Thursday

April 17, 2014

April 17, 2014

Number of results: 49,938

**physics**

A person takes a trip, driving with a constant speed 94 km/h except for a 83 min rest stop. If the person's average speed is 70 km/h, how far is the trip? Answer in units of km
*Wednesday, August 24, 2011 at 7:06pm by Shannon*

**Physics**

What is the impact speed when a car moving at 114.0 km/h bumps into the rear of another car traveling in the same direction at 104.5 km/h?
*Thursday, January 26, 2012 at 9:52pm by Paige*

**Physics**

An Indy car with a speed of 120 km/h goes around a level, circular track with a radius of 1 km. What is the centripetal acceleration of the car (in m/s/s)?
*Thursday, May 10, 2012 at 12:11pm by Bob*

**Physics**

A driver entering the outskirts of a city takes her foot off the accelerator so that her car slows down from 90 km/h to 50 km/h in 10 s. Find the car's average acceleration.
*Sunday, March 6, 2011 at 11:39pm by Emily*

**Physics**

A car travels in a straight line with an average velocity of 80 km/hr for 2.5 hours and then with an average velocity of 40 km/hr for 1.5 hours. a. Calculate the largest displacement for the 4-hour trip. b. Calculate the largest average velocity for the total trip in ...
*Wednesday, August 28, 2013 at 9:54pm by K*

**Physics**

A train traveling at a speed of 110 km/h uniformly decelerates for 20 seconds. During that time it travels 450 m. a. What is the acceleration ? = m/s2 b. What is its speed after the deceleration ? = km/h
*Friday, November 8, 2013 at 6:40pm by Tom*

**physical science**

A person takes a trip, driving with a constant speed 85.6 km/h except for a 22.6 minute rest stop. If the person's average speed is 61.6 km/h, how far is the trip? Answer in units of km.
*Monday, February 11, 2008 at 3:09am by Anonymous*

**Physics**

A car whose speed is 90.0 km/h (25 m/s) rounds a curve 180 m in radius that is properly banked for speed of 45 km/h (12.5 m/s). Find the minimum coefficient of friction between tires and road that will permit the car to make a turn. What will happen to the car in this case? My...
*Wednesday, August 15, 2012 at 9:58am by TJR*

**maths**

A car travels 140 km during the journey it averages 35 km\h.how long will it take to travell this distance
*Wednesday, February 13, 2013 at 4:44am by justin matthew holland*

**Math**

19. A family takes a car trip. They travel for an hour at 80 km/h and then for 2 hours at 40 km/h. Find the average speed. (Hint, Remember to consider the total distance and the total amount of time.)
*Friday, April 26, 2013 at 10:45pm by June*

**physics**

A car starts at a position of x=6 km and has a speed of 6 mph. After 42 s the car has a speed of 60 mph. Determine the magnitude of the car's average acceleration during this time.
*Tuesday, January 21, 2014 at 8:30pm by Dave*

**math...?**

to save fuel on the 240 km trip to the cottage, the Nakamura family reduce their usual average speed by 20 km/h. this lengthens their journey by 1 hour. what is the slower average speed? i was told this question is not complete to answer? is that true?
*Monday, March 21, 2011 at 11:02pm by dawn*

**physics**

Let the train must travel with a speed of x km . Average speed = Total distance travelled\Total time taken 60km\hr =30 km + 90km\x + 1hr x +1hr =120km \60 x = 2 - 1 = 1 time taken to cover 90km = 90\1 =90km\hr ans - The train must travel the next 90 km with a speed of 90 km/h ...
*Thursday, June 3, 2010 at 10:46am by Miranda*

**physics**

A car accelerates uniformly from rest to a speed of 64.5 km/h (17.9 m/s) in 10 s. Find the distance the car travels during this time.
*Tuesday, February 16, 2010 at 6:12pm by lindsey*

**physics**

A car accelerates uniformly from rest to a speed of 55 km/h (15 m/s) in 14 s. Find the distance the car travels during this time.
*Saturday, October 8, 2011 at 2:00pm by Girl*

**scottsdale CC**

A car travels around a curve at a constant speed of 80.0 km/h. What is the car’s instantaneous velocity at an instant when it is headed west
*Monday, February 20, 2012 at 1:42pm by juan *

**physics**

The average speed was 237.5 km/h (half the maximum, at the end). Convert that average speed to m/s and multiply the result by 4.88 s 237.5 km/h = 65.97 m/s Take it from there.
*Tuesday, November 8, 2011 at 7:52pm by drwls*

**physics**

A car decelerates at a constant rate from 98.5 km/h to 67.9 km/h over a distance of 0.651 km. How many seconds is the car decelerating?
*Thursday, October 4, 2012 at 9:02pm by Victoria*

**Physics**

At an antique car rally, a Stanley Steamer automobile travels north at 38 km/h and a Pierce Arrow automobile travels east at 51 km/h. Relative to an observer riding in the Stanley Steamer, what are the x- and y-components of the velocity of the Pierce Arrow car?
*Monday, February 8, 2010 at 7:24pm by Max*

**Physics**

At an antique car rally, a Stanley Steamer automobile travels north at 38 km/h and a Pierce Arrow automobile travels east at 51 km/h. Relative to an observer riding in the Stanley Steamer, what are the x- and y-components of the velocity of the Pierce Arrow car?
*Tuesday, February 9, 2010 at 12:22am by Max*

**algebra**

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic solution. Let V = Maurice'...
*Tuesday, February 13, 2007 at 8:19pm by Shay*

**Physics**

distance engineer moved = 500 m = .5 km average speed = (84.2 +16.4)/2 = 50.3 km/hr (during constant acceleration you can use the average of first and last for the distance and time) time = distance/speed = .5km / 50.3 km/hr = .00994 hours * 3600 = 35.8 seconds
*Wednesday, March 5, 2014 at 8:34pm by Damon*

**physics**

A car travels on a straight road for 40km at 30km/h. It then continues in same direction for 40km at 60km/h. a)What is the average velocity of the car during the 80km trip?(assume it moves in positive x direction) b)What is the average speed? c)graph adn indicate how average ...
*Sunday, September 10, 2006 at 12:10pm by sara*

**physics**

A train 400 m long is moving on a straight track with a speed of 80.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.9 km/h. Assuming constant acceleration, determine how long the train blocked the crossing. ...
*Friday, February 3, 2012 at 2:54am by sally*

**physics**

A train 400 m long is moving on a straight track with a speed of 80.1 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.9 km/h. Assuming constant acceleration, determine how long the train blocked the crossing. ...
*Friday, February 3, 2012 at 5:26pm by sally*

**Physics**

A car accelerates uniformly from rest to a speed of 72.7 km/h (20.2m/s) in 11 second. the distance the car travels during this time.
*Tuesday, September 4, 2012 at 8:26pm by helen*

**Science**

A Family travels 200 km in two hours and 20 min .then they stop to eat lunch.After lunch they travel 300 km In Two 3 Hours and 40min.What is the average speed during the entire trip?
*Sunday, April 7, 2013 at 5:53pm by Edward*

**physics 111**

A bicycle travels 3.2 km due east in 0.10 h, then 5.6 km at 15.0° east of north in 0.11 h, and finally another 3.2 km due east in 0.10 h to reach its destination. The time lost in turning is negligible. What is the average velocity for the entire trip? i need to find the ...
*Friday, September 14, 2007 at 1:54am by bob*

**Math~Algebra**

11. A black racer snake travels 46.0 km in 20 hours. What is the speed in km/h?
*Sunday, May 25, 2008 at 8:23pm by Sahara*

**Urgent!!! Physics**

A meteor streaking through the night sky is located with radar. At point A its coordinates are (5.60 km, 1.25 km), and 1.12 s later its has moved to point B with coordinates (6.16 km, 0.900 km). A. Find the x component of its average velocity between A and B. (in Km/s) B. Find...
*Wednesday, January 26, 2011 at 9:51pm by andrea*

**physics**

A person takes a trip, driving with a constant speed of 93.5 km/h except for a 22.0 min rest stop. If the person's average speed is 68.0 km/h, how much time is spent on the trip and how far does the person travel? h km
*Sunday, January 22, 2012 at 11:23pm by marybeth*

**physics**

A 905 kg test car travels around a circular track with a circumference of 3.25 km. If the magnitude of the force that maintains the car's circular motion is 2140 N, what is the car's tangential speed?
*Thursday, November 18, 2010 at 5:19pm by Devon*

**Algebra 2**

A boat travels 60 km upstream and back again in 8 hours. If the speed of the boat is 16 km/h, what is the speed of the current?
*Sunday, October 18, 2009 at 7:29pm by Trisan*

**geometry**

A trailer driver left Miami at 15:45 and arrived at his destination 637.5 km away at 02:15 the next day. a. How long did the jpurney take? b. What was his average speed in km/h c. What was his average speed in ms^-1
*Tuesday, April 24, 2012 at 7:06pm by jodi*

**Algebra 2**

A boat travels 60 km upstream and back again in 8 hours. If the speed of the boat is 16 km/h, what is the speed of the current? Please Show Work
*Sunday, October 18, 2009 at 6:48pm by Trisan*

**unified science**

1) a bus drove 65 km/h. how far did it travel in 3 hours? 2) a bird fly at 8 m/s. how far can it travel in 10 seconds? 3) a snail can creep along at 5 cm/min. how can it travel in an hour? 4)an narrow flying at 94 m/s struck the target in 1.8 s. how far away was the target? 5...
*Sunday, November 25, 2012 at 5:23pm by witazza*

**PHYSICS**

A woman wantes to drive 83 km in 2 h. If she average 42 km/h for the first 1.27 h, what average velocity must she maintain for the remaining time in km/h
*Wednesday, February 19, 2014 at 1:10pm by Reem*

**phisecs**

A woman wantes to drive 82 km in 2 h. If she average 38 km/h for the first 1.47 h, what average velocity must she maintain for the remaining time in km/h?
*Wednesday, February 19, 2014 at 5:22pm by neon *

**Physics**

A speeder traveling at a constant speed of 102 km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (9 km/h)/s until it reaches its maximum speed of 146 km/h, which it maintains until it catches up with the speeder. How long does it take ...
*Saturday, January 28, 2012 at 11:49pm by Anon*

**Physics**

i got the first part of this quesion, please show me how to do the second part A truck driver travels 8 km ease, and then he turns around adn travels 3 km west. then he turns again and travels 12 km east. a. what distance has the driver travele that would be 23 km. just add b...
*Saturday, January 31, 2009 at 4:58pm by y912f*

**Physics**

Does the KE of a car change more when it accelerates from 27 km/h to 37 km/h or when it accelerates from 37 km/h to 47 km/h? 1. More information is needed. 2. No diﬀerence 3. From 37 km/h to 47 km/h 4. From 27 km/h to 37 km/h
*Monday, October 31, 2011 at 12:26am by Mathew*

**sociol student**

A woman wantes to drive 83 km in 2 h. If she average 42 km/h for the first 1.27 h, what average velocity must she maintain for the remaining time in km/h?
*Tuesday, February 18, 2014 at 12:20pm by sara*

**physics**

Velocity and displacement with uniform acceleration: 1. A car with an initial speed of 23.7 km/h accelerates at a uniform rate of 0.92 m/s^2 for 3.6 s. Find the final speed and the displacement of the car during this time. The final speed is 36 km/h. is this right? did i do ...
*Monday, September 25, 2006 at 8:10pm by anonymous*

**Physics**

please show me how to solve these: 1. Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straight highway? answer=3.00 h 2. How much time would Simpson save by increasing his average velocity to 56.0 km/h to...
*Friday, January 30, 2009 at 6:27pm by y912f*

**science**

a car travels a distance of 8 km from p to q then moves 6 km at right angle to PQ find its resultants 1.distance 2.displacement
*Wednesday, June 19, 2013 at 9:12am by sneh*

**physics**

A car traveling 59 km/h accelerates at the rate of 8 m/s2. How many seconds are required for the car to reach a speed of 90 km/h? ENTER NUMBERS ONLY (ONE DECIMAL PLACE). NO UNITS
*Monday, January 31, 2011 at 9:18pm by prabh*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.93 m/s2. What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 86 km/h to one of 98 km/h? Answer in units of m
*Sunday, November 11, 2012 at 3:26pm by Anne*

**physics**

You are arguing over a cell phone while trailing an unmarked police car by 25.0 m; both your car and the police car are traveling at 120 km/h. Your argument diverts your attention from the police car for 2.0 s (long enough for you to look at the phone and yell,“I won't do that...
*Thursday, September 5, 2013 at 6:46pm by katie*

**Physics**

125 km/hr *1 hr/3600 s * 1000m/km = 34.7 m/s the car travels t+1 seconds so the car goes d =34.7 * (t+1) = 34.7 t + 34.7 meters the trooper travels the same distance in t seconds d = 0 + 0t + (1/2)(2.7)t^2 so 34.7 t + 34.7 = 1.35 t^2 1.35 t^2 - 34.7 t - 34.7 = 0 solve ...
*Sunday, January 13, 2008 at 12:56pm by Damon*

**physics**

A car goes 10 km in 5 minutes when its average velocity is 80 km/hr. true or false
*Sunday, August 26, 2012 at 3:40pm by jassi*

**physics-7**

A spaceship travels 1220 km with a constant uniform acceleration. How much time is required for the acceleration if the spaceship increases its speed from 11.1 km/s to 11.7 km/s ?
*Wednesday, September 16, 2009 at 10:31pm by NoNo100*

**science**

recall that speed is distance travelled over time. thus we calculate the speed of each. let's also make sure that the units of speed for both are the same. Car: (convert first the units) 240 km * (1000 m /1 km) = 240000 m 2 hr * (3600 s / 1 hr) = 7200 s v = d/t v = 240000/7200...
*Monday, August 29, 2011 at 8:18pm by Jai*

**math**

a car travels 30 km due north and 40 km due east .how far is it from the startin point?
*Sunday, July 22, 2012 at 9:29pm by brandon quinones*

**Dynamics**

Car A is moving at a constant speed Va=75 km/h, while car C is moving at a constant speed Vc=42 km/h on a circular exit ramp with radius p=80m. Determine the velocity and acceleration of C relative to A.
*Sunday, January 30, 2011 at 10:41pm by Matt*

**physics**

A car acclerates uniformly from to a rest to a speed 23.7 km/h in 6.5 s.Find the car travels during the time.(Displacement with constant uniform accleration).My only problem is the conversion
*Thursday, September 13, 2012 at 9:22pm by A person*

**Physics**

A record for a marathon is 2.00h, 9.00min, 21.0 sec. If the average speed of a runner achieving this record is 5.436 m/s, what is the marathon distance? Answers: 15,878 km 7,761 km 42.2 km 26.2 km We're omnly two days into the new school year and I don't have all the formulas ...
*Monday, September 6, 2010 at 2:54pm by JulieAnne*

**physics **

A person travels by car from one city to another with diﬀerent constant speeds between pair of cities. She drives for 31.5 min at 89.6 km/h, 11.8 min at 101.8 km/h, and 58.5 min at 36.4 km/h, and spends 24.8 min eating lunch and buying gas. Find the distance between the...
*Sunday, September 2, 2012 at 5:04pm by thomas*

**HELPPPP**

A car is driven at a constant speed of 77 km/h down a road. The car's engine delivers 49 kW of power. Calculate the average force that is resisting the motion of the car.
*Tuesday, January 4, 2011 at 9:31pm by HELP PLEAS*

**physics**

A car is driven at a constant speed of 79 km/h down a road. The car's engine delivers 47 kW of power. Calculate the average force that is resisting the motion of the car.
*Monday, December 12, 2011 at 12:44am by Anonymous*

**Physics**

A car is driven at a constant speed of 85 km/h down a road. The car's engine delivers 49.2 kW of power. Calculate the average force that is resisting the motion of the car.
*Wednesday, March 21, 2012 at 3:59pm by Becky*

**Math - Alg**

1. The volume V of a right circular cylinder is given as V = pir^2h, where r is the radius of the base and h is the height of the cylinder. a. Express the height of the cylinder in terms of iuts volume and radius of the base. b. Translate the equation above into a verbal ...
*Sunday, November 17, 2013 at 9:25pm by Marie Pierre*

**zachary **

A car travels in a straight line for 5.1 h at a constant speed of 94 km/h . What is its acceleration?
*Sunday, January 26, 2014 at 5:22pm by kee*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.82 m/s2. What is the magnitude of the car’s displace- ment as it accelerates uniformly from a speed of 85 km/h to one of 95 km/h? Answer in units of m.
*Tuesday, March 15, 2011 at 10:51pm by maria*

**Physics**

A car travels 30 km north in 25 min. and 40 km east in 35 min. What is the total distance traveled?
*Thursday, June 13, 2013 at 9:11am by Isis*

**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**

let the total distance be x km her speed for first part = (1/5)x/1 km/h = x/5 km/h speed for second part = 180/4 = 45 mph remaining distance = x - (1)(x/5) = 4x/5 so, 4(45) = 4x/5 180 = 4x/5 4x = 900 x = 225 the total trip was 225 km her speed in the first part = x/5 = 225/5...
*Monday, March 26, 2012 at 9:32am by Reiny*

**SCIENCE**

WHAT IS THE AVERAGE SPEED [KM/H] FOR A CAR JOURNEY OF 120 KM THAT BEGAN AT 9:30 A.M. AND FINISHED AT 11:30 A.M.? HINT HOW MANY HOURS ARE BETWEEN 9:30A.M. AND 11:30A.M
*Sunday, October 16, 2011 at 5:04pm by EDUARDO*

**science**

A race car travels northward on a straight, level track at a constant speed travels 0.756 km in 18.0 s. The return trip over the same track is made in 23.0 s
*Sunday, September 18, 2011 at 10:29pm by tina*

**science**

In a dream you're in a car traveling at 50 km/h and you bump into another car traveling toward you at 48 km/h. The speed of impact is
*Saturday, October 26, 2013 at 7:31pm by josh*

**Physics**

A car travels due east with a speed of 50.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth.The traces of the rain on the windows of the car make an angle of 60 degrees with the vertical. Find the velocity of the rain with respect to (a) ...
*Tuesday, September 10, 2013 at 8:53pm by Cassie*

**physics**

a truck travels at 90km/hr W for 10 min. then at 110 km/ hr for 38 km what was the trucks average velocity
*Thursday, January 17, 2013 at 5:59pm by Anonymous*

**physics**

In a visit to the nation's capital, a foreign head of state travels from (−3.0, −4.0) km to (4.0, 7.0) km. She then travels with a displacement of (−5.0, -3.8) km. Calculate the her total displacement over the course of the trip. ANSWER SHOULD BE IN FORM ( , ).
*Sunday, December 19, 2010 at 3:38pm by mel*

**Physics **

A train traveling at a speed of 110 km/h uniformly decelerates for 20 seconds. During that time it travels 450m. A) What is the acceleration? (m/s^2) B) What is its speed after deceleration? (km/h) A ANS = -.805m/s^2 B ANS = 52km s = 450m t = 20 seconds u = 110km/h*1000m/km /...
*Saturday, January 11, 2014 at 10:29pm by Danny*

**Physics**

A car travels at a constant speed around a circular track whose radius is 2.5 km. The car goes once around the track in 430 s. What is the magnitude of the centripetal acceleration of the car? m/s2
*Wednesday, April 2, 2008 at 4:44pm by Will G*

**Physics**

A car travels at a constant speed around a circular track whose radius is 2.5 km. The car goes once around the track in 430 s. What is the magnitude of the centripetal acceleration of the car?
*Wednesday, April 2, 2008 at 11:44pm by Tasha*

**physics**

A car travels at a constant speed around a circular track whose radius is 2.8 km. The car goes once around the track in 300 s. What is the magnitude of the centripetal acceleration of the car?
*Sunday, July 18, 2010 at 10:52pm by Anonymous*

**PHYSICS**

A car travels at a constant speed around a circular track whose radius is 3.1 km. The car goes once around the track in 280 s. What is the magnitude of the centripetal acceleration of the car?
*Thursday, September 30, 2010 at 8:31pm by Joshua*

**Physics**

A car travels at a constant speed around a circular track whose radius is 2.9 km. The car goes once around the track in 380 s. What is the magnitude of the centripetal acceleration of the car?
*Saturday, October 23, 2010 at 12:33pm by Angela *

**maths**

the police officer also gathered data on the speedsx, in kilometers per hour (km/h) of some cars as they drove down the hill towards her car. the speed limit is 50 km/h. Analysis of the results showed that the speeds of cars were normally distributed with a mean speed of 56 km...
*Sunday, August 26, 2007 at 12:26am by kate*

**physics**

A motorcycle officer hidden at an intersection observes a car driven by an oblivious driver who ignores a stop sign and continues through the intersection at constant speed. The police officer takes off in pursuit 1.98 s after the car has passed the stop sign. She accelerates ...
*Thursday, August 18, 2011 at 2:17am by laura*

**physics help!**

The tires of a car make 63 revolutions as the car reduces its speed uniformly from 94.0 km/h to 58.0 km/h. The tires have a diameter of 0.88 m. What was the angular acceleration of each tire? And If the car continues to decelerate at this rate, how much more time is required ...
*Thursday, March 25, 2010 at 10:35am by Anonymous*

**Math**

The distance to the nearest 100000 km from Earth to the moon is given as 400000 km.The average speed to the nearest 500 km/h of a rocket to the moon is given as 3500 km/h.Calculate the greatest and least time it could take the rocket to reach the moon.
*Friday, March 30, 2012 at 1:00am by Friesam*

**science**

How long does it take the ball in problem 5 to travel 15 meters after being played? Neglect the gravitational effect, and suppose the ball travels along a straight line and assume a speed of 24 m/s. A racecar driver steps on the gas, and his car travels 16 meters in 2 seconds...
*Monday, June 17, 2013 at 7:24am by bittubeniwal*

**Calculus**

A pilot wishes to reach an airport 350 Km due east from his present position. The wind is blowing from N25degreesE with a speed of 80 Km/h and the planes airspeed is 400 Km/h. What ground speed and what heading should the pilot steer to reach the airport? How many minutes will...
*Tuesday, May 4, 2010 at 5:56pm by Ariza*

**MATH**

1. Terre Haute to Indianapolis to Bloomington measures 3 cm on the map. What is the actual distance? 100 km 150 km 200 km 250 km 2. Fort Wayne to Richmond to New Albany measures 6 cm on the map. What is the actual distance? (1 point) 300 km 250 km 350 km 400 km 3. If your ...
*Friday, December 7, 2012 at 2:58pm by Help!!!!!!!!!!!!!! Fast its urgent Please!!!!!!!!!*

**science**

The bus driver's manager wants to know the average speed at which the driver was actually driving the bus that day while he was on the road. DON'T include the rest stops. A bus driver runs a round trip route between 3 cities. It takes 5 hrs for the 400 km trip to the first ...
*Tuesday, April 27, 2010 at 11:01am by Judy*

**science**

The bus driver's manager wants to know the average speed at which the driver was actually driving the bus that day while he was on the road. DON'T include the rest stops. A bus driver runs a round trip route between 3 cities. It takes 5 hrs for the 400 km trip to the first ...
*Tuesday, April 27, 2010 at 11:03am by Judy*

**physics**

(a) It takes the bird 3.6/23.1 = 0.1558 h to teach the finish line. The runner is then 2.4 km from the finish line. They meet again 1.8 km from the finish line, since the bird travels 3/4 of the 2.4 km and the man 1/4. The total distance travelled by the bird is 3.6 + 1.8 = 5....
*Wednesday, December 29, 2010 at 12:49am by drwls*

**physics**

A car travels at a constant speed around a circular track whose radius is 2.60 km. The car goes once around the track in 344 s. What is the magnitude of the centripetal acceleration of the car?
*Monday, February 13, 2012 at 9:00pm by Joe*

**physics**

A car travels at a constant speed around a circular track whose radius is 2.1 km. The car goes once around the track in 320 s. What is the magnitude of the centripetal acceleration of the car? 1 m/s2
*Tuesday, November 6, 2012 at 10:23am by Anonymous*

**physics**

Distance = speed * time If John travels 100 km at 50 km/h, it takes him 100/50 = 2 hours. So if the train travels 1620 m at 36 m/s, how long does it take to make that distance?
*Thursday, September 17, 2009 at 9:41pm by MathMate*

**Physics**

To stop a car, first you require a certain reaction time to begin braking. Then the car slows down at a constant rate. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 85.0 km/h, and 24.4 m when the initial speed is ...
*Wednesday, March 5, 2008 at 7:12pm by Lance*

**physics**

choose the correct answer and why? a car starts from rest and reaches speed of 80 km/h in 16 s the average acceleration of the car is: a\ 0.7 m/s*2 b\1.4 m/s*2 c\5 m/s*2
*Thursday, February 20, 2014 at 12:27pm by Reem*

**physics**

HI. Can someone please help me with this question. Two identical cars hit each other and lock bumpers. In each of the following cases, what are the speeds of the cars immediately after coupling bumpers? (a) A car moving with a speed of 90 km/h approaches a stationary car; (b) ...
*Thursday, December 18, 2008 at 5:41pm by bill*

**Physics **

A car travels 20.2 km due north and then 31.3 km in a direction φ = 61.2◦ west of north. Find the magnitude of the car’s resultant displacement. Then Calculate the direction of the car’s resultant displacement, measured counterclockwise from the northerly direction.
*Monday, January 28, 2013 at 2:10pm by Aurora *

**physics**

A car that decreases its speed from 100 km/h to 20 km/h undergoes ______ acceleration.
*Monday, November 1, 2010 at 4:12pm by Janis*

**physics**

A car is driven 110 km west and then 25 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)? ...km ... degrees south of west
*Sunday, March 20, 2011 at 3:49pm by Jessica*

**physics**

part 1 Simpson drives his car with an average veloc- ity of 47.5 km/h to the east. How long will it take him to drive 137 km on a straight highway? Answer in units of h part 2 How much time would Simpson save by in- creasing his average velocity to 105 km/h to the east? Answer...
*Tuesday, September 6, 2011 at 9:45pm by ashley*

**physics**

to qualify for a race, a car must average 350 km/hr for four laps. If a driver averages 285 km/hr for the first two laps, what average speed must be achieved for the final two laps in order to qualify?
*Tuesday, September 25, 2012 at 8:54pm by mary otto*

**Trigonometry**

A ship travels S 62 E and for 48 km and then turns and travels N 28 E for 37 km.
*Thursday, November 3, 2011 at 10:22am by Shiann*

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