Tuesday

February 28, 2017
Number of results: 39,784

**physics**

A racing car reaches a speed of 40 m/s. At this instant, it begins a uniform negative acceleration, using a parachute and a braking system, and comes to rest 5.0 s later. (a) Determine the acceleration of the car. (b) How far does the car travel after acceleration starts?

*September 7, 2012 by Tamera*

**Physics**

A 4.2 × 10^3 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 18.4◦ with the horizontal. An average frictional force of 4.1×10^3 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.9 m/s. The ...

*December 12, 2012 by alice*

**Physics**

An electron is projected, with an initial speed of vi=1.10e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal to twice its initial ...

*February 28, 2013 by bethel*

**Physics**

An electron is projected, with an initial speed of v= 2.18e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal to twice its initial ...

*March 2, 2013 by Phy*

**physics**

An electron is projected, with an initial speed of vi=1.38e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal to twice its initial ...

*March 4, 2013 by x*

**Physics**

An electron is projected, with an initial speed of vi=2.06e+05 m/sec, directly towards a proton that is essentially at rest. If the electron is initially a great distance from the proton, at what distance from the proton is its speed instantaneously equal to twice its initial ...

*March 5, 2013 by P*

**mitx 8.01x Classical Mechanics**

A motorist traveling with constant speed of vc = 17.000 m/s passes a school-crossing corner, where the speed limit is 10 m/s. Just as the motorist passes, a police officer on a motorcycle stopped at the corner starts off in pursuit. The officer accelerates from rest at am = 3....

*September 10, 2013 by youlife*

**mechanical science**

11. In an accident a freeway sports car made skid marks 200 m long along the pavement. The police estimated the braking acceleration of the car to be – 0.8g under the road conditions prevailing. Determine the speed of the sports car when the brakes were applied.

*December 20, 2012 by anshuman kumar*

**Physics**

A car of mass 900.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 49.7 km/hr (13.8 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...

*January 2, 2014 by Sam*

**Physics**

A car of mass 900.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 49.7 km/hr (13.8 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...

*January 2, 2014 by Adam*

**Physics**

A car of mass 920.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 48.2 km/hr (13.4 m/s), the net power which the engine supplies is 5900.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...

*May 31, 2016 by Sunny*

**physics**

A soccer ball is kicked with an initial horizontal velocity of 16 m/s and an initial vertical velocity of 17 m/s. 1) What is the initial speed of the ball? 2) What is the initial angle θθ of the ball with respect to the ground? 3) What is the maximum height the ball ...

*September 11, 2016 by Hallie*

**physics**

Consult Interactive Solution 2.22 before beginning this problem. A car is traveling along a straight road at a velocity of +38.8 m/s when its engine cuts out. For the next 2.01 seconds, the car slows down, and its average acceleration is . For the next 6.36 seconds, the car ...

*December 16, 2015 by trish*

**Algebra Word Problems**

when going more than 38 miles per hour the gas mileage of a certain car fits the model y=43.81 - 3.95x where x is the speed of the car in miles per hor and y is the miles per gallon of gas. Based on model what speed will the car average 15 miles per gallon

*December 15, 2009 by mike*

**physics**

A car drove off a cliff. The cliff was 8 ft high and the car landed 45 ft away from the edge of the cliff. What was the speed when the car left the cliff?

*February 9, 2010 by Amy*

**physics**

A car is traveling along a straight road at a velocity of +32.7 m/s when its engine cuts out. For the next 1.04 seconds, the car slows down, and its average acceleration is . For the next 5.23 seconds, the car slows down further, and its average acceleration is . The velocity ...

*September 18, 2012 by gary*

**physics**

A car is traveling along a straight road at a velocity of +27.7 m/s when its engine cuts out. For the next 1.94 seconds, the car slows down, and its average acceleration is . For the next 4.92 seconds, the car slows down further, and its average acceleration is . The velocity ...

*September 9, 2014 by S*

**Phsics**

A car is traveling along a straight road at a velocity of +38.8 m/s when its engine cuts out. For the next 2.01 seconds, the car slows down, and its average acceleration is . For the next 6.36 seconds, the car slows down further, and its average acceleration is . The velocity ...

*December 16, 2015 by Courtney*

**determining speed**

car leaves a 20 ft. skid mark how fast was the car traviling

*January 12, 2011 by karl*

**physics**

The car has a mass of 1200kg Calculate the kinetic of the car when it travels at a speed of 12 m/s.

*February 16, 2012 by Dan*

**NSCI 110**

a car that was initially moving at 25 m/s is accerlerated at 4.0 m/s^2 for 5.0 s. the final speed of the car is?

*October 7, 2012 by ebony*

**Physics**

A 1200.0-kg car speeds up from 16.0 m/s to 20.0 m/s. How much work was done on the car to increase its speed?

*March 5, 2013 by Sara*

**Physics**

A car rounds a curve with a radius of 25 m at a speed 30 m/s. What is the centripetal acceleration of the car?

*September 22, 2013 by Alison*

**physics**

a car travels 4km in 3 minutes.find the speed of car in cms-1

*May 30, 2016 by karan deeo*

**physics**

At the instant a traffic light turns green, a car starts from rest with a given constant acceleration 0.5 m/s^2. just as the light turns green, a bus, traveling with a given cinstant speed 16.0 m/s, passes the car. The car speeds up and passes the bus some time later. How far ...

*January 24, 2012 by qwertzuiop*

**physics**

At the instant a traffic light turns green, a car starts from rest with a given constant acceleration 0.5 m/s^2. just as the light turns green, a bus, traveling with a given cinstant speed 16.0 m/s, passes the car. The car speeds up and passes the bus some time later. How far ...

*January 24, 2012 by qwertzuiop*

**college**

A car accelerates at a rate of 0.6 m/s2. How long does it take for this car to from a speed of 55 mi/h to 60 mi/h?

*September 19, 2010 by Maggie*

**college**

A car accelerates at a rate of 0.6 m/s2. How long does it take for this car to go from a speed of 55 mi/h to 60 mi/h?

*September 19, 2010 by Maggie*

**physics**

A 1,600 kg car is traveling at a speed of 12.5 m/s. What is the kinetic energy of the car?

*November 15, 2012 by austin*

**physics**

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. A)42.5 Hz B)54.5 Hz C)61.8 Hz D)65.4 Hz v=16 fs=583 vs=343 (16+0)/16 Im not even gonna post the rest because quite ...

*April 7, 2008 by Jon*

**physics**

A 640-kg racing car completes one lap in 14.3 s around a circular track with a radius of 45.0 m. The car moves at constant speed. (a) What is the acceleration of the car? m/s2 (b) What force must the track exert on the tires to produce this acceleration?

*January 6, 2012 by bob*

**circular motion**

When you take your 1300-kg car out for a spin, you go around a corner of radius 57.7 m with a speed of 16.5 m/s. The coefficient of static friction between the car and the road is 0.93. Assuming your car doesn't skid, what is the force exerted on it by static friction?

*April 12, 2012 by Anonymous*

**Physics**

A 640-kg racing car completes one lap in 14.3 s around a circular track with a radius of 55.0 m. The car moves at constant speed.(a) What is the acceleration of the car?(b) What force must the track exert on the tires to produce this acceleration?

*October 25, 2012 by Jamal*

**Math**

A 605-kg racing car completes one lap in 14.3 s around a circular track with a radius of 40.0 m. The car moves at constant speed. a) What is the acceleration of the car? (b) What force must the track exert on the tires to produce this acceleration?

*December 3, 2012 by Noah*

**physics**

A 605-kg racing car completes one lap in 14.3 s around a circular track with a radius of 40.0 m. The car moves at constant speed. (a) What is the acceleration of the car? (b) What force must the track exert on the tires to produce this acceleration?

*December 7, 2012 by Noah*

**Physics**

A 625-kg racing car completes one lap in 14.3 s around a circular track with a radius of 50.0 m. The car moves at a constant speed. (a) What is the acceleration of the car? (b) What force must the track exert on the tires to produce this acceleration?

*October 4, 2016 by Brendan*

**physics**

The security alarm on a parked car goes off and produces a frequency of 1370 Hz. The speed of sound is 343 m/s. As you drive toward this parked car, pass it, and drive away, you observe the frequency to change by 147 Hz. At what speed are you driving?

*January 28, 2013 by Anonymous*

**physics**

A car starts from rest and accelerates to a speed of 25 m/s in a time of 6 seconds. What os the acceleration of this car?

*October 1, 2010 by cameron*

**Physics**

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

*November 27, 2012 by Joan*

**Physics**

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

*November 28, 2012 by M*

**Physics**

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

*November 30, 2012 by Joe*

**math**

a car travels at an average speed of 100 km/hr. how many km will the car travel in 2 hours, 15 min?

*February 13, 2013 by Lori*

**science**

A car is traveling down the road at 25 m/s,and then increases their speed to 45 m/s in 5 seconds. What is this car's acceleration?

*September 13, 2013 by teddy*

**Physics**

A car experiences a constant acceleration of 2.3 m/s2. How long does it take (in s) for the car's speed to increase from 6.6 m/s to 17.9 m/s?

*January 29, 2014 by Chris*

**mathematics**

If a car travels at a constant speed of 112 km/h, How far will the car travel in 15 minutes.

*March 6, 2014 by melony henry*

**physics**

A car P is moving with uniform speed of 5m/s towards a carriage of mass 9kg at rest kept on the rails at point B. the height of AC is 120m.cannon balls of 1kg are fired from the car with an initial velocity of 100m/s at an angle 30 degree with the horizontal.the first cannon ...

*January 16, 2011 by sreeram*

**physics**

Proper design of automobile braking systems must account for heat buildup under heaving braking. Calculate the thermal energy dissipated from brakes in a 1460-kg car that descends a 15.5° hill. The car begins braking when its speed is 92 km/h and slows down to a speed of 28 ...

*February 14, 2011 by Johnathon*

**Physics**

Proper design of automobile braking systems must account for heat buildup under heaving braking. Calculate the thermal energy dissipated from brakes in a 1360-kg car that descends a 13.5° hill. The car begins braking when its speed is 88 km/h and slows down to a speed of 36 ...

*February 12, 2013 by Thomas*

**grade 7 math**

Uniform Motion Related Problem Chester drove his car at 8:00 a.m. at speed of 45 km/hr. At 9:15a.m. Michael followed with his car. What should be Michael's speed so as to be able to overtake Chester at 1:00 p.m.? How far has Chester travelled when Michael overtook him?

*January 19, 2015 by Krystal*

**Physics**

A motorcycle and a police car are moving toward one another. The police car emits sound with a frequency of 512 Hz and has a speed of 28.0 m/s. The motorcycle has a speed of 13.0 m/s. What frequency does the motorcyclist hear?

*November 22, 2011 by Cooper*

**Physics: mechanics**

A 250g bullet with a speed of 500m/s passes through the center of a 1.5kg square wooden block [ side length 18cm] at rest upon a horizontal frictionless surface. As it exits the block, the bullet has a speed of 150m/s. A) find the initial speed of the center of mass of the ...

*October 20, 2014 by Michelle*

**Physics**

a 9.50-g bullet. moving horizontally with an initial speed vi , embeds itself in a 1.45-kg pendulum bob that is initially at rest. The length of the pendulum is L=0.745m. After the collision, the pendulum swings to one side and comes to rest when it has gained a vertical ...

*August 5, 2011 by AfterLife*

**Physics Lab**

Collision derivation problem. A car is released from rest on a frictionless inclined plane. Assume h/L is approximately equal to y/x. equations. If the car has a mass of 0.2 kg, the ratio of height to width of the ramp is 11/110, the initial displacement is 2.25 m, and the ...

*July 20, 2013 by Tiff*

**physics hw**

A 300. kg roller coaster car is traveling at a constant speed of 15 m/s over a hill with a radius of curvature of 30. m. b. What is the normal force acting on the car at the top of the hill? c. Assume that the car is at the intersection of the radius and the hill and that a ...

*May 1, 2011 by robert*

**physics**

A 1,000 kg car accelerates uniformly to double its speed from 13.5 ms in 5.77 s. What net force acted on this car?

*April 3, 2011 by nofa*

**physical science**

A car travels at a constant speed of 60 km/h for 3.5 hours. What is the total distance that the car has traveled?

*September 13, 2011 by kannon*

**Physics**

A car has a velocity of 10m/s it now accelerate at 1m/s square, for 1/4.find the final speed of the car.

*October 2, 2011 by Anonymous*

**maths**

a car travels at a speed of 35mph how long would it take a car to travel 7miles

*October 3, 2011 by chloe*

**physics**

(a) What is the acceleration of a car in m/s² that doubles its speed from 36.0 km/h in 5.00 s? (b) What net force acted on this car if its mass was 1,000.0 kg?

*January 22, 2012 by sarah*

**trigonometry**

The wheels of a car have radius 11 in. and are rotating at 800 rpm. Find the speed of the car in mi/h. mi/h

*November 26, 2012 by monic*

**PHYSICS - PLEASE HELP**

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

*November 28, 2012 by Mary*

**physics**

A 1500.0 kg car accelerates uniformly to double its speed from 35.9 km/h in 4.74 s. What net force acted on this car?

*February 5, 2013 by Emily*

**Science**

A race car, moves at a constant speed around an oval track. Is the car accelerating? Why or why not?

*February 23, 2013 by Mia*

**physics**

A train is traveling up a 5.2° incline at a speed of 3.09 m/s when the last car breaks free and begins to coast without friction. (a) How long does it take for the last car to come to rest momentarily? (b) How far did the last car travel before momentarily coming to rest?

*September 20, 2009 by jawn*

**physics**

A train is traveling up a 3.6 incline at a speed of 3.30 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily? and how far did the last car travel before momentarily coming to rest?

*October 3, 2010 by Anonymous*

**physics**

A driver of a car traveling at 15.9 m/s applies the brakes, causing a uniform deceleration of 1.7 m/s2. How long does it take the car to accelerate to a final speed of 13.0 m/s? Answer in units of s. b) How far has the car moved during the braking period? Answer in units of m.

*March 20, 2011 by maria*

**physics**

The loaded car of a roller coaster has mass M = 320 kg. It goes over the hig a speed v of 21.4 m/s. The radius of curvature R of the hill is 62.3m (a) What is the force (N) that the track must exert on the car? (positive is (b) What must be the force (N) that the car exerts on...

*August 6, 2011 by waqas*

**Physics**

An 800-kg car traveling in a straight line at a speed of 30 m/s applies its brakes. During braking, there is a net force of 2000 N in the horizontal direction on the car. What distance will the car move from the time it applies its brakes until it has stopped?

*February 13, 2012 by Jub jub*

**phy 231**

A car of mass 860.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 39.6 km/hr (11.0 m/s), the net power which the engine supplies is 5700.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...

*February 14, 2016 by Andrea*

**Physics**

1. A ball is launched from a cliff with an initial velcity of 10 m/s at an angle of 40 degrees above horizontal. If the ball lands 24 m away, determine the height of the cliff. 2. if the mass A is 1 kg and the mass of B is 6.0 kg, determine the acceleration of the system and ...

*June 27, 2014 by Liz*

**physics**

A train is traveling along a straight, horizontal track at a constant speed of 20 mph (i.e.,a non-relativistic speed). An observer on the train places paint cans at the front and back of one of the cars. She then detonates the cans. Due to a malfunction, the can at the front ...

*April 6, 2014 by anonymous*

**Physics**

A car is travelling along a highway with a speed of 25 m/s when the driver sees an obstruction 1.80*10^2 m directly ahead. It takes the driver 0.80s to react and begin braking. a) How far does the car travel before it begins to slow down? b) How long will it take the car to ...

*March 4, 2013 by Mike*

**college math**

Braking distance The braking distance y in feetthat it takes for a car to stop on wet ,level pavement can be estimated by y = 1/9 x^2, where the x is the speed of the car in miles per hour Find the speed associated with with each braking distance. (a.) 25 feet (b.) 361 (c.) 784

*April 28, 2011 by Shin*

**Physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.77 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.04 s before Kathy. If Stan moves ...

*February 2, 2012 by Mathew*

**Physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.53 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.01 s before Kathy. If Stan moves ...

*September 20, 2013 by Connor*

**Math Models**

The distance needed to stop a car (d) varies directly with the aquare of the speed of the car (s). If a car traveling 25 mph requires 0 feet to stop, how many feet will be required to stop a car that is traveling at 60 mph?

*June 13, 2012 by Andre*

**Physics**

A little red wagon with mass 7.0kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of4.00 m/s and then is pushed 3.0m in the direction of the initial velocity by a force with a magnitude of 10.0 N a.) Use the work-energy theorem to ...

*October 15, 2012 by Frankie*

**Physics**

A little red wagon with mass 7.0kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of4.00 m/s and then is pushed 3.0m in the direction of the initial velocity by a force with a magnitude of 10.0 N a.) Use the work-energy theorem to ...

*October 15, 2012 by Frankie*

**Physics**

Two cars travel in the same direction along a straight highway, on at a constant speed of 38.0 mi/h and the other at 89.0 mi/h. (a) Assuming they start at the same point, how much sooner does the faster car arrive at a destination 44.0 mi away? (b) How far must the faster car ...

*September 9, 2013 by Kelsey*

**Physics**

A car of mass 1200kg starts from rest, accelerates uniformly to a speed of 4.0 meters per second in 2.0 seconds and continues moving at this constant speed in a horizontal straight line for an additional 10 seconds. the brakes are then applied and the car is brought to rest in...

*December 4, 2012 by Ken*

**physics**

a 2000kg car travelling west with a speed of 20m/s collides at an intersection with a 3000kg car travelling south at a speed of 20m/s. find the direction and magnitude of the velocity of the wreckage after the collision, assuming the collision was perfectly inelastic(that is, ...

*July 7, 2015 by Mostafa*

**Science 6 th grade**

Can you plz check this :0 True/False 1. Kilometers per hour describes the speed of an object. (1 point) true false * Multiple Choice 2. Which of the following reference points would allow you to observe the speed of a car that you are traveling in? (1 point) an airplane flying...

*May 4, 2015 by Stephanie*

**physics**

Jin is sitting on top of a hemispherical, frictionless igloo of radius 2.40 meters. His friend pushes him, giving him an initial speed. Jin slides along the igloo and loses contact with it after he has traveled 1.60 meters along the surface. What was his initial speed?

*February 4, 2015 by Yee*

**physics help**

1. A roller coaster car starts from rest and rolls down a frictionless track, reaching speed fv at the bottom. a. If you want the car to go two times as fast at the bottom, by what factor must you increase the height of the track? b. Does your answer to part (a) depend on ...

*November 7, 2008 by joyce*

**calculus**

2. A bullet is fired from the ground at an angle of 45o above the horizontal. What initial speed vo must the bullet have in order to hit a point 550 ft high on a tower located 600 ft away (ignoring air resistance)? 3. The Giant Ferris Wheel in Vienna has radius R = 30 m (...

*April 14, 2012 by nady*

**physics**

A first object is thrown vertically upward with some initial speed and some initial height above the ground. Simultaneously, a second object is thrown straight down with the same initial speed and same initial height above the ground. Before the second object reaches the ...

*August 24, 2010 by jake*

**physics**

a car is moving with a uniform speed of 15.0 m/s along a straight path. what is the difference covered by the car in 12.0 minutes?

*October 5, 2009 by jasmine*

**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.

*February 16, 2010 by lindsey*

**Physics**

if a car is moving around a circular track at a constant speed of 55 mi/h, is there a net force acting on the car?

*October 25, 2010 by Janice*

**hjysical science**

A car makes a turn with a 20m radius, the car's speed is 10m.s. what is the centripetal acceleration?

*August 11, 2011 by Tally*

**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.

*October 8, 2011 by Girl*

**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.

*September 4, 2012 by helen*

**science**

a car starts from a stop. at the end of 30 seconds its speed is 20 meters per second. what is the acceleration of the car?

*February 22, 2012 by morgan*

**PHYSICS**

At a drag race, a jet car travels 1/4 mile in 5.2 seconds. What is the final speed of the car and its acceleration?

*October 7, 2012 by Anonymous*

**physics**

A car moving with a speed of 85 km/h is brought to rest in a didtance of 60 m. How much time did the car take to stop?

*November 27, 2012 by Anonymous*

**physics**

a car driving down a road due south at a constant speed of 55 mph. what is the car's acceleration? how do you know

*May 28, 2013 by Anonymous*

**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

*February 20, 2014 by Reem*

**physics**

A car accelerates uniformly from rest to a speed of 73.6 mi/h in 7.68 s. Find the constant acceleration of the car. Answer in units of m/s 2

*October 21, 2014 by tom*

**Physics**

A car leaves skid marks 72m in length. The deceleration is 7.2m/s^2. What is the speed of the car before braking?

*January 23, 2015 by David*

**Science!!!**

A 2,500 kg car moves at 15 m/s^2; 15m/s^2 is the (blank) of the car. A. Acceleration B. Force C. Velocity D. Speed Is the answer D? Thank you

*February 11, 2015 by Callie*