Friday

September 30, 2016
Number of results: 46,693

**College Physics**

A car initially traveling northeast (45° N of E) at 28.3 m/s takes 6.0 s to turn to the east. After the turn, the car is traveling due east at 20.0 m/s. What is the value and direction of the change in velocity?

*September 19, 2010 by Angela*

**Physics**

How fast would a 9-g fly have to be traveling to slow a 1790-kg car traveling at 58 mph by 4 mph if the fly hit the car in a totally inelastic head-on collision?

*June 6, 2012 by Emily*

**physics**

How fast would a 4-g fly have to be traveling to slow a 1890-kg car traveling at 51 mph by 6 mph if the fly hit the car in a totally inelastic head-on collision?

*March 5, 2013 by Michael*

**physics**

If there is a constant towing force of 1.5 kN, how long would it take a tow truck to tow a 1400 kg car from rest to 52 km/h? (Assume a rolling resistance of 215 N).

*February 8, 2015 by nesh*

**Algebraic**

Salem and Vernon ville are 168 miles apart. A car leaves Salem traveling towards Vernonville, and another car leaves Vernonville at the same time, traveling towards Salem. The car leaving Salem averages 10 miles per hour more than the other and they meet after 1 hour and 36 ...

*April 1, 2013 by Evelyn*

**Math**

A car leaves town traveling 35 MPH. Two hours later a 2nd car leaves, in the same direction traveling 55 MPH.In how many hours will the 2nd car be passing the first?

*September 7, 2016 by Jacob*

**Physics**

Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 22.0 m/s. At the same time, car 2 is 1.4 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding up with an acceleration of magnitude 3.0 m/s2 ...

*October 3, 2012 by Anonymous*

**math**

the distance of D in feet it takes a car traveling at x mph to come to a full stop after hitting the brakes is given by d= 1.26x^2+ .075x. Est. the stopping distance for a car traveling at 40 mph

*December 17, 2010 by cynthia*

**Physics**

Need Help with physics! Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 17.0 m/s. At the same time, car 2 is 1.3 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding up with an ...

*October 4, 2012 by Brandon*

**Khudu secondary **

Car A of mass 1 000 kg,stationary at a traffic light,is hit from behind by car B of mass 1 200 kg,traveling at 18 m.s-1. Immediately after the collision car A moves forward at 12 m.s-1. 1. Assume that linear momentum is conserved during this collision. Calculate the speed of ...

*March 10, 2013 by Antony*

**PHYSICS**

A car traveling at a constant velocity of 30.0 m/sec passes an intersection at time t=0. 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car overtake the first car? how ...

*October 16, 2011 by Daniel*

**PHYSICS**

a car traveling at a constant velocity of 30 m/sec passes an intersection at time t=0 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car overtake the first car? how far...

*October 17, 2011 by PHY*

**Physics**

How fast would a 9-g fly have to be traveling to slow a 1910-kg car traveling at 61 mph by 6 mph if the fly hit the car in a totally inelastic head-on collision? Could someone explain the steps, please?

*June 6, 2012 by Jeremy *

**college physics**

A truck of mass 9M is moving at a speed v = 15 km/h when it collides head on with a parked car of mass M. Spring mounted bumpers ensure that the collision is essentially elastic. Find the final velocities of each vehicle. Repeat for the case of the car moving at speed v= 15 km...

*May 14, 2010 by Adam*

**physics**

Damon, thanks for your answer. Consider that the 20lb object is being pulled behind a bid rig truck traveling at 90mph, can it then be calculated as to what amount of horsepower, is being provided to move (in our case) a 20lb object, traveling at 90mph. If yes,what amount of ...

*August 2, 2011 by david*

**math**

The stopping distance D of a car after the brakes have been applied varies directly as the square of the speed s. A certain car traveling at 70 mi/h can stop in 343 ft. What is the maximum speed it can be traveling if it needs to stop in 160 ft?

*February 26, 2013 by El*

**physics**

A car sits in an entrance ramp to a freeway, waiting for a break in the traffic. The driver sees a small gap between a van and an 18-wheel truck and accelerates with constant acceleration along the ramp and onto the freeway. The car starts from rest, moves in a straight line, ...

*September 29, 2013 by Emma*

**physics**

A 250 kg car starting from rest is pushed 30m. When the car reaches 30m, it’s traveling at a speed of 12m/s and it encounters 52N of friction. What is the acceleration of the car and what is the force of the push on the car?

*December 1, 2010 by Alyssa*

**Physics**

A speeding motorcyclist is traveling at a constant speed of 31.1 m/s when he passes a police car parked on the side of the road. The radar, positioned in the police car's rear window, measures the speed of the motorcycle. At the instant the motorcycle passes the police car, ...

*September 5, 2014 by Hamad*

**Math**

A car leaves town traveling at 35 MPH. A 2nd Car leaves Town 2 hours later traveling in the same direction. In how many hours will the 2nd car be passing the first.

*September 7, 2016 by Jacob*

**Physics**

A tow truck is pulling a car out of a ditch by means of a steel cable that is 9.3 m long and has a radius of 0.50 cm. When the car just begins to move, the tension in the cable is 1070 N. How much has the cable stretched? Answer in m

*November 30, 2012 by Elizabeth*

**physics **

A car is traveling at 95km/hr. the driver steps on the brakes and the car comes to a stop in 60m. What is the car's deceleration?

*September 5, 2013 by Grace*

**Physics**

At t = 0, an automobile traveling north begins to take a turn. It follows one-quarter of the arc of the circle of radius 9.8 m until, at t = 1.38 sec, it is traveling east. The car does not alter its speed during the turn.

*September 23, 2013 by Jenn*

**Physics**

1. Car A, with mass of 1250 kg, is travelling at 30 m/s to the east. Car B is a truck with mass of 2000 kg, travelling to the west at 25 m/s. Assume these two vehicles experience an inelastic collision but do not stick together, and Car A goes off 10 m/s to the west. What will...

*April 8, 2014 by Jaime*

**math**

Mary and John are 128 miles apart. A car leaves Mary traveling towards John and another car leaves John at the same time traveling towards Mary. The car leaving Mary averages 10 miles per hour more than the other car and they meet after 1 hour and 36 minutes. What are the ...

*March 20, 2015 by Pater*

**Physics**

A tow truck exerts a force of 3000 N on a car, accelerating it at 2 m/s2 . What is the mass of the car?

*February 1, 2011 by Peter*

**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*

**Physics**

The speed time graph shows the motion of a car over a period of 40 seconds. a. describe the motion of the car between: 1.) O and A - The car is traveling at constant speed from 0 to 20 m/s. 2.) A and B - The car is at rest for 20 seconds. 3.) B and C - The car is decelerating ...

*February 5, 2013 by RR*

**Physics**

The speed time graph shows the motion of a car over a period of 40 seconds. a. describe the motion of the car between: 1.) O and A - The car is traveling at constant speed from 0 to 20 m/s. 2.) A and B - The car is at rest for 20 seconds. 3.) B and C - The car is decelerating ...

*February 5, 2013 by RR*

**Science**

A car is traveling at 65 km/hr. The brakes are applied and the car stops in 3 seconds. What is the car's acceleration?

*December 1, 2015 by Lana*

**physics**

A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 259 m, and the car completes the turn in 38.0 s. a)Determine the car's speed.m/s b)What is the magnitude and direction of the ...

*October 18, 2012 by Karrine*

**PHYSICS**

A tow truck is pulling a car out of a ditch by means of a steel cable (Y = 2.0 x 1011 N/m2) that is 9.73 m long and has a radius of 0.550 cm. When the car just begins to move, the tension in the cable is 859 N. How much has the cable stretched?

*November 4, 2015 by Anonymous*

**Analytical Mechanics**

A car traveling at 100Km/hr smashes into a concrete abutment. Show that the collision is the equivalent to driving off the top of a ten story building. Allow 4 meter per story and neglect air resistance. Next, find the equivalent vertical height to represent the effect of a ...

*February 8, 2011 by Garrett*

**Phsycis 203**

You're standing by the roadside as a truck approaches, and you measure the dominant frequency in the truck noise at 1105Hz . As the truck passes, the frequency drops to 885Hz. What is the truck's speed?

*May 11, 2010 by Mike*

**Physics**

A truck is stopped for a red light at Ridge Road on Higgins line. At the instant the light turns green, the truck pulls away with a constant acceleration of 3.3 m/s2. A cyclist approaching the truck with a constant velocity of 12.0 m/s is 8.60 m behind the truck when the light...

*October 5, 2011 by Nick*

**phy111**

A truck is moving at a speed of 70km/h. The exhaust pipe above the truck cab sends out a trail of smoke that makes an angle of 20o east of south behind the truck. If the wind is blowing directly toward the east, what is the wind speed at that location?

*August 12, 2014 by samson*

**physics**

A tow truck is connected to a 1500 kg car by a cable that makes a 27 degree angle to the horizontal. If the truck accelerates at 0.58 m/s^2, what is the magnitude of the cable tension? Neglect friction and the mass of the cable.

*April 1, 2012 by ian*

**physics**

On the once popular show “Knight Rider,” the tricked-out car (for the 80s, anyway), Kit, 1. drives up a ramp and into the back of a semi truck while the truck is moving. A viewer once expressed disbelief that this is possible. Assuming that Michael Knight (the driver) can ...

*October 27, 2015 by reddy*

**physics**

A 1200 kg car is traveling at 45 km/h and hits a 1000 kg car parked on the edge of a 70 m deep canyon. What is the velocity of the two car wreck?

*January 12, 2011 by matt*

**physics**

Car traveling on circular track. Point A is at positive x,y. Point B is at positive x, negative y. A car is traveling around a horizontal circular track with radius r = 220 m as shown. It takes the car t = 51 s to go around the track once. The angle čA = 31° above the x axis, ...

*October 7, 2013 by Anonymous*

**physics**

A crate of mass 97 kg is loaded onto the back of a flatbed truck. The coefficient of static friction between the box and the truck bed is 0.26. What is the smallest radius of curvature (in m) that the truck can take, if the speed with which it is going around a circle is 44 m/...

*October 4, 2010 by Becky*

**physics**

the 900 kg car was traveling south and collided with the 2000kg car traveling west. they both got tangled and moved away from the impact point as one mass at 16.0m/s in the direction 24degrees west of south. what was the initial speed of each prior to the collision?

*August 11, 2014 by kristen*

**Physics**

Read each statement below. For each situation, calculate vi, vf, pi, pf, the impulse vector Ft, and the amount of force needed for the change to occur. All situations refer to a truck with a mass of 2840 kg. 1. The truck has a velocity of 8.30 m/s and comes to a stop...

*February 7, 2011 by SARAH*

**Physics**

A car and a truck travel with same velocity, the car has more kinetic energy. True or false

*August 18, 2010 by Anonymous*

**physics**

A speeder traveling at a constant speed of 117 km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (7.6 km/h)/s until it reaches its maximum speed of 175 km/h, which it maintains until it catches up with the speeder.(a) How long does it ...

*June 10, 2016 by Ace*

**physics**

3. In the figure, a runaway truck with failed brakes is moving downgrade at 107 km/h just before the driver steers the truck up a frictionless emergency escape ramp with an inclination of θ = 14°. The truck's mass is 1.4 × 104 kg. (a) What minimum length L must the ramp ...

*April 7, 2013 by Samira *

**Physics**

A 500 kg car experiences a frictional force of 3208 N while turning, if the car is traveling around a turn of radius 16 m what is the velocity of the car?

*January 15, 2015 by Brooke*

**Physics**

A 500 kg car experiences a frictional force of 3080 N while turning, if the car is traveling around a turn of radius 17 m what is the velocity of the car?

*January 20, 2015 by Brooke*

**algebra**

Can someone please tell me if I did this problem right? A new truck that sells for $29,000 depreciates 12% each year. Write a function that models the value of the truck. Find the value of the truck after 7 years. my answer=p(x)=price of truck ($) p(x)=29000(.88)^x value of ...

*March 29, 2007 by Fidelia*

**physics**

Car a with a mass of 1250kg is travelling at 30m/s to the east. Car b is a truck with a mass of 2000kg, travelling to the west at 25m/s. Assume these two vehicles experienc an inelastic collision but do not stick together and car a goes off 10m/s to the west what will be the ...

*October 3, 2013 by David*

**Dynamics**

During a high-speed chase, a 2400-lb sports car traveling at a speed of 100 mi/h just loses contact with the road as it reaches the crest A of a hill. a) Determine the radius of curvature r of the vertical profile of the road at A. b) Using the value of r found in a part a), ...

*March 24, 2011 by Sarah*

**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 speeder traveling at a constant speed of 125km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (8.0km/h)/s until it reaches its maximum speed of 190km/h, which it maintains until it catches up with the speeder. (a) How long does it take...

*August 27, 2013 by alex *

**algebra**

If Jenny's car uses less gas per mile driven than Sandra's truck, how does the graph representing the rate of change of Sandra's truck compare to the graph representing the rate of change of Jenny's car?

*June 16, 2013 by q*

**Physics**

A truck tractor pulls two trailers, one behind the other, at a constant speed of 100 km/h. It takes 0.640 s for the big rig to completely pass onto a bridge 390 m long. For what duration of time is all or part of the truck-trailer combination on the bridge?

*September 3, 2012 by Joli*

** 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*

**Physics**

The mass of a sports car is 1200 kg. The shape of the car is such that the aerodynamic drag coefficient is 0.250 and the frontal area is 2.30 m2. Neglecting all other sources of friction, calculate the initial acceleration of the car ,if it has been traveling at 80 km/h and is...

*February 24, 2011 by Jamie*

**Physics**

The mass of a sports car is 1200 kg. The shape of the car is such that the aerodynamic drag coefficient is 0.250 and the frontal area is 2.30 m2. Neglecting all other sources of friction, calculate the initial acceleration of the car ,if it has been traveling at 85 km/h and is...

*October 9, 2014 by Alex*

**math**

if car one is traveling at 45miles per hr in one direction. How fast is car no 2 has to go from stoped state to catch up with car one after 15 miles assuming car 2 can go from 0-60 in 5 sec.

*November 12, 2012 by gus*

**Mathematics**

A car X left town A for town B at the same time that another car Y left town B for town A, each travelling at constant speed. They met 80 minutes later and car X arrived at town B 36 minutes after car Y reached town A. How long did it take car X to reach town B?

*July 9, 2015 by Henry*

**physics(Quick!)**

if a car accelerates from rest at a constant 5.5 m/s^2, how long will it take for the car to reach a velocity of 28 m/s

*October 13, 2011 by ...*

**Science**

A car weighing 24,500 Newtons is traveling east and travels a distance of 100 meters in 20 seconds. What is the car's mass? What is the car's kinetic energy?

*April 12, 2013 by Lele Reynolds*

**Physics - drwls?**

A 2000 kg truck traveling north at 38 km/hr turns east and accelerates to 55 km/hr. What is the change in the truck's kinetic energy? What is the magnitude of the change in the linear momentum of the truck? What is the direction of the change in linear momentum of the truck? (...

*March 19, 2007 by winterWX*

**physics**

A car traveling 50 m/s has tires tires that with radii of 0.25 m. The driver of the car hits the brakes and brings the car to a stop in 5 seconds. What is the angular acceleration of the tires on the car?

*April 25, 2011 by bejay*

**physics**

Two cars are traveling at the same constant speed v. Car A is moving along a straight section of the road, while B is rounding a circular turn. Which statement is true about the acceleration of the cars? a.) acceleration of both cars is zero b.) car A is accelerating but car B...

*October 19, 2010 by jo*

**Algebra**

Evan washes two types of vehicles. It takes him 30 minutes to wash a car and 40 minutes to wash a truck. He charges $12 to wash a car and $15 to wash a truck. In 270 minutes, Evan made $105 washing cars and trucks. How many trucks did Evan wash?

*July 4, 2014 by alex*

**algebra 2-1**

Evan washes two types of vehicles. It takes him 30 minutes to wash a car and 40 minutes to wash a truck. He charges $12 to wash a car and $15 to wash a truck. In 270 minutes, Evan made $105 washing cars and trucks. How many trucks did Evan wash?

*July 6, 2016 by noni*

**Adv. Math**

I dont understand these problems =/ How many inches are in 3/8 of a foot? How long would it take a car traveling 60 mph to go 250 miles?

*February 28, 2008 by Kenya Ruiz*

**Physics**

You are testing a car on the Nevada salt flats traveling 85 m/s. Your parachute deploys and you decelerate at 13 m/s^2. How long does it take to come to a complete stop?

*September 22, 2016 by Kay *

**Physics**

An unmarked police car traveling a constant 90 km/h is passed by a speeder traveling 128 km/h. Precisely 1.00 s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.80 m/s2 , how much time passes after the police car is ...

*September 6, 2015 by Anonymous*

**physics**

A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 45.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 3.00 m/s^2. Including the reaction time, how long ...

*September 6, 2012 by colby*

**physics**

A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 5.00 m/s^2. Including the reaction time, how long ...

*June 18, 2013 by louis aaaa*

**Physics**

A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 40.0 m/s due north. After a reaction time 0.500 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the reaction time, how long ...

*September 10, 2013 by Kaitlyne*

**physics**

A police car is traveling at a velocity of 19.0 m/s due north, when a car zooms by at a constant velocity of 49.0 m/s due north. After a reaction time 0.600 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the reaction time, how long ...

*September 15, 2013 by Katy*

**Physics**

A police car is traveling at a velocity of 19.0 m/s due north, when a car zooms by at a constant velocity of 49.0 m/s due north. After a reaction time 0.600 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the reaction time, how long ...

*September 16, 2013 by Tonya*

**Physics**

A police car is traveling at a velocity of 20.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the reaction time, how long ...

*September 27, 2014 by Peanutbutter7*

**Physics**

A 1000kg car is traveling along a level road at 20.00ms, when the brakes are applied long enough to do 50000 J of work. 1) what is the initial kinetic energy of the car? 2) if the car moved 100m while the brakes where applied, what was the average force exerted on the brakes.

*April 13, 2010 by Kirsten*

**Physics**

The mass of a sports car is 1100 kg. The shape of the car is such that the aerodynamic drag coefficient is 0.240 and the frontal area is 2.40 m2. Neglecting all other sources of friction, calculate the initial acceleration of the car ,if it has been traveling at 105 km/h and ...

*July 10, 2010 by Simi*

**college physics**

Imagine that your car can travel 25 mi on 1 gal of gas when traveling on a level road at 55mi/h. Estimate your gas mileage while traveling at 55 mi/h up an incline that gains 3m in elevation for every 100 m one goes forward along the incline. Assume that your car has a mass of...

*October 11, 2010 by Tommy*

**physics **

A small truck runs off the road and over a 100metre high cliff. It lands 50 metre from the base of the cliff. How long did it take for the truck to hit the ground

*June 20, 2015 by andrew *

**math**

Two professional drag racers are speeding down a 1/4-mile track. If the lead driver is traveling 1.738 feet for every 1.670 feet that the trailing car travels, and if the trailing car is going 198 miles per hour, how fast in miles per hour is the lead car traveling?

*October 13, 2009 by Bob*

**Physics**

Some bags (the mass of each bag is 50 kg) are put in the truck of 200 kg mass. After applying 400 N force the car started moving with 1 m/s accelaration.Now my question is'', how many Bags are in the truck?

*December 6, 2015 by Akhter*

**physics**

A train is moving parallel and adjacent to a highway with a constant speed of 22 m/s. Initially a car is 69 m behind the train, traveling in the same direction as the train at 35 m/s and accelerating at 3 m/s 2 . What is the speed of the car just as it passes the train

*January 19, 2011 by Katy*

**Physics**

A train is moving parallel and adjacent to a highway with a constant speed of 28 m/s. Initially a car is 29 m behind the train, traveling in the same direction as the train at 42 m/s and accelerating at 3 m/s^2. What is the speed of the car just as it passes the train?

*August 8, 2014 by chris*

**physics**

A train is moving parallel and adjacent to a highway with a constant speed of 24 m/s. Initially a car is 48 m behind the train, traveling in the same direction as the train at 35 m/s and accelerating at 3 m/s 2 . What is the speed of the car just as it passes the train?

*September 14, 2014 by Anonymous*

**physics**

A train is moving parallel and adjacent to a highway with a constant speed of 24 m/s. Initially a car is 48 m behind the train, traveling in the same direction as the train at 35 m/s and accelerating at 3 m/s ^2 . What is the speed of the car just as it passes the train?

*September 14, 2014 by Mar*

**Physics**

A car with a total mass of 1800kg (including passengers) is driving down a washboard road with bumps spaced 5.0m apart. The ride is roughest—that is, the car bounces up and down with the maximum amplitude—when the car is traveling at 6.1 m/s.What is the spring constant of the ...

*April 12, 2015 by Anonymous*

**physical science**

A small car with a weight of 2000 lb traveling at 30 mph can stop in about 100 ft. How far does it take for a large SUV weighing 8000 lb to stop if it is also traveling at 30 mph?

*December 15, 2011 by Fonda*

**Physics **

A car is moving at 10 m/s when it begins to be accelerated at 2.5m/s2. how long does the car take to reach a speed of 25 m/s? How far does it go during this period?

*September 9, 2011 by Kris*

**physics**

A train is moving parallel and adjacent to a highway with a constant speed of 30 m/s. Ini- tially a car is 44 m behind the train, traveling in the same direction as the train at 42 m/s and accelerating at 3 m/s2. What is the speed of the car just as it passes the train?

*January 19, 2011 by Anonymous*

**Physics**

The driver of a 1350 kg car, initially traveling at 10.6 m/s, applies the brakes, bringing the car to rest in a distance of 15.0 m. Find the net work done on the car. Not sure how to set this problem up.

*October 5, 2011 by Help*

**physics**

you are traveling in your car at a velocity of 24.0 m/s east when you slam on your brakes. The force of friction on your car tires is 1.80x10^4 N. If the mass of you and your car is 1.50x10^3 kg, how far do you skid before stopping?

*October 22, 2011 by Anonymous*

**Calculus help!**

(1) A toy truck travels at a rate of 0.5t ft/sec after t seconds of travel (so after 6 seconds the truck is traveling 3 ft/sec). a) Graph the speed of the truck vs. time for 0<t<10. b) Find the distance the truck has traveled in the first t seconds for 0<t<10. Call...

*January 21, 2008 by anonymous*

**physics**

In Fig, a runaway truck with failed brakes is moving downgrade at 160 km/h just before the driver steers the truck up a frictionless emergency escape ramp with an inclination of č = 11°. The truck's mass is 1.5 x 104 kg. (a) What minimum length L must the ramp have if the ...

*March 21, 2009 by sweety*

**Physics **

A train is moving parallel and adjacent to a highway with a constant speed of 27 m/s. Initially a car is 41 m behind the train, traveling in the same direction as the train at 39 m/s and accelerating at 4 m/s 2 . What is the speed of the car just as it passes the train? Answer...

*November 4, 2012 by Savannah*

**Calculus**

"Two cars are traveling along perpendicular roads, car A at 40mph, car B at 60mph. At noon, when car A reaches the intersection, car B is 90miles away, and moving toward it. At 1PM the distance between the cars is changing at what rate?" So lost! Please help!

*January 24, 2012 by Chris*

**caluclus homework help**

(1) A toy truck travels at a rate of 0.5t ft/sec after t seconds of travel (so after 6 seconds the truck is traveling 3 ft/sec). a) Graph the speed of the truck vs. time for 0<t<10. b) Find the distance the truck has traveled in the first t seconds for 0<t<10. Call...

*January 20, 2008 by Leslie*

**physics**

The driver of a truck slams on the brakes when he sees a tree blocking the road. The truck slows down uniformly with an acceleration of -5.60 m/s2 for 4.20 s, making skid marks 62.4 m long that end at the tree. With what speed does the truck then strike the tree?

*September 13, 2012 by starr*

**physics**

a car traveling in a large circle passes by a motorcycle that is traveling in a straight line from North to South. both of their speedometers read 10m/s. which statement below is true? A. The car and the motorcycle have the same speed, but different velocities. B. The car and ...

*January 8, 2011 by Anonymous*

**Physics Homework**

1. You push a heavy car by hand. The car, in turn, pushes back with an opposite but equal force on you. Doesn’t this mean the forces cancel one another, making acceleration impossible? Why or why not? -No, because of the system that is involved. The system would be you and the...

*September 12, 2007 by Soly*