it's wrong |f| = N 3.23 NO HELP: The frictional force provides the torque needed to give an angular acceleration. Therefore, first find the angular acceleration, then apply the rotational equivalent of Newton's 2nd Law (torque = I*a). HELP: Since the sphere rolls ...
*Friday, April 9, 2010 at 12:01am by rufy*

**Physics**

if an obejct has an horizontal acceleration of -0.51 m/s squared and vertical acceleration of -7.683 m/s squared, what is the resultant acceleration?
*Thursday, October 15, 2009 at 10:49am by Jack*

**IPC**

Again, we start with the question: What would the final speed of a car be after 5.0 seconds with a starting speed of 50 mi/hr? What is needed to solve this equation: Acceleration of the car. Yes that is all that is necessary. To find the acceleration, this is where the 0-60 mi...
*Tuesday, September 11, 2012 at 9:48pm by Jason*

**physics**

If you accelerate due to gravity (free fall), your acceleration is -9.8 m/s2. In some fields, particularly aviation, this is referred to as 1 g of acceleration. If you were accelerating at 2.5 g, what would be your average acceleration? If you started from rest, what would be ...
*Saturday, October 12, 2013 at 12:21pm by iyzi*

**physics**

Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (a) Calculate the acceleration of the sled when starting, and compare it to the ...
*Tuesday, September 21, 2010 at 10:21pm by Anonymous*

**physics**

A fan blade is rotating with a constant angular acceleration of +8.4 rad/s2. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity?
*Tuesday, July 16, 2013 at 2:50pm by frank*

**physics**

Do you want the radius of the car or the path that it is on? The centripetal acceleration of the car would be perpendicular to the velocity. If the total acceleration is 51 degrees N of W, there must also be a tangential acceleration also. The centripetal acceleration would be...
*Friday, November 19, 2010 at 12:02am by drwls*

**physics**

The wording here is a bit suspicious. Maximum acceleration occurs when the amplitude is maximum, and it is acceleration=-(2PI*f)^2*maxAmplitude so when you know the maxAmplitude, you can figure acceleration, which is of course force=mass*acceleration, and the force on the ...
*Monday, November 26, 2012 at 6:37pm by bobpursley*

**PHYSICS~Acceleration**

Two students get in an elevator on the ground floor and ride the elevator up to the fifth floor? Describe what happens to their velocity and acceleration during the trip. Would their velocity be increasing? There would be upward acceleration at first and then there would be ...
*Monday, November 22, 2010 at 7:06pm by Anabelle*

**physics**

Yes, I neglected to notice that V is increasing in (B) When the acceleration starts, V is the original 4.5 m/s value, and you introduce a new tangential acceleration of 1.45 m/s^2. The centripetal acceleration starts at V^2/R = 1.51 m's^2 The magnitude of the acceleration ...
*Thursday, December 2, 2010 at 11:34pm by drwls*

**PHYSICS**

A fan blade is rotating with a constant angular acceleration of +13.7 rad/s2. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity?
*Thursday, October 28, 2010 at 4:31pm by JOHN*

**Physics**

The initial acceleration is F/M = 150 m/s^2. An acceleration change TO 6.0 m/s^2 is not an increase in acceleration. Are you sure is did not increase BY 6.0 m/s^2, to 156 m/s^2?
*Friday, October 8, 2010 at 2:30am by drwls*

**Physics 11th**

a body moves for a total of 9 seconds starting from rest with uniform acceleration and then with uniform retardation which is twice of value of acceleration to stop .what is the duration of uniform acceleration
*Sunday, June 16, 2013 at 9:14am by anonymous*

**Physics/Math**

At time t1 = 2.00 s, the acceleration of a particle in counterclockwise circular motion is (9.00i + 8.00j) m/s^2. It moves at constant speed. At time t2 = 3.00s (3/4 of a revolution later), it's acceleration is (8.00i - 9.00j) m/s^2. Find the radius of the path taken by the ...
*Sunday, February 18, 2007 at 7:51pm by COFFEE*

**physics**

First, find the acceleration: 7.3 = 14.4 - a*t Substitute 3 seconds into the above equation to find the acceleration a. This acceleration is due to the force of friction = ckf*m*g where ckf is the coefficient of kinetic friction, m is the mass of the puck, and g is the ...
*Friday, October 5, 2012 at 12:17am by Jennifer*

**AP Physics B**

can you check my reasoning 1. The problem statement, all variables and given/known data ok well then... we did a lab were you have a hanging mass attached to a stirng that went through a straw and was attached to a rubber stopper. The lab was to find the mass of the rubber ...
*Sunday, September 13, 2009 at 8:42pm by AP Physics B*

**Physics(Please help)**

A fan blade is rotating with a constant angular acceleration of +12.4 rad/s2. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity? I do not know how to start this.
*Tuesday, June 5, 2012 at 3:34pm by Hannah*

**Physics**

A car is traveling around a horizontal circular track with radius r = 190.0 m at a constant speed v = 22.0 m/s as shown. The angle èA = 15.0° above the x axis, and the angle èB = 63.0° below the x axis. 1) What is the magnitude of the car’s acceleration? 2) What is the x ...
*Saturday, January 19, 2013 at 7:08pm by Anonymous*

**physics**

A particular Ferris wheel (a rigid wheel rotating in a vertical plane about a horizontal axis) at a local carnival has a radius of 20.0 m and it completes 1 revolution in 9.84 seconds. (a) What is the speed (m/s) of a point on the edge of the wheel? Using the coordinate system...
*Sunday, February 20, 2011 at 6:03am by waqas*

**Physics**

A particular Ferris wheel (a rigid wheel rotating in a vertical plane about a horizontal axis) at a local carnival has a radius of 20.0 m and it completes 1 revolution in 9.84 seconds. (a) What is the speed (m/s) of a point on the edge of the wheel? Using the coordinate system...
*Saturday, August 6, 2011 at 7:45am by waqas*

**physics**

Total acceleration consists of two perpendicular components. The centripetal acceleration is V^2/R. The tangential acceration is given to be 1.0 m/s^2. When the total acceleration is 2.0, the centripetal acceleration is sqrt(2^2 - 1^2) = sqrt3 = 1.732 m/s^2 Solve V^2/R = 1.732...
*Tuesday, September 22, 2009 at 11:04pm by drwls*

**physics **

which of the following situations are impossible : A) velocity negative, acceleration positive B) velocity positive , acceleration negative C) velocity increasing, acceleration negative D) velocity decreasing , acceleration zero E) velocity negative , acceleration negative
*Monday, September 2, 2013 at 10:17pm by jessica*

**Physics **

Can an object with constant acceleration reverse it's direction of travel? I think it's yes because when a ball is thrown in the air it has a constant acceleration of gravity and the acceleration continues when it reverses it's direction. Am I right??
*Sunday, February 9, 2014 at 6:55pm by Kevin *

**science**

assuming there are no other forces (ignoring friction between the skates and the ice) force=mass*acceleration so... acceleration=force/mass acceleration=234n/45kg=??
*Thursday, January 24, 2008 at 9:31pm by Quidditch*

**Physics**

The horizonal component of force is 60*cos41 b) horizontalforce=mass*horizontial acceleration solve for horizonal acceleration c) distance=vi*time+1/2 acceleration*time^2
*Tuesday, June 21, 2011 at 1:20am by bobpursley*

**physics**

No. first, the acceleration due to gravity on Earth is not 10m/s^2, anywhere. It is very close to 9.81 m/s^2. This is the acceleration due to gravity, it does not matter what the velocity is. Acceleration is constant.
*Saturday, February 4, 2012 at 3:02pm by bobpursley*

**physics**

An accelerometer is a device that uses the extension of a spring to measure acceleration in terms of Earth's gravitational acceleration (g). What is the approximate acceleration if this accelerometer spring is extended just 0.43 centimeters?
*Tuesday, February 25, 2014 at 10:02am by Anonymous*

**AP Physics**

You have a force of 4mg pulling on the apparatus. You know the torque, given r. Torque= I*angular acceleration. You know I (you have each m, and L) Solve for angularacceleration. Now that you have angular acceleration, solve for tangential acceleration,given r. Isn't that the ...
*Monday, February 18, 2008 at 12:41am by bobpursley*

**Physics**

Im not sure, but I believe that they will not. The larger the radius, the smaller the acceleration. Centripetal acceleration = V^2/r, so the runners in the outer lanes will have a smaller centripetal acceleration.
*Monday, January 21, 2013 at 10:32pm by Devron*

**physics**

Landing with a speed of 87.7 m/s, and traveling due south, a jet comes to rest in 939 m. Assuming the jet slows with constant acceleration, find the magnitude and direction of its acceleration. Magnitude of acceleration
*Wednesday, September 5, 2012 at 7:49pm by martha*

**Physics**

at the top, net acceleration=centacc-9.8 at the bottom, add them to get net acceleration centripetal acceleration=v^2/r r, v given. distanceAround/time=v solve for time.
*Monday, June 8, 2009 at 12:49pm by bobpursley*

**Physics**

the acceleration down the plane is 9.8m/s^2 * sinTheta distance=1/2 acceleration*time^2 solve for time, given acceleration above, and distance in the problem.
*Monday, February 10, 2014 at 7:30pm by bobpursley*

**Physics**

An airplane is flying in a horizontal circle at a speed of 104 m/s. The 73.0 kg pilot does not want the centripetal acceleration to exceed 6.98 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is 9.81 m/s2. Answer in ...
*Tuesday, March 5, 2013 at 8:02pm by Anonymous*

**physics**

examples of: 1) acceleration against the direction of motion 2) acceleration in direction of motion 3)acceleration is uniform 4)acceleration is non-uniform
*Saturday, June 23, 2012 at 8:13am by JOSHI *

**Physics**

1) would dropping an object higher than it's usual point change it's acceleration? 2) would throwing an object upward change it's acceleration? 3)does the mass of an object affect it's acceleration? 4) how does altitude affect the value of g? what other factors cause this ...
*Monday, September 26, 2011 at 9:47pm by WOLLY*

**physics**

linear acceleration=1.71/min^2, I certainly would change that to rad/sec^2 , time radius tangential acceleration=angularacceleration*radius. Since angular acceleration is constant, it does not matter what angular velocity is.
*Monday, September 27, 2010 at 7:26pm by bobpursley*

**physics**

(a) What is the tangential acceleration of a bug on the rim of a 6.0 in. diameter disk if the disk moves from rest to an angular speed of 79 rev/min in 5.0 s? (b) When the disk is at its final speed, what is the tangential velocity of the bug? (c) One second after the bug ...
*Sunday, March 28, 2010 at 1:21am by Kelsey*

**Physics**

A centripetal acceleration (horizontal) of 9.04 m/s^2, combined with the existing (vertical) Mars gravity acceleration of 3.8 m/s^2, will reasult in a resultant acceleration of 9.81 m/s^2. Require that V^2/R = 9.04 m/s^2 V = 134 m/s = 300 mph It does not seem practical. You'd ...
*Sunday, July 31, 2011 at 10:15pm by drwls*

**Physics**

well,the component of weight down the slide is mg*sinTheta Force= mass*acceleration mg*sinTheta=m*acceleration solve for acceleration
*Monday, September 12, 2011 at 6:39pm by bobpursley*

**Physics 1 - Mechanics**

Since the force is GmM/r^2, it varies directly with the mass of the planet, and inversely with the radius-squared. 4*mass = 4 * acceleration 6*radius = 1/36 * acceleration Then just plug in your equations of motion with the new acceleration value.
*Friday, October 14, 2011 at 12:47pm by Steve*

**physics**

What do you mean by 6 "gm" acceleration? Grams are not used to measure acceleration. Do you mean 6 g? Or 6 m/s^2 In either case, the effective weight is F = m a where a is the acceleration rate of the rocket. If the astronaut is close to Earth, a gravitational weight term must...
*Saturday, November 26, 2011 at 12:34am by drwls*

**physics**

A car accelerates at a constant rate from zero to 25.9 m/s in 7.6 seconds and then slows to 15.4 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the entire time?What was the acceleration during the first acceleration period?
*Wednesday, May 22, 2013 at 4:29pm by giggles24*

**physics**

Acceleration is how fast the velocity is changing. So, in general, it does depend on the velocity. However, if you are talking about motion such as that caused by gravity, where there is uniform acceleration, then the acceleration is constant, since the force being applied is ...
*Monday, June 24, 2013 at 10:39am by Steve*

**SCIENCE**

On speed, a straight line means constant slope, which is acceleration. Acceleration is constant. Horizontal line? acceleration is zero (slope is zero). on an acceleration graph, a straight line means acceleration is changing with time. Only a horizontal line means the change ...
*Wednesday, March 19, 2008 at 12:00am by bobpursley*

**Physics**

An airplane is ﬂying in a horizontal circle at a speed of 104 m/s. The 88.0 kg pilot does not want the centripetal acceleration to exceed 6.15 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is 9.81m/s2. Answer ...
*Friday, February 8, 2013 at 5:03pm by Dave*

**physics**

A racing car reaches a speed of 40 m/s. At this instant, it begins a uniform negative acceleration, using a parachute and a braking system, and comes to rest 5.0 s later. (a) Determine the acceleration of the car. (b) How far does the car travel after acceleration starts?
*Friday, September 7, 2012 at 12:21am by Tamera*

**Physics**

Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a traffic light. make a statement concerning its acceleration. a) the car is decelerating and its acceleration is positive b)the car is decelerating and its acceleration is negative c...
*Friday, September 21, 2007 at 1:53pm by Tammy*

**Physics**

The tension on a string from which a 5.00kg object is suspended in an elevator is T=(44.0j)N. What is the acceleration of the elevator? Specify the acceleration in unit vector notation. T - Mg = M a with positive force upward. a = T/m - g = 8.8 - 9.8 = -1.0 m/s^2 Multiply that...
*Tuesday, February 20, 2007 at 4:11am by Sabrina*

**Physics**

You don't need the velocity to answer the question. You need the acceleration at a particular time. This is not a constant-acceleration problem. The acceleration is the second derivative of the x(t) function, a(t) = x''(t) = 7.00 - 15 t Multiply the value of a at 3.45 s by the...
*Tuesday, September 22, 2009 at 1:55am by drwls*

**college physics**

You should know by now that you have to include dimensions with your radius and acceleration numbers. If the tangential acceleration is always 0.300 (m/s^2?), the centripetal accleration (which is perpendicular to tangential) will be 1.98 m/s^2 when the total acceleration is 2...
*Wednesday, November 24, 2010 at 9:32pm by drwls*

**physics**

Eq= force= mass*acceleration solve for the acceleration upward. NOTE: the u above is initial velocity, in the direction of deflection, u is zero. a is acceleration s is distance. now back to the problem ************************* I would like to know the measurements of the ...
*Friday, September 16, 2011 at 12:25pm by bobpursley*

**Physics**

An airplane is flying in a horizontal circle at a speed of 106 m/s. The 81.0 kg pilot does not want the centripetal acceleration to exceed 6.16 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is 9.81 m/s2. Answer in ...
*Tuesday, November 13, 2012 at 7:39pm by Kyla*

**physics**

a jet plane flying at 550 m/s makes a curve. The radius of the circle in which the plane is flying is 9.0 X 10^3 m. What centripetal acceleration does the plane experience? Express this acceleration relative to g, the acceleration due to gravity.
*Tuesday, November 1, 2011 at 10:08pm by Dee*

**physics 20 **

acceleration due to gravity must be factored in as the rocket is traveling upwards. since you have chosen up to be positive acceleration down must be negative, making gravity -9.8m/s the equation is still force=mass x acceleration accept the formula used to calculate ...
*Tuesday, November 3, 2009 at 10:08pm by Jordan*

**phy**

A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 340 km/h in a semicircular arc with a radius of 196 m. Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration. ...
*Saturday, September 18, 2010 at 6:05pm by ami*

**phy**

A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 340 km/h in a semicircular arc with a radius of 196 m. Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration. ...
*Sunday, September 19, 2010 at 6:31pm by ami*

**physics**

A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 320 km/h in a semicircular arc with a radius of 190 m. 1.) Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration...
*Monday, September 20, 2010 at 3:05pm by rick*

**Physics**

You are going to need the ferris wheel radius R to compute an actual number for the acceleration. The angular velocity is w = 10*pi/60 s = 0.524 rad/s The acceleration is R*w^2, always toward the center of the wheel. It is centripetal. There is no tangential acceleration if ...
*Monday, January 14, 2013 at 5:19pm by drwls*

**Physics**

The statement that the velocity and acceleration MUST be in the SAME DIRECTION is not correct. A particle can have an initial velocity in one direction and have an acceleration in another. Over time, the particle's velocity will not be in the opposite direction of the ...
*Monday, September 2, 2013 at 10:05pm by Devron*

**Angular acceleration**

Appreciate if someone can advise on how to calculate the following: A hoist lifts a 3.5kg load from rest, and has a final velocity of 2 m/s after 4 seconds. The motor can develop a torque of 4 Nm. Determine: i) The linear acceleration of the mass. ii) The angular acceleration ...
*Saturday, March 24, 2007 at 7:46am by BIGEYE*

**physics**

Current velocity = (time)*(acceleration) + initial velocity 12 = (0.96)*acceleration + 0 acceleration = 12.5 m/s2
*Wednesday, February 9, 2011 at 2:38pm by Nadir*

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