Friday

December 19, 2014

December 19, 2014

Number of results: 56,498

**Physics**

Alright so I need some help were doing Friction and Centripetal Force A 1250 Kg car traveling at 12 m/s is exiting circular highway exit ramp with a radius of 36 meters then I'm asked to find the acceleration the centripetal force the normal foce which I have done then I'm ...
*May 11, 2009 by HELP ME!*

**Advanced Maths (Vectors) AQA Level, please help?**

An object is moving in a plane. At time t =0,it is at origin O, and moving with velocity u. After 2 seconds, it is at A, where OA = -2i - 4j. After 3 seconds, it is at B, where AB= 10i -40 j. Show that this is consistent with constant acceleration a. Find a and u
*February 26, 2012 by Jat*

**Physics**

ball starts from rest under constant acceleration. If it travels a distance of 20.0 cm after time t, how far from the starting point is it after time 2t? Answer 40.0 cm. 60.0 cm. 80.0 cm. 100.0 cm. More information is needed to answer this question.
*September 10, 2012 by beanstalk1*

**physics**

A train pulls away from a station with a constant acceleration of 0.44 m/s2. A passenger arrives at a point next to the track 6.2 s after the end of the train has passed the very same point. What is the slowest constant speed at which she can run and still catch the train?
*September 19, 2010 by Chip*

**Physics - Momentum of cars at intersection**

Car A(1750kg) traveling due south and car B (1450kg)due east. They reach the same intersection at the same time and collide. The cars lock together and move off at 35.8km/h[E31.6degS]. What was the velocity of each car before the collided? I tried this question using the law ...
*September 1, 2010 by Shaila*

**College Physic I**

A space probe is traveling in outer space with a momentum that has a magnitude of 4.99 x 107 kg·m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 1.87 x 106 N and a direction opposite to the probe's motion. It fires for...
*February 25, 2012 by Angela*

**Physics**

Given: g=9.81 m/s square. The parachute on a race car that weighs 8042 N opens at the end of a quarter-mile run when the car is traveling 35 m/s. What net retarding force must be supplied by the parachute to stop the car in a distance of 1020 m? Answer in units of N. I have no...
*February 25, 2008 by Jenna*

**Physics **

A car accelerates for 5 seconds at 2.1 m/s^2. If the car initially had a speed of 10 m/s, what is the new speed?
*October 7, 2012 by Tori*

**Physics**

Two cars are drag racing, starting from rest at t = 0, on a straight and level road. Team Alpha's car produces acceleration ax = alpha t^(-1/2) ; while Team Beta's car produces acceleration ax = Beta ; for all t > 0, where alpha and beta are positive constants with suitable...
*February 9, 2011 by Abi*

**physics**

A 3.24 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=11.8N at an angle theta=23.0degrees above the horizontal, as shown. What is the magnitude of the acceleration of the block when the force is applied? b.) What is the horizontal...
*January 28, 2012 by Rachel *

**physics**

A cannon is mounted on a railroad car. The cannon shoots a 1.75 kg ball with a muzzle velocity if 300 m/s. The cannon and the railroad car together have a mass of 4500 kg. if the ball, cannon, and railroad car are initially at rest, what is the recoil velocity of the car and ...
*September 30, 2013 by Cori*

**physics**

the brake linings of the wheels of a car have total mass 4.8kg and specific heat capacity 1200 J kg -1 K-1. calculate the maximum possible temperature rise of the brake linings when the car (of mass 800kg) travelling at 15 ms-1 is brought to rest by applying the brakes.
*January 25, 2012 by jeremy*

**physics**

A compact car, mass 875 kg, moving south at 16 m/s, is struck by a full-sized car, mass 1660 kg, moving east at 12 m/s. The two cars stick together, and momentum is conserved in the collision. The wreck skids along the ground and comes to a stop. The coefficient of kinetic ...
*February 4, 2013 by Tony*

**physics**

A 3.6 kg mass hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right, the rope makes an angle of 1.0° with the vertical. Find the acceleration of the car.
*June 9, 2008 by Elisa*

**physics**

a 17 kg car travels in a flat circle . At a certain instant the velocity of the car is 18m/s west and the total acceleration of the car is 2m/s^2 at 51 degrees north west. what is its radius? answer in units of km.
*November 19, 2010 by maira*

**physics**

A 500 kg car moves along a horizontal road. The car moves with an acceleration 2.5 m/s2 by a driving force of 2500 N when the air resistance is 400 N. Find the friction of the tyre of the car.
*November 30, 2010 by Anonymous*

**physics**

An amusement park ride consists of a car moving in a vertical circle on the end of a rigid boom of negligible mass. The combined weight of the car and riders is 5.0 kN, and the circle’s radius is 10 m. At the top of the circle, what are the (a) magnitude FB and (b) direction (...
*February 26, 2010 by tucker*

**physics**

A toy car runs off the edge of a table that is 1.683 m high. The car lands 0.3309 m from the base of the table. The acceleration of gravity is 9.8 m/s2 . How long does it take for the car to fall? Answer in units of s. - What is the horizontal velocity of the car? answer in ...
*November 8, 2009 by Anonymous*

**Physics **

Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the following questions. Be sure to show your work. You are a traffic accident investigator. You have arrived at the scene of an accident. Two cars of equal ...
*December 15, 2014 by Annet*

**please help! physics**

A 1200 kg car is moving at 95 km/h when the driver notices a deer down the road. He immediately moves his foot toward the brake pedal, taking only 0.50 seconds before the car starts slowing down. The brakes cause a net force of 2400 N (backwards) on the car for 2.0 seconds. ...
*October 21, 2014 by Caroline*

**Science**

A child in a boat throws a 5.30 kg package out horizontally with a speed of 10 m/s, see the figure. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.0 kg and that of the boat is 55.0 kg What is the magnitude?
*October 20, 2011 by kago*

**Physucs**

A clerk pushes a filing cabinet of mass 22.0 kg accross the floor by exerting a horizontal force of magnitude 98 N. The magnitude of the force of kinetic friction acting on the cabinet is 87 N. The cabinet starts from rest. Use the law of conservation of energy to determine ...
*November 30, 2006 by Raj*

**physics**

A driver in a car traveling at a speed of 79 km/h sees a cat 107 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 103 m? Answer in units of s
*October 13, 2011 by Asdfghjkl*

**physics**

A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? Answer in units of s
*December 14, 2011 by Anonymous*

**Physics **

A 1400 kg car rounds a curve of 57 m banked at an angle of 14 degree If the car is traveling at 98 km/h, how much friction force will be required? I cannot figure out how to solve this problem. Someone please help me?
*June 17, 2012 by Mike Joseph*

**physics**

A driver in a car traveling at a speed of 66 km/h sees a cat 118 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 114 m? Answer in units of s
*September 25, 2012 by gabbie*

**physics**

A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? answer in units of s
*September 30, 2013 by alex*

**physics**

A driver in a car traveling at a speed of 70 km/h sees a cat 129 m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 125 m? answer in units of s
*September 30, 2013 by alex*

**physics**

if the brakes of an automobile are applied from 70km/h to 35km/h, how many meters does the car travel during this deceleration?
*July 25, 2011 by ruel*

**AP Physics**

A 1200 kg car is moving at 33 m/s then has the brakes applied at a deceleration of 6.1 m/s. How far will it move before stopping?
*October 29, 2012 by Alexis*

**Physics**

A 1250 kg car travelling at 60.0 km/h comes to a sudden stop in 35 m. What is the coefficient of friction acting on the brakes?
*February 24, 2014 by John Appleseed*

**Phyiscs**

if the brakes of an automobile are applied from 70km/h to 35km/h, how many meters does the car travel during this deceleration?
*July 11, 2014 by Neil*

**physics**

The drawing shows a 25.1-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, 1 and 2, are applied to the crate, and it begins to move. The coefficient of kinetic friction between the crate and the floor is μk = 0...
*October 1, 2013 by help please*

**Physics**

A small utility car is pulled along a straight section of railroad tracks by a rope. When the ropepulls the car for 10 seconds the car reaches a final speed, after starting from rest, of 8m/s. Now the situation is modified slightly so that the rope pulls, just as hard as in ...
*February 13, 2011 by John*

**College Algebra**

car traveling on a road perpendicular to railroad track, car is 30 meters from the crossing, train is 50 meters from the car; how far is the train from the crossing?
*May 8, 2010 by Margaret*

**Chemistry**

A sample of gas (26.1 g) initially at 3.00 atm was compressed from 21.00 L to 6.00 L at constant temperature. After the compression, the gas pressure was __________ atm.
*April 22, 2010 by Camarra*

**Help me please with physics**

A 25kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. a) what speed does the mass have after 4.0 seconds? b) what speed does the mass have after being moved 2...
*October 15, 2010 by Nicole*

**physics**

A man is driving his car ata velocity of 100km/h on a straight road. H e sees a traffic jam at a distance and slows down to 12.5m/s in 3.0s. What is the average acceleration of the car? pls help. I know that the formula for average acceleration is V2-V1 divided by T2-T1 but ...
*October 12, 2011 by ted*

**Physics**

Two cars are drag racing, starting from rest at t = 0, on a straight and level road. Team Alpha's car produces acceleration ax = alpha t^(-1/2) ; while Team Beta's car produces acceleration ax = Beta ; for all t > 0, where alpha and beta are positive constants with suitable...
*February 9, 2011 by Abi*

**Physics**

A CD rotates at 500 (revolutions per minute) while the last song is playing, and then spins down to zero angular speed in 2.60 seconds with constant angular acceleration. The magnitude of the angular acceleration of the CD, as it spins to a stop is 20.1 radians per second ...
*November 3, 2007 by Christina*

**pre cal**

you decide to buy a car for 25000. each year your car depreciates in value by 5% from its original value. After 15 years though, your used car will only be worth $500 to a dealership. Write a piece wise function for C(t), car value over time, for this scenario Graph the ...
*September 7, 2014 by eunice*

**physics**

Car moving down road accelerates at uniform rate 2.8 m/s/s for 4.63 s to reach a speed of 106.7 m/s. 1) How fast was the car initially moving? 2) What distance did it travel during the a/c/c.?
*October 17, 2007 by jane*

**physics**

In the figure below, a constant horizontal force Fapp of magnitude 17 N is applied to a wheel of mass 8 kg and radius 0.70 m. The wheel rolls smoothly on the horizontal surface, and the acceleration of its center of mass has magnitude 0.75 m/s2. (a) In unit-vector notation, ...
*January 5, 2011 by Joey*

**physics**

Proper design of automobile braking systems must account for heat buildup under heavy breaking. Calculate the thermal energy dissipated from brakes in a 1500 kg car that descends a 17° hill. The car begins braking when its speed is 95 km/h and slows to a speed of 35 km/h in a ...
*November 5, 2012 by Lauria*

**Physics**

A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?
*January 31, 2011 by Tim*

**Physics**

A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?
*January 31, 2011 by Tim*

**Physics**

A wheel of radius R starts from rest and accelerates with a constant angular acceleration alpha about a fixed axis. At what time t, will the centripetal and tangential accelerations of a point on the rim have the same magnitude?
*October 23, 2011 by Jc*

**Physics**

b) If the car is moving much faster than the heavier truck when they collide, what best describes the size (or magnitude) of the forces between the car and the truck? 1. Not enough information is given to pick one of these answers. 2. Neither exerts a force on the other; the ...
*October 14, 2012 by Amelia *

**physics**

A football is thrown horizontally with an initial velocity of (16.5 m/s). Ignoring air resistance, the average acceleration of the football over any period of time is (-9.81 m/s2). (a) Find the velocity vector of the ball 1.62 s after it is thrown. (b) Find the magnitude and ...
*May 14, 2007 by micole*

**Physics**

A car is coasting to a stop. The total drag (frictional Forces) on the 200kg car equal 2000N. Initial velocity is 25 m/s 1. What is the acceleration of the car? 2. How far does it travel before comming to a stop?
*May 26, 2012 by Khloe B*

**Physics**

The brakes on your automobile are capable of slowing down your car at a rate of 4.2 m/s^2. a) If you are going 145 km/h and suddenly see a state trooper, what is the minimum time in which you can get your car under the 90 km/h speed limit? b) Graph x vs. t and v vs. t for such...
*June 13, 2011 by CM*

**physics**

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...
*July 7, 2010 by Ricky*

**physics**

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...
*July 7, 2010 by Ricky*

**Physics**

A 710kg car drives at a constant speed of 23m/s . It is subject to a drag force of 500 N. What power is required from the car's engine to drive the car (a) on level ground? (b) up a hill with a slope of 2.0∘ ?
*November 23, 2013 by Amy*

**physics**

A 6110-kg bus traveling at 20.0 m/s can be stopped in 24.0 s by gently applying the brakes. What is the average force exerted on the bus in this stop? I can't figure this one out
*April 2, 2008 by Jon*

**Physics**

At 1:00 p.m. a car, traveling at a constant velocity of 96 km/h toward the west, is 24 km to the west of our school. How far from the school will it be at 3:30 p.m.? Answer in units of km. I've been attempting this problem for at least 30 minutes and not getting the right ...
*September 30, 2011 by Becca*

**Physics **

A jet plane has a takeoff speed of Vto=125km/h (34.72 m/s) and it's engines can power it to accelerate with an average acceleration of 5.6 m/s^2. A.) what length of runway will it need to take off safely? B.) suppose it had an available runway length of only 75m. What minimum ...
*February 8, 2014 by Michelle*

**Physical Science**

Suppose you are moving left (negative) with a velocity of -10 m/s? What happens to your speed if you have a negative acceleration? Do you speed up or slow down?
*October 12, 2013 by unknown*

**physics **

Hydrogen atom is initially in the ground state. It is excited by a photon bombardment and it then undergoes a transition from n = 3 to n=2 state. a) What is the frequency of the bombarding photon? b) What are the energy, momentum and the wavelength of the emitted photon? c) ...
*April 25, 2011 by qwer*

**physics**

tad drops a cherry pit out the car window 1 m above the ground while traveling down the road at 18 m/s. a.how far, horizontally, from the initial dropping point will the pit hit the ground? b. if the car continues to travel at the same speed, where will the car be in relation ...
*October 26, 2008 by Bailey*

**physics**

(from Arons) Cars A and B travel along the same straight track. Car A is located at position s= 0.20 m at clock reading t= 0.0 s, and it maintains a constant speed of v= 0.17 m/s. Car B is located at position s=0.0 m at clock reading t= 0.04 s, and it maintains a constant ...
*October 8, 2012 by veronics*

**physical science**

a car has a mass of 1000kg and accelerates at 2m/s/s. What is the magnitude of the force exerted on the car.
*September 10, 2008 by robin*

**physics**

a car is approaching a traffic light at 25m/s when it turns red. The driver takes 1 second to react and put his foot on the brake pedal, after which the car decelerates at 2m/s^2. find the distance needed for the car to come to stop after the light turns red
*January 25, 2011 by Keith*

**physics**

Two spherical objects are separated by a distance of 1.41 × 10^-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each ...
*February 14, 2013 by shaun*

**physics**

Two spherical objects are separated by a distance of 1.53 × 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object...
*July 28, 2014 by Lily*

**Algebra**

How long will it take for a car that is traveling at 60 mph to overtake a bus that is traveling at 50 mph if the bus had a 2-hour head start?
*September 3, 2010 by Marlene*

**algebra**

How long will it take a car traveling at 60 mph to overtake a bus traveling at 40 mph if the bus had a 1.5 hour head start?
*February 20, 2011 by Jam*

**physics**

ignoring air resistance, describe how an object would fall to the ground using the words velocity and acceleration for a ball that is thrown straight up: a.) the velocity is __on the way up (increasing, decreasing, constant, zero) b.)the velocity is __at the very top (...
*October 9, 2012 by Anita*

**calculus**

At a summer campfire, the radius of a marshmallow on a stick expands at the rate of \ {r ' (t)} = \frac{2.1 }{1 t + 5} mm/s where t is the time of heating in seconds. Initially the radius was 3.8 mm. Find the radius after 27 seconds using the following steps: When substituting...
*March 8, 2014 by ricky*

**p3**

A block of wood of mass 0.86 kg is initially at rest. A bullet of mass 0.048 kg traveling at 102.3 m/s strikes the block and becomes embedded in it. With what speed do the block of wood and the bullet move just after the collision?
*March 14, 2012 by opp*

**physics**

A ball is launched from the ground at a 45 degree angle above the horizontal (which we take to be the x-axis). It rises to a maximum height, falls back down to the ground and bounces. After the bounce its velocity again makes a 45◦ angle to the horizontal x-axis, but the...
*September 27, 2010 by Anonymous*

**physics**

a net horizontal force of 7000N is applied to a car which is at rest.the weight of the car is 90000N. what will be the speed of the car after 10 second?
*March 31, 2012 by sugin*

**Physics**

A car leaves a city at 70 km/hr. After 15 minutes, another car follows at 80 km/h. How long will it take for the second car to reach the first, and at what distance?
*October 3, 2012 by Luicia*

**Math**

At 10 am two cars start traveling toward each other from 287 miles apart. They passed each other at 1:30 pm. If the rate of the fster car exceeded the rate of the slower car by 6 miles per hour, find the rat (in mph) of the faster car. A. 38 B. 40 C. 44 D. 48 E. 50 I think it ...
*November 7, 2010 by Quinn*

**Re: Physics/Math**

A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the right.) Calculate the...
*February 10, 2007 by COFFEE*

**physics**

A child in a boat throws a 6.00 kg package out horizontally with a speed of 12.0 m/s, Fig. 7-28. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25.0 kg and that of the boat is 50.0 kg. Magnitude ___m/sDirection
*March 13, 2011 by joe*

**Calculus**

After t years, the value of a car that originally cost $16,000 depreciates so that each year is is worth 3/4 of it's value for the precious year. Find a model for V(t), the value of the car after t years. Sketch a graph of the model and determine the value of the car 4 years ...
*November 7, 2010 by Chelsea*

**Physics**

A block of wood of mass 0.91 kg is initially at rest. A bullet of mass 0.047 kg traveling at 104.7 m/s strikes the block and becomes embedded in it. With what speed do the block of wood and the bullet move just after the collision?
*March 31, 2010 by Max*

**Algebra**

A car is traveling at an average speed of 54 miles per hours. How many minutes will it take the car to travel 117 miles
*May 8, 2014 by Anonymous*

**PHYSICS**

A CAR IS TRAVELING AWAY FROM YOU AT 70.0 MI/H. THE CAR HORN PRODUCES A SOUND AT A FREQUENCY OF 5000HZ. WHAT FREQUENCY DO YOU HEAR?
*April 15, 2012 by ~ALICE~*

**PHYSICS**

A CAR IS TRAVELING TOWARDS YOU AT 70.0 MI/H. THE CAR HORN PRODUCES A SOUND AT A FREQUENCY OF 5000HZ. WHAT FREQUENCY DO YOU HEAR?
*April 15, 2012 by ~ALICE~*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*January 22, 2012 by mo*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*January 22, 2012 by mo*

**Physics (please help)**

Two cars are drag racing, starting from rest at t = 0, on a straight and level road. Team Alpha's car produces acceleration ax = alpha t^(-1/2) ; while Team Beta's car produces acceleration ax = Beta ; for all t > 0, where alpha and beta are positive constants with suitable...
*February 11, 2011 by Abi*

**physics**

A car passes a policeman at speed v, well above the speed limit. The policeman accelerates his motorcycle at the time the car passes with constant acceleration a. In the graphs below, the two lines correspond to the motion of the cop and the motion of the speeder from the ...
*September 17, 2013 by Sue*

**Chemistry**

A system initially has an internal energy U of 493 J. It undergoes a process during which it releases 107 J of heat energy to the surroundings, and does work of 225 J. What is the final energy of the system, in J?
*May 5, 2014 by Chris*

**Physics**

In a television tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.0 105 N/C during the first 5.0 cm of the tube's length; then they move at essentially constant velocity another 45 cm before hitting the screen. (a) Find the speed of ...
*January 20, 2011 by Anonymous*

**Physics**

Suppose that a police car on the highway is moving to the right at 20 m/s, while a speeder is coming up from almost directly behind at a speed of 31 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder. Assume that the ...
*October 16, 2007 by Mary*

**math**

A motorcycle leaves Colorado Springs traveling north at an average speed of 47 miles per hour. One hour later, a car leaves Colorado Springs traveling south at an average speed of 54 miles per hour. How long after the motor cycle leaves will it take until they are 552 miles ...
*May 31, 2011 by elaine*

**Word Problem, math.**

A police car traveling 100 ft/sec is chasing a car being driven erratically at 75 ft/sec. If the police car is 300 feet behind the other vehicle when the chase began, about how many seconds will it take to catch the erratic driver? I think I know how to solve this, but I want ...
*September 5, 2010 by Arie*

**physics**

A student tools along in his new Vette weaving in and out of slow traffic, overtaking little kids boarding the school bus, passing school zones without a second glance, cutting off ambulances and fire trucks, running yellow lights, red lights, yield signs, and stop signs ...
*August 30, 2014 by Donny*

**Physics**

A disgruntled physics student sees the front end of his teacher's car below him at the base of a building. If the student is 5.0 m high above the car which is 3.0 m long and traveling only 3m/s to the right, will the apple of the student hit the teacher's car?
*June 24, 2014 by VAN*

**Physics**

A motorist travels at a constant speed of 34.0 m/s through a school zone; exceeding the posted speed limit. A policeman, waits 7.0 s before giving chase at an acceleration of 3.9 m/s2. (a) Find the time required to catch the car, from the instant the car passes the policeman...
*October 10, 2009 by Erin*

**Calculus**

After t hours of an 8-hour trip the distance a car travels is modeled by: D(t)= 10t + (5)/(1+t) - 5 where D(t) is measured in meters. a) derive a formula for the velocity of the car. b) how fast is the car moving at 6 hours? c) derive a formula for the car's acceleration. I'm ...
*March 18, 2007 by Aletha*

**Physics**

A police car's siren has a frequency of 567-Hz while traveling at 24.8-m/s. If the car is coming toward you, and you are stationary, what frequency would you hear?
*February 28, 2013 by Aubrey*

** math**

a car is traveling at a speed of 30.0m/s encounters an emergency and comes to complete stop how much time will it take for the car to stop if it decelerates -4.o m/s^2
*October 9, 2013 by Anonymous*

**AP Physics**

A 2.8 kg mass hangs at one end of a rope that is attached to a support on a railroad car. When the car accelerates to the right, the rope makes an angle of 9.0° with the vertical, as shown in Figure P4.68. Find the acceleration of the car.
*October 5, 2010 by Frank*

**physics**

A fuzzy die (m = 0.2 kg) hangs from the ceiling of a car. When the car accelerates forward along a horizontal road, the die swings backward so the the string supporting it makes an angle of 4o with the vertical. What is the acceleration of the car?
*March 4, 2012 by Anonymous*

**physics**

A van traveling down a slope with a uniform acceleration of 2.15 meters/second2 attains a speed of 20.00 meters/second after 7.00 seconds. What is the initial velocity of the van?
*June 22, 2012 by Anonymous*

**physics**

A van traveling down a slope with a uniform acceleration of 2.15 meters/second2 attains a speed of 20.00 meters/second after 7.00 seconds. What is the initial velocity of the van?
*July 9, 2012 by jasmine*

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