Thursday

October 8, 2015
Number of results: 34,657

**physics**

a car moving at 30 m/s slows to a speed of 10 m/s in a time of 5 s. determine a.) the acceleration of the car (b). the distance it moves in the third second.
*March 10, 2015 by sha*

**physics**

Question Part Points Submissions Used 1 2 3 4 5 0/5 –/5 5/5 0/5 0/5 1/10 0/10 1/10 2/10 2/10 Total 5/25 A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car ...
*October 22, 2011 by carlton*

**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...
*September 5, 2013 by katie*

**Physics**

A 0.90 × 10^3 kg sports car collides into the rear end of a 2.4 × 10^3 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 4.6 m before stopping. The police officer, estimating the coefficient of kinetic friction between tires ...
*October 20, 2011 by kago*

**Physics**

A car is traveling along a straight road at a velocity of +36.0 m/s when its engine cuts out. For the next ten seconds, the car slows down, and its average acceleration is 1. For the next five seconds, the car slows down further, and its average acceleration is 2. The velocity...
*May 7, 2007 by Papito*

**Physics**

A helicopter is flying in a straight line over a level field at a constant speed of 21.7 m/s and at a constant altitude of 11.5 m. A package is ejected horizontally from the helicopter with an initial speed of 21.6 m/s relative to the helicopter, and a direction opposite to ...
*November 4, 2007 by Lindsay*

**physics**

A car has an initial velocity of 20 m/s to the right, 17 seconds later it is seen to be moving at 46 m/s to the left. WHAT DISTANCE DID IT TRAVEL? Does the 17 seconds include the initial 20m/s? If not, how do I find the other distance. If so... What do I do. Sorry I am in a ...
*August 30, 2014 by Debby*

**college physics**

Let the radius of the circular segment be 108 m, the mass of the car 1861 kg, and the coefficient of the static friction between the road and the tire 0.9. The banking angle is not given. Find the magnitude of the normal force N which the road exerts on the car at the opti-mal...
*October 5, 2010 by mark*

**Physics**

A car moving at some speed hits the brakes and skids to a stop after 11 m on a level road. If the coefficient of friction for the road conditions of wet asphalt is 0.53, what was the car's original speed before braking? I have used multiple modes to find the answer and have ...
*October 22, 2014 by Kirstie *

**physics**

speed of the car is 47.52 km/hr. a lorry wheel is rotating at 400 RPM. what is the radius (in cm) of a lorry wheel if the lorry has a same speed with the car?
*November 27, 2011 by HELP ME!!!!*

**Physics**

1)As a sound source moves away from a stationary observer, the number of waves will. A)increase B)decrease C)remain the same D)need to know the speed of the source (answer:decrease.) As the detector recedes from the source, the relative velocity is smaller, resulting in a ...
*April 7, 2008 by Jon*

**math physics i think**

We have 2 cars. Car "A" and car "B" if car A weighs 3180 lbs If car "B" weighes 2000 pounds How fast would car "A" have to travel to knock car "B" 32 feet?
*September 24, 2011 by Jay Schmetz*

**Physics**

What is the kinetic energy of an ideal projectile of mass 19.4 kg at the apex (highest point) of its trajectory, if it was launched with an initial speed of 29.2 m/s and at an initial angle of 46.9° with respect to the horizontal?
*October 21, 2014 by Anonymous*

**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...
*January 25, 2010 by Brendan *

**physic**

If the work required to speed up a car from 13 km/h to 20 km/h is 6.5×103 J, what would be the work required to increase the car’s speed from 20 km/h to 35 km/h?
*February 23, 2011 by paul*

**physics**

A 2.9 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 16.0 with the horizontal. An average frictional force of 4.2×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.6 m/s. The acceleration of ...
*November 29, 2011 by Matt*

**physics**

I'm driving along at a constant speed in my 3 metre long car when I notice that I am accidentally driving through a red light. If the rear of my car passes under the light 0.3 seconds after the front of my car, how fast am I driving in m/s?
*February 3, 2014 by suresh*

**physics**

I'm driving along at a constant speed in my 3 meter long car when I notice that I am accidentally driving through a red light. If the rear of my car passes under the light 0.3 seconds after the front of my car, how fast am I driving in m/s?
*February 26, 2014 by hamza*

**physics**

I'm driving along at a constant speed in my 3 meter long car when I notice that I am accidentally driving through a red light. If the rear of my car passes under the light 0.3 seconds after the front of my car, how fast am I driving in m/s?
*February 28, 2014 by yogesh*

**Physics**

A 1100 kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m. (a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (...
*September 16, 2010 by Phil*

**Physics**

Steel Phantom is a roller coaster in Pennsylvania that, like the Desperado in Nevada, has a vertical drop of 68.6m Suppose a roller-coaster car with a mass of 1000 kg travels from the top of that drop without friction. The car then decelerates along a horizontal stretch of ...
*December 3, 2012 by Anonymous*

**calculus**

A police car is driving northward, chasing a vehicle which has just taken a right turn at an intersection, and is travelling due west. When the police car is 600 yards south of the intersection, and the car is 800 yards east of the intersection, an aerial speed radar indicates...
*April 12, 2011 by ellie*

**physics **

You jog at 9.5 km/h for 7.0km , then you jump into a car and drive an additional 16km . With what average speed must you drive your car if your average speed for the entire 23km is to be 22 km/h? Work: i tried setting up a proportion and setting it to each other using the ...
*August 12, 2014 by Zara*

**Physics**

A car travels due east with a speed of 40.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 54.0° with the vertical. Find the velocity of the rain with respect to the ...
*September 29, 2015 by Aly*

**Physics **

Question: A car is on a ramp 100m from the bottom of the ramp (angle of incline=30 degrees): a. If the potential energy of the car is 80902 J, how much does the car weigh? b. What is the KE half way down the ramp? c. What speed is the car moving at the bottom of the ramp? ...
*June 27, 2011 by Tina*

**physics**

A 1790-kg car is traveling with a speed of 15.6 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 78.4 m?
*January 27, 2011 by brian*

**physics**

A 1790-kg car is traveling with a speed of 15.6 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 78.4 m?
*January 28, 2011 by Anonymous*

**physics**

6. A 1580 kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 50.0 m?
*August 9, 2011 by rawaf*

**physics**

A 1340 kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 51.5 m?
*September 14, 2011 by phillip*

**Physics**

a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.?
*September 20, 2011 by Rafael*

**Physicss**

a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.? Thank you
*September 20, 2011 by Rafael*

**physics**

a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.? Thank you
*September 21, 2011 by Raf*

**Physics**

What is the impact speed when a car moving at 95km/h bumps into the rear of another car traveling in the same direction at 93km/h?
*October 12, 2011 by Sarah*

**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?
*January 26, 2012 by Paige*

**physics**

A 1370 kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 49.5 m?
*February 28, 2012 by u/a*

**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)?
*May 10, 2012 by Bob*

**Physics**

A 1560 kg car is traveling with a speed of 14.5 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 53.3 m?
*September 21, 2012 by Kellie*

**Physics 1**

A 1720-kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 47.0 m?
*October 3, 2012 by Anonymous*

**Physics**

A 1720-kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 47.0 m?
*October 3, 2012 by Donald*

**physics**

A 1720-kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 47.0 m?
*October 8, 2012 by Donald*

**physics**

A 1720-kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 47.0 m?
*October 9, 2012 by Donald*

**physics**

A railroad car with a mass of 2000kg is rolling at a speed of 15m/s. What force would be required to stop the car in 10 seconds?
*March 21, 2013 by Tcrowder*

**physics**

A 1523.7 kg car traveling with a speed of 20.8 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 53.5 m?
*September 20, 2013 by paul*

**physics**

With brakes fully applied, a 1370 kg car deccelerates from a speed of 98.0 km/hr. What is the work done by the braking force in bringing the car to a stop?
*July 11, 2014 by charles*

**physics**

car moving on a straight road covers a distance of 1.5 km due east in 150 second.what is the speed of the car?what is it's velocity?
*June 1, 2015 by rahul*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.83 m/s2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 80 km/h to one of 92 km/h?
*September 25, 2015 by Anonymous*

**physics**

A certain car is capable of accelerating at a uniform rate of 0.83 m/s2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 80 km/h to one of 92 km/h?
*September 25, 2015 by Anonymous*

**physics**

A car that is initially at rest at the top of a roller-coaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10-m-high circular hill at the bottom?
*December 7, 2010 by Shelby*

**Physics**

A tractor of mass 5.0*10^3kg is used to tow a car of mass 2.5*10^3kg.the tractor moved with a speed of 3.0m/s^1 just before the towing rope became taut.calculate:the speed of the tractor immediately the rope became taut, loose kinetic energy of the system just after the car ...
*January 30, 2012 by Thank-God*

**Math**

Please help me! I don't even know where to start :( my teacher took this question up on friday but i was sick, and we have a test tomorrow! -Car A travels from Barrie to Subuiry at an average speed of 90km/h -Car B travels from Subury to Barrie at an average speed of 80km/h -...
*March 7, 2010 by Dawn*

**physics**

A 3.1 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 19.5◦ with the horizontal. An average frictional force of 4.4×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.9 m/s. The acceleration...
*October 17, 2013 by Anonymous*

**Physics**

A 4.0 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 19.6◦ with the horizontal. An average frictional force of 4.0×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.9 m/s. The acceleration...
*December 6, 2013 by Artemis*

**Physics**

The (nonconservative) force propelling a 1.50E3 kg car up a mountain road does 4.70E6 j of work on the car. The car starts from rest at sea level and has a speed of 27.0 m/s at an altitude of 2.00E2 m above sea level. Obtain the work done on the car by the combined forces of ...
*December 9, 2012 by Matoro*

**Physics**

A race car can be slowed with a constant acceleration of -11 m/s^2 a. If the car is going 55 m/s, how many meters will it travel before it stops? b. How many meters will it take to stop a car going twice as fast? According to one of the teachers this is what they stated A. ...
*December 28, 2009 by Priscilla*

**Physics**

Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following four answers which ...
*October 24, 2010 by Kyle*

**Physics**

Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following four answers which ...
*October 24, 2010 by Kyle*

**physics**

A 0.500 kg is thrown vertically upward from the ground with an initial speed of 12.0 m/s. Define the initial potential energy to be zero on the ground. What are the potential energy and kinetic energy of the ball at 2.50m above the initial position?
*November 8, 2012 by Jeff*

**Physics**

A charged particle is moving downward with an initial speed of 5 × 106m/s when it encounters a uniform magnetic field that points east to west. (a) If the initial force on the particle is to the north, is the particle positive or negative? (b) If B = .25 T and the particle has...
*March 21, 2013 by Lindsey*

**physics**

A driver of a car traveling at 14.2 m/s applies the brakes, causing a uniform deceleration of 2.0 m/s 2 . How long does it take the car to accelerate to a ﬁnal speed of 10.7 m/s? Answer in units of s. 002 (part 2 of 2) 10.0 points b) How far has the car moved during the...
*March 31, 2011 by Anonymous*

**physics**

A car's wheel of radius r=50cm goes through 5000rev in 1min. find the car's average angular velocity,and how far it travels along the ground in 1min. The linear speed v and angular speed w of the point of a rotating body are connected by the equation v=wr. where r is the ...
*March 10, 2015 by Sarah*

**physics**

A truck of mass 2000kg travelling due south collides at an intersection with a car of mass 1200kg travelling due east. The car and truck become entangled and move off to the south-east. The truck driver claims to have been travelling at exactly 60km/hr(the speed limit) just ...
*April 13, 2012 by Lycra*

**Algebra**

The value of almost everything you own, such as a car, computer, or appliance, depreciates over time. When the value decreases by a fied amount each year, the depreciation is called straight-line depreciation. Suppose your car has an initial value of $16,750 and depreciates $...
*March 12, 2012 by kim*

**science**

Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v0. Car 1 begins to move at t=0, speeding up with a constant acceleration ax. Car 2 continues to move with a ...
*March 11, 2015 by sandile*

**Physics**

A hollow sphere of radius 0.30 m, with rotational inertia I = 0.080 kg m2 about a line through its center of mass, rolls without slipping up a surface inclined at 19° to the horizontal. At a certain initial position, the sphere's total kinetic energy is 70 J. (a) How much of ...
*October 21, 2009 by Mario*

**physics**

A hollow sphere of radius 0.30 m, with rotational inertia I = 0.072 kg m2 about a line through its center of mass, rolls without slipping up a surface inclined at 25° to the horizontal. At a certain initial position, the sphere's total kinetic energy is 45 J. (a) How much of ...
*January 5, 2011 by Joey*

**Physics**

Consider a roller coster car moving along a track from point A to point B to point C. a)if the roller coaster car starts from rest at point A (30m above the bottom of a dip (point b). What would be the speed of the car at the top of the next hill (point C), which is 20 m above...
*October 17, 2007 by Andrea*

**physics**

suppose a treadmill has an average acceleration of 4.7 x 10^-3 m/s^2. a. how much does its speed change after 5.0 min? b. if the treadmill's initial speed is 1.7 m/s, what will its final speed be?
*September 3, 2010 by Ally*

**physics**

suppose a treadmill has an avg acceleration of 4.7m/s^2. a) how much does its speed change after 5 min? b) If the treadmill's initial speed is .017 km/s, what will it's final speed be?
*September 21, 2014 by nicole*

**Physics**

Attempting to stop on a slippery road, a car moving at 90 km/h skids across the road at a 30 angle to its initial motion, coming to a stop in 3.8s. Determine the average acceleration in m/s^2, using a coordinate system with the x-axis in the direction of the car's original ...
*March 27, 2013 by James Baker*

**physics**

A sports car of mass 950kg (including the driver) crosses the rounded top of a hill (radius = 95m) at 22m/s. Determine a) the normal force exerted by the road on the car, b) the normal force exerted by the car on the 72kg driver, and c) the car speed at which the normal force ...
*November 3, 2009 by Sasha*

**physics**

A satellite that is spinning clockwise has four low-mass solar panels sticking out as shown; the mass of the satellite is 750 kg. A tiny meteor of mass 2 kg traveling at high speed rips through one of the solar panels and continues in the same direction but at reduced speed. ...
*June 9, 2011 by Daiyo*

**Physics**

At the 18th green of the US Open, Tiger Woods needs to make a 20.5 ft (6.25 m) birdie putt to win the tournament. When he hits the ball, giving it an initial speed of 1.57 m/s, it stops 6.0 ft. (1.83 m) short of the hole. Assume the deceleration caused by the grass is constant...
*September 15, 2013 by Tonya*

**physics**

A car is designed to get its energy from a rotating flywheel with a radius of 1.50 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4000 rev/min. (a) Find the kinetic energy stored in the ...
*March 17, 2010 by mike*

**Math**

A car traveled at a constant speed for 4 hours and covered 144.6 miles. It used 12 gallons of gas to travel this distance. How far did the car go in 1 hour? How far did the car travel on 1 gallon of gas?
*June 22, 2015 by Aiden*

**Physics**

The speedometer of your car shows that you are traveling at a constant speed of 35 m/s. Is it possible that your car is accelerating? yes no If so, explain how this could happen. see the above post.
*March 20, 2007 by Mary*

**physics**

A car is traveling with a constant speed 80 miles per hour a road that makes half a circle. What is the average velocity of the car?
*May 24, 2010 by ray*

**physics**

A car enters the freeway with a speed of 6.5 m/s and accelerates uniformly for 3.5 km in 3.9 min. How fast is the car moving after this time? Answer in units of m/s.
*September 18, 2010 by Anonymous*

**physics**

A car moving at 10m/s when it begins to be accelerated at 2.5m/s^2. (a)How long does the car take to reach a speed of 25m/s? (b) How far does it go during this period
*January 27, 2011 by Ashley*

**physics**

A car is traveling a road that includes two sides of an equilateral triangle with a constant speed s. What is the magnitude of the average velocity v of the car?
*March 8, 2011 by sandhu*

**physics**

if a car drives over a hill with a radius of 57 meters. At what maximum speed can the car travel without flying off the road
*April 28, 2011 by Wendy*

**Physic**

A race car makes two and a half laps around a circular track in 4.5 min. What is the car's average angular speed?
*May 8, 2011 by Anonymous*

**physics **

a car enters the freeway with a speed of 5.6 m/s and accelerates uniformly for 2.7 km in 3.0 minutes.How fast is the car moving after this time? answer in units of m/s
*September 18, 2011 by jane *

**Physics**

a car leaves skid marks 84 m long on the highway. Assuming a deceleration of 7.50 m/s2, estimate the speed of the car just before braking.
*September 19, 2011 by Shay*

**Physics**

A car enters the freeway with a speed of 6.7 m/s and accelerates uniformly for 3.0 km in 3.8 min. How fast is the car moving after this time? Answer in units of m/s
*September 25, 2012 by Lily*

**physics**

A car enters the freeway with a speed of 6.9 m/s and accelerates uniformly for 3.3 km in 2.8 min. How fast is the car moving after this time? Answer in units of m/s
*January 17, 2013 by Anonymous*

**Physics**

If the odometer on the car reads 25.0 km at the beginning of a trip and 65.0 km a half hour later, what is the average speed of the car? (Remember significant digits.)
*June 13, 2013 by Isis*

**Physics**

A car enters the freeway with a speed of 5 . 6 m/s and accelerates uniformly for 3.6 km in 2.7 min. How fast is the car moving after this time? Answer in units of m / s
*October 9, 2013 by Sydney*

**math**

if a car Tyre has a 20 inch radius, how many revolutions per second would this car have to generate to arrive at 150 km/h speed.
*July 12, 2014 by wandile*

**PHY SCI**

A race car goes around a circular, level track with a diameter of 1.00 km at a constant speed of 90.0 km/h. What is the car's centripetal acceleration in m/s^2?
*August 24, 2014 by Jennifer PR*

**Physics**

a driver of a car traveling at 17.3 m/s applies the brakes causing a uniform deceleration of 2.8m/s^2. How long does it take the car to accelerate to a final speed of 13.5 m/s?
*September 20, 2015 by Tytiana*

**AP Physics**

A car enters the freeway with a speed of 6.9 m/s and accelerates uniformly for 2.7 km in 3,7 min. How fast is the car moving after this time? Answer in units of m/s.
*September 27, 2015 by Natasha*

**AP Physics**

A car enters the freeway with a speed of 6.9 m/s and accelerates uniformly for 2.7 km in 3,7 min. How fast is the car moving after this time? Answer in units of m/s.
*September 28, 2015 by Natasha*

**energy conservation**

A car that is initially at rest at the top of a roller-coaster track moves down the track without friction. What must be the maximm initial height from which the car descends so that it will not fly off the 10-m-high circular hill at the bottom?
*December 7, 2010 by Shelby*

**physics**

Figure 8-31 shows a ball with mass m = 1.0 kg attached to the end of a thin rod with length L = 0.56 m and negligible mass. The other end of the rod is pivoted so that the ball can move in a vertical circle. (a) What initial speed must be given the ball so that it reaches the ...
*February 18, 2008 by dawn*

**physics**

A car travels from city a to city b at a constant speed of 60 km/h.A bus leaves city a 1h after the car and catches it as it enters city b.the distance betwen ehe cities is 240 km.what is the speed of the bus{assumed to be constant] during its journey
*December 17, 2011 by faisal*

**DrBob222**

How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The speed of sound is 343 m/s. I don't know what equation to use. I think I'm suppose to use this: fs(v-vd/v-vs) I know I got it wrong I got 11.8 m/s
*April 5, 2008 by Jon*

**algebra 2**

A car enters an interstate highway 15 mi north of a city.The car travels due north at an average speed of 62.5 mi/h.Write an equation to model the car’s distance d from the city after traveling for h hours. Graph the equation
*October 12, 2012 by aia*

**Physics**

A 1500-kg blue car is travelling south, and a 2000-kg red sports car is travelling west. If the momentum of the system consisting of the two cars is 8000kg.m/s directed at 60 degrees west of south, what is the speed of each car?
*March 3, 2015 by Reynaldo*

**Physics**

A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction between tires and road is ...
*October 24, 2010 by Eden*

**Physics**

A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m/s before stopping. The police officer, knowing that the coefficient of kinetic friction between tires and road ...
*October 26, 2010 by Eden*