Saturday

April 19, 2014

April 19, 2014

Number of results: 24,971

**Physics**

A racecar driver in an 825-kg car accelerates from rest to a velocity of 21.5 m/s in 0.55 s. What is the net force acting on the car? I found out using A=v/t that the horizontal acceleration is 39.1 m/s^2. My problem now is this... Is the net force just F=ma? Or do I have to ...
*Saturday, June 20, 2009 at 8:55pm by Hannah*

**Physics**

A 2.0×103 kg car accelerates from rest under the action of two forces. One is a forward force of 1153 N provided by traction between the wheels and the road. The other is a 939 N resistive force due to various frictional forces. How far must the car travel for its speed to ...
*Saturday, January 22, 2011 at 8:27pm by Sangita*

**physics**

A particle accelerates from rest at 3.1 m/s2. What is its speed 5.5 s after the particle starts moving? Answer in units of m/s.
*Sunday, November 7, 2010 at 6:27pm by nohbdy*

**physics**

a body starts from rest and acquire avelosity V in time T. The instantaneous power developed to the body is proportionalto
*Sunday, October 2, 2011 at 9:49pm by pradhan*

**Physics**

The impulse given to a ball with mass of 4 kg is 16 N s. If the ball starts from rest, what is its final velocity?
*Tuesday, April 1, 2014 at 4:55pm by Anonymous*

**physics**

A 1500 kg car at rest rolls down a hill inclined at 10 degrees with the horizontal. A 400 N friction force opposes its motion on the inclined plane and a 600 N on the horizontal surface a) how fast will it be moving at point B b) how far from point C will it travel before ...
*Tuesday, January 21, 2014 at 8:35am by joseph*

**physics**

A skier starts from rest at the top of a hill that is inclined at 11.0° with respect to the horizontal. The hillside is 190 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient of friction is ...
*Tuesday, October 11, 2011 at 6:07pm by Anonymous*

**physics**

A body starting from rest, travels a distance of 45 meters during the fifth second of motion.Calculate the acceleration of the body
*Monday, September 14, 2009 at 9:25am by Siphelo*

**physics**

Zephram is on roller blades on a hill. He starts from rest and skates for 5.5s accelerating uniformly at 3.5m/s2. Show that the distance traveled is 53m.
*Saturday, February 12, 2011 at 5:42pm by Daisha*

**Physics**

A 1200-kg frictionless roller coaster starts from rest at a height of 24 m. What is its kinetic energy when it goes over a spot that is 12 m high?
*Thursday, May 10, 2012 at 7:21pm by Bob *

**physics**

determine the acceleration for a jet taking off on a run way as it starts from rest and reaches a velocity of 50m/s over a period of 10s
*Thursday, September 20, 2012 at 1:26pm by damarcus foggle*

**Physics help please**

Twins who are 19.0 years of age leave the earth and travel to a distant planet 12.0 light-years away. Assume that the planet and earth are at rest with respect to each other. The twins depart at the same time on different spaceships. One twin travels at a speed of 0.854c, and ...
*Friday, April 6, 2012 at 1:18pm by Jim*

**Physics Question**

Twins who are 19.0 years of age leave the earth and travel to a distant planet 12.0 light-years away. Assume that the planet and earth are at rest with respect to each other. The twins depart at the same time on different spaceships. One twin travels at a speed of 0.854c, and ...
*Friday, April 6, 2012 at 4:32pm by Anonymous*

**Physics**

Car A is traveling at 84 km/h while Car B is traveling at 58 km/h. What is the relative velocity of Car A to Car B if they both are traveling in the same direction? What is the relative velocity of Car A to Car B if they are headed towards each other?
*Saturday, August 25, 2007 at 7:03pm by Jayd*

**Physics**

Car A is traveling at 84 km/h while Car B is traveling at 58 km/h. What is the relative velocity of Car A to Car B if they both are traveling in the same direction? What is the relative velocity of Car A to Car B if they are headed towards each other?
*Sunday, August 26, 2007 at 11:23am by Jayd*

**PHYSICS (what is a dynamic equation????)**

A car of mass Mc is connected to mass m2 by a string. The string passes over a solid cylindrical pulley, which has a frictionless bearing, of radius R and mass M. when the system is released from rest the string doesn't slip, the car moves down the incline, and m2 moves upward...
*Monday, December 3, 2007 at 9:02am by ~christina~*

**physics**

A 4.6 kg block starts at rest and slides a distance d down a frictionless 31.0° incline, where it runs into a spring. The block slides an additional 24.0 cm before it is brought to rest momentarily by compressing the spring, whose spring constant is 421 N/m. What is the value ...
*Wednesday, March 28, 2012 at 12:43pm by please help:)*

**science**

you push a 12.5 kg cart with a force of 14 N if the cart starts from rest how far does it move in 3 seconds?
*Wednesday, November 2, 2011 at 4:42pm by Eve*

**physics**

A skier starts from rest at the top of a hill that is inclined 18.5° with respect to the horizontal. The hillside is 200 m long, and the coefficient of friction between snow and skis is μk = 0.0500. At the bottom of the hill, the snow is level and the coefficient of ...
*Monday, October 25, 2010 at 11:58am by Anonymous*

**Physics**

A car moving with a constant acceleration covers the distance between two points 60 m apart in 6.0 s. Its velocity as it passes the second point is 17 m/s. a) What was the speed at the first point? b) What is the constant acceleration? c) How far behind the first point was the...
*Tuesday, September 4, 2007 at 7:59pm by Jayd*

**physics**

A car moving with a constant acceleration covers the distance between two points 80 m apart in 8.0 s. Its velocity as it passes the second point is 15 m/s. (a) What was the speed at the first point? (b) What is the constant acceleration? (c) How far behind the first point was ...
*Saturday, October 22, 2011 at 10:39pm by Ruby*

**Algebra 1**

4. Two consultants were hired by a company. The total consultant fees were $18,500. If one consultant had earned $500 less, each consultant would have been paid the same. How much was each consultant paid? 6. Five cars in a race all finished within 8 seconds of each other. Car...
*Monday, October 28, 2013 at 7:38pm by CJ*

**Physics**

A car, of total mass 1200 kg, is travelling at 90 km/h and strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.80 m. (i)What was the average acceleration of the driver during the collision? Express the answer in terms of “g’s”. (...
*Tuesday, July 20, 2010 at 3:48pm by Oisin*

**Physics**

A car, of total mass 1200 kg, is travelling at 90 km/h and strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.80 m. (i)What was the average acceleration of the driver during the collision? Express the answer in terms of “g’s”. (...
*Tuesday, July 20, 2010 at 4:08pm by Oisin*

**physics**

A thief is trying to escape from a parking garage after completing a robbery, and the thief's car is speeding (v = 14 m/s) toward the door of the parking garage (see figure). When the thief is L = 31 m from the door, a police officer flips a switch to close the garage door. ...
*Friday, September 16, 2011 at 9:03pm by simi*

**PHYSICS-URGENT HELP**

A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns to the police car with a frequency of 1250 Hz. The police car is right next to the highway, so the moving car is traveling either directly towards or directly away ...
*Friday, July 29, 2011 at 3:03pm by Brit*

**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. My ...
*Sunday, March 18, 2007 at 6:51pm by Aletha*

**Physics**

A man driving his car into 20.0 ft garage with a velocity of 20.0mi/h applies the brakes, producing a constant deceleration. Find the smallest deceleration necessary to avoid striking the back wall of the garage. And find how many seconds it takes for the car to come to rest
*Saturday, February 22, 2014 at 9:27am by Jish*

**Physics**

A man driving his car into 20.0 ft garage with a velocity of 20.0mi/h applies the brakes, producing a constant deceleration. Find the smallest deceleration necessary to avoid striking the back wall of the garage. And find how many seconds it takes for the car to come to rest
*Sunday, February 23, 2014 at 9:59am by Jish*

**Word Problem Maximizing A Bonus**

Pauline Wong spends 4 hours selling a used car and 6 hours selling a new car. She works no more than 40 hours per week. In order to receive a bonus, she must sell at least one used car and four new cars each week. In that case, she recives a bonus of $180.00 for each used car ...
*Friday, July 22, 2005 at 1:23am by GetYourLeash*

**math**

A man travels 4km due north,then travels 6km due east and further travels 4km due north .how far he is from the starting point.
*Monday, April 22, 2013 at 3:37am by nripesh*

**Physics**

Car A is moving at a constant speed of 10.0 m/s and passes Car B which is at rest. 10 seconds after, the latter follows with an acceleration of 0.5 m/s2. Determine the distance that the latter has to travel before it overtakes the former. does it require quadratic formula? Oh ...
*Sunday, August 12, 2012 at 12:22pm by Anna*

**physics - - - **

A 12.0g bullet is accelerating from rest to a speed of 700m/s as it travels 20.0cm in a gun barrel. How large is it's accelerating force ?
*Tuesday, November 2, 2010 at 6:35pm by Reema*

**physics**

An electron, starting from rest and moving with a constant acceleration, travels 4.7 cm in 5.2 ms. What is the magnitude of this acceleration? Answer in units of km/s2
*Tuesday, September 13, 2011 at 12:34pm by naia*

**Physics**

An electron, starting from rest and moving with a constant acceleration, travels 5.5 cm in 10 ms. What is the magnitude of this acceleration? Answer in units of km/s
*Monday, October 3, 2011 at 5:49pm by Anonymous*

**physics**

a jet plane traveling at +87 m/s lands on a runway and comes to rest in 11 s. a)Calculate its uniform acceleration b)Calculate the distance it travels
*Tuesday, November 6, 2012 at 8:32pm by kayla*

**physics**

Two cars start from rest at the same location and at the same instant and race along a straight track. Car A accelerates at 6.6 fps2 to a speed of 90 mph and then runs at this constant speed. Car B accelerates at 4.4 fps2 to a speed of 96 mph and then runs a a constant speed...
*Saturday, January 22, 2011 at 2:06pm by David*

**physics**

A car moving with a constant acceleration covers the distance between two points 80 m apart in 8.0 s. Its velocity as it passes the second point is 14 m/s. (a) What was the speed at the first point? 1 m/s (b) What is the constant acceleration? 2 m/s2 (c) How far behind the ...
*Friday, September 2, 2011 at 8:23pm by Erin*

**physics**

Here is the problem and answers. how do i reach the answer? A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 325 km/h in a semicircular arc with a radius of 198 m. Determine the tangential acceleration of the car when it is halfway ...
*Monday, January 17, 2011 at 9:48pm by hopsy*

**physics, dynamics**

Two cars are traveling along a straight road. Car a maintains a constant speed of 89 km/hr and car b maintains a constant speed of 119 km/hr. at t=0 car b is behind 38km from car a. How far will car a travel from t =0 before it is overtaken by car b. how long from t=0 will it ...
*Thursday, January 13, 2011 at 10:39pm by Anonymous*

**physics repost**

A car of mass 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to rest over a distance of 79.0 m. Calculate the retarding force acting on the car. same as before just posting again so you wont have to scroll. heres my work KE=1/2*m*v^2 KE=521360...
*Wednesday, April 16, 2008 at 8:46pm by Anonymous*

**Physics**

A cyclist starts from rest and pedals so that the wheels make 7.7 revolutions in the first 5.1 s. What is the angular acceleration of the wheels (assumed constant)?
*Monday, March 8, 2010 at 5:18pm by Max*

**physics**

a 2 kg rabbit starts from rest and is moving at 6 m/s after 3 seconds. What force must the rabbit cause to makes this change in speed?
*Tuesday, February 22, 2011 at 3:12pm by becky*

**phys6**

A cyclist starts from rest and pedals so that the wheels make 8.1 revolutions in the first 5.4 s. What is the angular acceleration of the wheels (assumed constant)?
*Monday, February 20, 2012 at 3:42pm by opp*

**physics**

a motorized scooter starts from rest and accelerates for 4 s at 2 m/s2. it continues at a constant speed for 6 s . What is the scooter's average velocity for the interval 0-4 s ?
*Monday, March 5, 2012 at 8:02am by blue*

**Physics**

A motor cycle starts from rest and reaches a speed of 6m/s after travelling with uniform acceleration for 3s. What is his acceleration?
*Sunday, October 14, 2012 at 3:31pm by Jasmine*

**physics**

An airplane starts at rest and accelerates down the runway for 20s. At he end of the runway, it's velocity is 80 m/a north. What is its acceleration?
*Monday, February 18, 2013 at 8:27am by Kaylee*

**math riddle ALGEBRA WITH PIZZAZZ**

What is the answer to did you hear about?? It starts off like the cross eyed college professor who seemed but I can't figure out the rest
*Sunday, April 6, 2008 at 5:28pm by Jessica*

**physics math**

the acceleration of a car is 2m/s^2 and another car has constant velocity of 35m/s.what time the first car overtake the car with constant velocity of the first car? draw and show solution
*Monday, December 10, 2012 at 12:57am by Hshdhdhdhdjdjdjdjjsjshsgshshs*

**science**

calculate the distance an object travels if its speed is 60km/h and it travels for 6h
*Sunday, January 9, 2011 at 11:57pm by fg*

**Physics**

A skier starts from rest at the top of a hill that is inclined at 12.0° with the horizontal. The hillside is 180.0 m long, and the coefficient of friction between the snow and the skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient of friction is ...
*Sunday, March 18, 2012 at 12:19pm by smh*

**physics **

How would I graph a collision. i.e if I have a problem A 12,000 kg railroad car traveling at a speed of 19 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? What would my x axis be and what would...
*Monday, January 25, 2010 at 1:47am by Brendan *

**math**

A circular racetrack has a diameter of 200 meters. What is the approximate distance a car travels in meters for three full revolutions around the track? use 3.14 for pie.
*Sunday, November 21, 2010 at 8:09pm by Abby*

**physics**

What is the average speed of a car that travels 210 m in 25 second, then speeds up to 0.47 km in 20 second and then slows down to 150 m in 0.50 minute?
*Wednesday, April 10, 2013 at 8:29pm by Doris*

**Physics Help, Please! **

When a car goes around a curve (without skidding), on a level road, Select one: a. no friction force is needed because the car simply follows the road. b. the friction force of the road on the car increases when the car’s speed decreases. c. the friction force of the road on ...
*Sunday, November 4, 2012 at 1:48pm by Michael *

**Physics**

A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly at a rate of 0.8 m/s2 for 4.4 seconds. It then continues at a constant speed for 13.5 seconds, before getting tired and slowing down with constant ...
*Monday, August 27, 2012 at 8:29pm by David*

**math**

a carload of fraternity brothers leave their house for a long weekend trip. three hours later a second carload of brothers leaves the same house and travels the same path. if the second care drives and average of 15 mph faster than the first, what is the average speed of eavh ...
*Monday, September 9, 2013 at 4:16pm by Haley*

**Physics**

A 24-ton freight car rolls along a straight track with a speed of 10mph. A 2.0 ton automobile falling vertically lands on the freight car from above. a) what is the speed of the freight car after the car lands on it? b) the car then rolls sideways off the freight car. What is ...
*Thursday, April 26, 2012 at 10:26pm by Sarah*

**physics**

A 1.54×10 3 kg car accelerates uniformly from rest to 12.7 m/s in 2.97 s. What is the work done on the car in this time interval? Answer in units of J 002 (part 2 of 2) 10.0 points What is the power delivered by the engine in this time interval? Answer in units of W
*Thursday, November 8, 2012 at 8:54pm by Anonymous*

**Science**

True or false: light travels in straight lines if the medium it travels doesn't change
*Wednesday, September 26, 2012 at 11:20pm by Sam*

**physics**

he travels 120m up the slope That means he travels 120 cos15° horizontally
*Monday, May 20, 2013 at 2:20pm by Steve*

**Science**

Which one is different in the catergories? Plus, could you calssify the rest in the group, without the circled one? A. wheelbarrow B. wagon C. car -- --- D. shopping cart -- -------- ---- I think that the answer is D. shopping cart whing is uderlined or C. car. also, could ...
*Thursday, October 21, 2010 at 6:34pm by Jacytiopa*

**Physics **

A dragster travels 1/4 mile in 6.1 seconds. Assuming the acceleration is constant and the dragster is initially at rest, what is the velocity when it crosses the finish line?plese explain.
*Sunday, August 26, 2012 at 2:31pm by Cin*

**Physics**

A Honda Civic and Lincoln Town Car are initially at rest on a horizontal parking lot at the edge of steep cliff. The Town Car has twice as much mass as the Civic. Equal constant forces are applied to each car and they accelerate across equal distances (ignore effects of ...
*Thursday, December 3, 2009 at 7:49pm by Hannah*

**Maths**

At 9.30 a.m., a car left town X for town Y at a speed of 60km/h for the whole journey. At 11 a.m., a lorry started from town Y and travelled towards town X. The speed of the lorry remained the same until it passed the car at 12.30 p.m. The lorry passed the car at midpoint ...
*Monday, December 30, 2013 at 6:09pm by Sarah*

**Math**

miles truck drove before car left rest stop = 45 * 1/4 miles an hour at which the car is catching up : 60-45 = 15 mph how long to drive 45/4 miles at 15 mph?
*Tuesday, February 12, 2013 at 6:03pm by Knights*

**Physics**

A wire is frictionless between points A and B and rough between B and C. A is 5m above the ground, B is zero, and C is 2m above the ground. The 0.400kg bead starts from rest at A. If the bead comes to rest at C, find the loss in mechanical energy as it goes from B to C. I can'...
*Sunday, November 6, 2011 at 12:10am by Katie*

**phy**

a car rolls down an incline starting from rest A graph
*Tuesday, September 20, 2011 at 5:51pm by ana*

**physics**

a race car accelerates from rest at +7.2 m/s^2 for 4.5 s. How fast will it be going at the of that time ??
*Tuesday, November 6, 2012 at 7:16pm by ashley*

**College Physics**

A cyclist starts from rest and pedals so that the wheels make 7.7 revolutions in the first 5.1 s. What is the angular acceleration of the wheels (assumed constant)?
*Friday, September 25, 2009 at 5:37pm by Megan*

**Physics**

A skateboard rider starts from rest and maintains a constant acceleration of +0.50 m/s squared for 8.4 s. What is the rider's displacement during this time?
*Tuesday, March 23, 2010 at 10:54am by Lamar McKnight*

**physics**

A skateboard rider starts from rest and maintains a constant acceleration of 10.50 m/s2 for 8.4 s. what is the rider's displacement during this time?
*Sunday, February 7, 2010 at 3:47pm by Anonymous*

**physics**

a force of 890n acts on a body that weighs 265n if the body starts from rest, how fast will it be going after it has moved 3.00m
*Thursday, February 13, 2014 at 9:59am by lml*

**Don't get scared when you hear the word Physics!**

A 1500 kg car traveling at 16.0 m/s to the south collides with a 5100 kg truck that is initially at rest at a stoplight. The car and truck stick together and move together after the collision. What is the final velocity of the two-vehicle mass? Answer in units of m/s
*Thursday, January 17, 2013 at 8:29pm by Just help please. Homework due in 4 hours *

**Algebra**

John's insurance company will replace his car if repair costs exceed 80% of the car's value. The car recently sustained $8000 worth of damage, but it was not replaced. What was the value of his car?
*Thursday, January 21, 2010 at 9:31pm by jj*

**Physics**

A toy car runs off the edge of a table that is 1.357 m high. If the car lands 0.442 m from the base of the table, (a) how long does it take for the car to fall? s (b) what is the horizontal velocity of the car? m/s
*Wednesday, October 12, 2011 at 6:34pm by Zachy D*

**physics**

a toy car runs off the edge of a table that is 1.225 m high. if the car lands .400 m from the base of the table (A) how long does it take for the car to fall and (B) what is the horizontal velocity of the car?
*Sunday, September 30, 2012 at 4:03pm by Bob*

**DYNAMICS**

A car has an initial speed of 25m/s and a constant deceleration of 3m/s^2. Determine thewvelocity of the car when t=4s. What is the displacement of the car during the 4-s time interval? How much time is needed to stop the car?
*Sunday, February 17, 2013 at 8:18pm by HELP*

**MATH**

A CAR TRAVELS 432 KM ON 48 LITERS OF PETROL . HOW FAR WOULD IT TRAVEL ON 28 LITERS OF PETROL
*Wednesday, July 6, 2011 at 8:10am by ANKIT*

**Physics**

A car travels at 30 mph can stop in 100 feet. What distance might it stop in when traveling at 70 mph?
*Sunday, November 20, 2011 at 4:07pm by bz*

**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*

**dynamics**

120km/hr = 33.333 m/s so, at time t, the car has gone 33.333 t meters how long does the cop take to achieve 150km/hr? That's 41.666 m/s, so at 6m/s^2 it takes 6.9444 seconds. During the 6.9444 seconds, he travels 1/2 (6)(6.9444)^2 = 144.67 m So, the cop overtakes the car when ...
*Monday, April 1, 2013 at 8:04am by Steve*

**math**

A car travels at an average speed of 36 kilometers per hour. Write and solve an equation to predict how many hours if will take travel 432kph. It if continues of this speed.
*Tuesday, June 21, 2011 at 10:08am by jewel padilla*

**Physics**

A circular automobile racetrack is banked at an angle theta such that no friction between road and tires is required when a car travels at 28.0 m/s. If the radius of the track is 390 m, determine theta .
*Saturday, February 11, 2012 at 7:07pm by J*

**physics**

A solid disk of radius 0.20 m and a mass of 1.0 kg starts at rest and then speeds up to 100 rad/s in 10s. What is the torque that produces this rotational acceleration?
*Tuesday, November 6, 2012 at 8:28am by theresa gibson*

**physics**

A solid disk of radius 0.20 m and a mass of 1.0 kg starts at rest and then speeds up to 100 rad/s in 10s. What is the torque that produces this rotational acceleration?
*Tuesday, November 6, 2012 at 8:46am by theresa gibson*

**Physics**

An airplane starts from rest and accelerates at a constant rate if 3.00m/s^2 for 30.0s before leaving the ground. A)How far did it move? B) how fast was it going when it took off?
*Wednesday, January 22, 2014 at 8:32pm by Sandara*

**PHYSICS**

1.Suppose you wish to whirl a pail full of water in a vertical circle without spilling any of its contents. If your arm is 0.99 m long (from shoulder to fist) and the distance from the handle to the surface of the water is 20.5 cm, what minimum speed is required? 2.A 1010 kg ...
*Thursday, October 7, 2010 at 12:00am by mike*

**#2**

A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 335 km/h in a semicircular arc with a radius of 190 m. Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration. (in...
*Monday, October 9, 2006 at 8:35pm by Britt Pogue*

**physics**

A car, mass - 1950 kg, accelerates at +2.33 m/s (squared). Find the magnitude of the normal force acting on the car. If later, when the car is cruising at 26.5 m/s, the driver applies a force of magnitude 10,000 N to stop the car. What is the distance it takes for the car to ...
*Sunday, February 12, 2012 at 8:06am by jane*

**Physics**

Imagine a fender bender between a large truck and a small car. During the impact, Choose one answer. a. the truck exerts a greater amount of force on the car than the car exerts on the truck b. the car exerts a greater amount of force on the truck than the truck exerts on the ...
*Friday, February 8, 2013 at 2:59pm by Kirk*

**prealgerbra**

A car travels at a speed of 44 feet per second. What is the speed in miles per hour? Show all work
*Tuesday, January 24, 2012 at 8:27pm by steph*

**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*

**Physics**

A 1500 kg truck travels at 30m/s. It faces a force of 400 N from air resistance, what is the car's average power output? Is the answer 675 kw?If not please help me in any way you can,by showing the formula you used.
*Wednesday, March 4, 2009 at 11:45pm by Harold*

**math -- Calc**

1. A car travels 20 mi/hr for 2 hours and then 30 mi/hr for 3 hours. a) For 0<t<2 let c(t) be the distance the car has traveled in miles from time 0 to time t, where t is measured in hours. Find c(t). b) Extend your function c(t) from part (a) to the time period 2< =t...
*Sunday, January 20, 2008 at 3:21pm by Veronica*

**calculus -- PLEASE HELP!**

1. A car travels 20 mi/hr for 2 hours and then 30 mi/hr for 3 hours. a) For 0<t<2 let c(t) be the distance the car has traveled in miles from time 0 to time t, where t is measured in hours. Find c(t). b) Extend your function c(t) from part (a) to the time period 2 <= ...
*Monday, January 21, 2008 at 3:37am by anonymous*

**PreCal**

In a grocery store, you push a 14.5 kg shopping cart with a force of 12 N. If the cart starts from rest, how far does it move in 3 sec?
*Tuesday, October 9, 2012 at 6:22pm by Gabi*

**Physics**

F=6kt This force acts on a particle of mass "m" that moves along a line. If the particle starts from rest, determine its velocity and position at time t.
*Monday, November 12, 2012 at 2:18pm by shawn*

**physics**

a block of a mass starts from rest and slides down a surface which correspnds to a quarter of a circle. if the curved surface is smooth, what is the speed at the bottom?
*Monday, April 22, 2013 at 7:04am by mojalefa*

**math**

a car depreciates in by avalue of $1000 per year. The original value of the car is $30,000. Let V(x) be the value of the car in x years. Write the linear function that represent the value of the car in x years. what will be the value of the car after 7 years?
*Monday, June 17, 2013 at 4:35pm by kirk*

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