Saturday

July 23, 2016
Number of results: 36,223

**College Physics 1**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
*January 31, 2010 by james*

**College Physics 1**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
*January 31, 2010 by james*

**Physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 5.14 m/s 2 . She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.78 s before Kathy. Stan moves ...
*October 3, 2013 by Tre*

**Physics 2**

A particle with a mass of 3.65×10^−24 kg and a charge of 6.40×10^−19 C starts at rest and is accelerated for a distance of 0.102 m through a uniform electric field having strength E = 7.25×10^4 N/C. What is the resulting speed of the particle(m/s)?
*July 18, 2015 by Skippy*

**AP Physics **

A driver in a car traveling at a speed of 62 mi/h sees a deer 112 m away on the road. Calculate the magnitude of the acceleration necessary for the car to stop just barely missing the deer (assuming that the deer does not move in the meantime). Answer in units of m/s2
*September 11, 2011 by Margo*

**physics**

A driver in a car traveling at a speed of 41.7 mi/h sees a deer 88 m away on the road. Calculate the magnitude of the acceleration necessary for the car to stop just barely miss- ing the deer (assuming that the deer does not move in the meantime). Answer in units of m/s2
*January 15, 2012 by Dustin*

**physics**

An experimental rocket car starting from rest reaches a speed of 560 km/h after a straight 450 m run on a level salt flat. Assuming that acceleration is constant, answer the following questios. (a) What was the time of the run? Your answer is incorrect. s (b) What is the ...
*September 30, 2011 by charly*

**physic**

Lai was driving north on Hwy 75 with a speed of 56.9 m/s when she heard on a CB that a patrolman was hiding 127.3 m north of where she is. Knowing that the patrolman can start clocking the car in 2.7 seconds, Lai decided to slow to 34.2 m/s. and immediately pressed on the ...
*August 24, 2011 by Shannon*

**sport and recreation**

hi my question is What is the diffrence between uniform and non uniform public services. thank you
*January 9, 2008 by Elizabeth*

**Physics**

3. An 80 kg skier is skiing down a slope (assume its frictionless) as shown in the diagram. The skier then hits a patch of sandy snow that applies a constant frictional force of 320 N directed up the slope. a. What is the skiers acceleration before hitting the sandy snow? b. ...
*January 27, 2015 by Krystal*

**Math**

What acceleration will cause a bus to travel a distance of 200 meters in 10 sec if it starts from rest
*January 21, 2013 by Matt*

**Physics**

A car without ABS (antilock brake system) was moving at 16.5 m/s when the driver hit the brake to make a sudden stop. The coefficients of static and kinetic friction between the tires and the road are 0.553 and 0.410, respectively. (a) What was the acceleration of the car ...
*June 13, 2011 by Anonymous*

**Physics - acceleration..need to find velocity**

I am given two points on an acceleration vs time graph: (-2,13),(4,0). When t = -2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (-13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints would be greatly ...
*October 21, 2011 by Belinda*

**electricity magnetism physics**

A proton is release from rest at the origin in a uniform electric field in the positive x direction with magnitude 850N/C. What is the change in electric potential energy when the proton travels to x = 2.50m
*October 28, 2013 by wi*

**Physics**

A 1200 kg car accelerates to the right at 7m/s2 along a special frictionless track. Determine the magnitude and direction of the force the engine exerts to accelerate the car? A wind blows heavy winds into the car's path.As a result the car's acceleration slows to 4.5m/s2. If ...
*July 18, 2011 by Edward*

**science**

the distance a car travels between the time the driver decides to stop the car and the time the driver puts on his brake is called the reaction distance how does the reaction distance change with speed
*March 27, 2014 by cassie*

**physics**

Two cars both start from rest and have the same constant acceleration. When radar is used to measure the velocity of each car, car A is found to be moving twice as fast as car B. At the instant the radar is used, car A has a displacement that is ______ times as great as the ...
*September 13, 2010 by Joey*

**physics**

Car A is travelling at 22.0 m/s and car B at 29.0 m/s. Car A is 300 m behind Car B when the drive of car A accelerates his car with an acceleration of2.4 m/s2. How long does it take Car A to overtake Car B?
*June 27, 2015 by shay*

**physics**

Cars A and B are racing each other along the same straight road in the following manner: Car A has a head start and is a distance DA beyond the starting line at t=0. The starting line is at x=0. Car A travels at a constant speed vA. Car B starts at the starting line but has a ...
*September 9, 2014 by Anonymous*

**Physics**

A uniform 2.0 kg cylinder can rotate about an axis through its center at O. The forces applied are: F1 = 5.70 N, F2 = 3.90 N, F3 = 4.30 N, and F4 = 7.00 N. Also, R1 = 12.8 cm and R3 = 4.50 cm. Find the angular acceleration of the cylinder.
*November 5, 2011 by Morgan*

**Physics **

A uniform 2.0 kg cylinder can rotate about an axis through its center at O. The forces applied are: F1 = 5.70 N, F2 = 3.90 N, F3 = 4.30 N, and F4 = 7.00 N. Also, R1 = 12.8 cm and R3 = 4.50 cm. Find the angular acceleration of the cylinder.
*November 6, 2011 by ALEX*

**Physics**

For a standard production car, the record for road test acceleration goes to the 1993 Ford RS200 Evolution. This car went from 0 to 2.911x10^1 m/s in 3.279x10^0 seconds. What is the average acceleration, expressed to 3 significant figures?
*October 13, 2010 by dylan*

**Physics**

A particle with a mass of 3.65×10−24 kg and a charge of 6.40×10−19 C starts at rest and is accelerated for a distance of 0.102 m through a uniform electric field having strength E = 7.25×104 N/C. What is the resulting speed of the particle?
*July 18, 2015 by Skippy*

**physics**

Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (a) Calculate the acceleration of the sled when starting, and compare it to the ...
*September 21, 2010 by Anonymous*

**physics**

A 0.0820 kg pair of fuzzy dice is attached to the rearview mirror of a car by a short string. The car accelerates at a constant rate, and the fuzzy dice hang at an angle due to the car's acceleration. If the dice hang at 10.5° from the vertical as the car accelerates, what is ...
*September 15, 2011 by Anonymous*

**Please check solution**

A uniform solid disk with a mass of 40.3 kg and a radius of 0.454 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk (a) What is the net torque produced by the two forces? (Assume counterclockwise is the positive direction (b) ...
*May 7, 2007 by Papito*

**Science**

A car runs at a constant velocity of 15m/s for 300sec and then accelerates uniformly to a velocity of 25m/s over a period of 20s. This velocity is mantained for 300s before the car is brought to rest with uniform deceleratiom in 30s. Draw a velocity time graph to represent the...
*March 30, 2016 by Anonymous*

**Physics**

1.) What is the acceleration of a car that increases its velocity from 0 to +14m/s in 10s? 2.) What is the acceleration of a car that maintains a constant velocity of - 14m/s for 10s? 3.) Seagulls are often observed dropping clams and other shellfish from a height to the rocks...
*September 18, 2014 by Becka*

**physics**

A car travels in a straight line for 4h at a constant spped 73km/h. What is its acceleration? Answer in units m/s^2
*September 10, 2013 by paul*

**physics**

the driver of a truck going 50 mph applies the brakes giving the truck a deceleration of 4.5 m/s^2 how long will it take the truck to come to a complete stop what distance will it cover
*July 14, 2016 by glenn*

**physics **

the driver of the truck going 50 mph applies the brakes giving the truck a deceleration of 4.5 m/s^2 how long will it take the truck to come to a complete stop what distance will it cover
*July 18, 2016 by steve *

**physics**

1 a cyclist moving on a circular track of radius 100m completes one revolution in 2 minutes what is his average speed and average velocity in one full revolution. 2 moving with uniform acceleration a body covers150m during 10 sec so that it covers 24m during the 10th sec wat ...
*May 19, 2012 by rocal*

**physics**

A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12 in 9.0 . Assume the merry-go-round is a uniform disk of radius 2.2 and has a mass of 650 , and two children (each with a mass of 29 ) sit opposite ...
*April 19, 2011 by cara*

**physics**

A car travels along a highway with a velocity of 24 m/s, west. The car exits the highway and 4.0 s later, its instantaneous velocity is 16 m/s, 45o north of west. What is the magnitude of the average acceleration of the car during the five-second interval?
*July 17, 2010 by axel*

**Physics**

An automobile driver puts on the brakes and decelerates from 30.0 m/s to 0 in 10.0 s. What distance does the car travel?
*December 3, 2010 by Jesse*

**physics**

a cheetah can accelerate from rest to 24 m/s in 2.0 s . Assuming the acceleration is constant over the time interval, a)what is the magnitude of the acceleration of the cheetah? b) what is the distance traveled by the cheetah in these 2.0 s.? c) a runner can accelerate from ...
*September 21, 2010 by tatiana*

**Physics**

A cheetah can accelerate from rest to 24.1 m/s in 2.02 s. a) Assuming the acceleration is constant over the time interval, what is the magnitude of the acceleration of the cheetah? b) What is the distance traveled by the cheetah in these 2.02 s? c) A runner can accelerate from...
*December 5, 2013 by jenny*

**physics**

If you accelerate due to gravity (free fall), your acceleration is -9.8 m/s2. In some fields, particularly aviation, this is referred to as 1 g of acceleration. If you were accelerating at 2.5 g, what would be your average acceleration? If you started from rest, what would be ...
*October 12, 2013 by iyzi*

**Physics**

The speed of the train is reduced from 36 km per hour to 9 km per hour whilst it travels a distance of 150 metres,if the retardation be uniform,find how much further it will travel before coming to rest
*August 15, 2014 by Faiz*

**Physics**

A car of mass 1900kgs accelerates from rest to a speed of 27ms-1 in 8.1s.Calculate the average rate at which kinetic energy is supplied to the car during the acceleration.
*March 15, 2014 by Gilbert*

**physics**

A 1000 kg car can accelerate from rest to a speed of 25 m/s in 10 s. What average power must the engine of car produce in order to cause this acceleration? Neglect friction losses
*August 7, 2015 by Muqadas*

**physics**

A train normally travels at a uniform speed of 74km/h on a long stretch of straight, level track. On a particular day, the train must make a 3.0min stop at a station along this track. If the train decelerates at a uniform rate of 1.3m/s2 and, after the stop, accelerates at a ...
*September 5, 2013 by Anonymous*

**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*

**physics**

A rock stuck in the tread of a 57.0 cm diameter bicycle wheel has a tangential speed of 3.00 m/s. When the brakes are applied, the rock's tangential deceleration is 1.40 m/s^2. A) What is the magnitudes of the rock's angular acceleration at t=1.60 s? B) At what time is the ...
*November 26, 2010 by Steph*

**physics**

a body travels from rest with acceleration 8ms find its velocity when it has covered a distance of 100m
*November 8, 2015 by ezekel ayuba*

**UST PHYSICE**

a body of mass 6kg is whirled in a horizontal circle of radios 1.5m with a uniform velocity 3m/s. calculate 1. the angular velocity 2. the centripetal acceleration.
*November 15, 2011 by Anaebo*

**Physics**

A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4.4 m down a q = 20° incline. The sphere has a mass M = 4.6 kg and a radius R = 0.28 m. Of the total kinetic energy of the sphere, what fraction is translational? KEtran/KEtotal = ?
*July 11, 2011 by Kyley*

**physics**

A car traveling in a straight line has a velocity of +5.5 m/s. After an acceleration of 0.65 m/s^2 , the car’s velocity is +8.9 m/s. In what time interval did the acceleration occur? Answer in units of s
*November 1, 2012 by leo*

**Physics**

A car comes to a stop in 6s from a velicity of 30m/s. what is its acceleration? At the same acceleration, how long would it take the car to come to a stop from a velocity of 40m/s?
*July 3, 2016 by Laarni jhuzel Navidad*

**physics**

A child slides down a hill on a toboggan with an acceleration if 1.5 m/s2^2. If she starts at rest, how far has she traveled in (a) 1.0s,(b) 2.0s, and (c) 3.0s?
*November 17, 2011 by taylor*

**physics**

An automobile starts from rest and 110 ft attains a speed of 30 mi/h. In what time has it traveled this distance and the is the acceleration?
*July 30, 2012 by zianna*

**physics**

show that the acceleration is 7.5 m/s² for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4s
*April 1, 2014 by Tracelle*

**physics**

Show that the acceleration is 7.5 m/s2 for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4 s
*April 9, 2014 by liz*

**Dahal**

A train is moving with a velocity of 20 m/s . when the brakes are applied , the acceleration is reduce to -0.5m/s2 . calculate the distance covered by the train before coming to rest.
*June 27, 2016 by Nikat*

**Physics**

At the instant a traffic light turns green, a car starts with a constant acceleration of 1.8 m/s(squared). At the same instant, a truck travelling at a constant velocity of 8.5 m/s passes the car. How far beyond the starting point will the car catch up to the truck?
*September 15, 2010 by Angela*

**math**

what constant acceleration, in SI units, must a car have to go from zero to 60mph in 10s? How far has the car traveled when it reaches 60mph? First, recognize or calculate that the final velocity is 60 mph = 88.00 ft/s = 26.822 m/s Then divided the metric (SI) final velocity ...
*February 12, 2007 by nick*

**PHYsics......**

A race car is on a straight track. The race car accelerates from rest, covering 100 m in 5 seconds. What is the acceleration of the race car in m/s^2?
*March 25, 2013 by i need help from anyone!*

**Physics**

A car travels around a curve banked at 45 degrees at 30 m/s. The radius of the track is 40m. What is the resultant force on the driver of the car?
*January 7, 2015 by Jody*

**Physics**

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.60 m. Two of the spheres have a mass of 2.20 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
*September 17, 2007 by NHS*

**physics**

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.30 m. Two of the spheres have a mass of 3.10 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
*November 17, 2010 by Ashley*

**physics**

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.10 m. Two of the spheres have a mass of 3.20 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
*October 4, 2012 by Donald*

**Physics**

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.10 m. Two of the spheres have a mass of 3.20 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
*October 10, 2012 by Anonymous*

**Physics**

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 2.50 m. Two of the spheres have a mass of 4.40 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
*February 23, 2016 by K*

**magnetism **

In earlier learning sequences we described how a static magnetic field cannot change the speed (and therefore kinetic energy) of a free charged particle. A changing magnetic field can, and this is one way particle beams are accelerated. Consider free protons following a ...
*December 3, 2013 by manu*

**eletromagnets**

In earlier learning sequences we described how a static magnetic field cannot change the speed (and therefore kinetic energy) of a free charged particle. A changing magnetic field can, and this is one way particle beams are accelerated. Consider free protons following a ...
*December 5, 2013 by BJ*

**physics**

In earlier learning sequences we described how a static magnetic field cannot change the speed (and therefore kinetic energy) of a free charged particle. A changing magnetic field can, and this is one way particle beams are accelerated. Consider free protons following a ...
*December 5, 2013 by J.O*

**physics**

A car traveling in a straight line has a velocity of +4.9 m/s. After an acceleration of 0.50 m/s2, the car's velocity is +7.3 m/s. In what time interval did the acceleration occur?
*September 27, 2010 by Anonymous*

**physics**

A car traveling in a straight line has a velocity of +4.9 m/s. After an acceleration of 0.50 m/s2, the car's velocity is +7.3 m/s. In what time interval did the acceleration occur? 1 s
*September 27, 2010 by Anonymous*

**physics**

A car traveling in a straight line has a velocity of +3.3 m/s. After an acceleration of 0.71 m/s2, the car's velocity is +8.8 m/s. In what time interval did the acceleration occur?
*October 14, 2012 by logan*

**physics**

A car traveling in a straight line has a velocity of +5.6 m/s. After an acceleration of 0.65 m/s2, the car’s velocity is +9.6 m/s. In what time interval did the acceleration occur?
*November 3, 2013 by Jordan*

**Physics**

Suppose that the coefficient of kinetic friction of the rubber of a car tire and the street is Uk = 0.8. What is the deceleration of the car on a flat street if the driver brakes sharply, so all the wheels are locked and skidding?
*October 23, 2010 by Lisa*

**Physics**

I don't know if my answers are right. D: 1)Why is a time interval always positive? I'm not really sure but I wrote down something with vectors and scalars. 2)If the average acceleration of a car is zero in a given time interval, what can you tell about the displacement of the ...
*October 1, 2014 by Selena*

**Physics**

A commuter backs her car out of her garage with a constant acceleration of 1.40 m/s2. (a) How long does it take her to reach a speed of 1.60 m/s? s (b) If she then brakes to a stop in 0.8 s, what is her (constant) deceleration? m/s2
*September 10, 2014 by Jon*

**Physics grade 11-**

A car traveling at 72 km/hr hits a tree. the driver, who has a mass of 55.0 kg comes to a rest 0.10s after the impact. What is the force that acts on the driver?
*December 11, 2015 by Maddie *

**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**

The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the total force on a(n) 75 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 66 m/s in 4.5 s? Answer in units of kN
*November 22, 2014 by Kyle*

**Science**

The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the total force on a(n) 94 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 60 m/s in 8.2 s? Answer in units of kN
*November 29, 2014 by jocelyn*

**Physics**

The acceleration of gravity is 9.8 m/s^2 . What is the magnitude of the total force on a(n) 72 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 61 m/s in 7.8 s? Answer in units of kN
*November 30, 2014 by Jackie*

**physics**

The acceleration of gravity is 9.8 m/s 2 . What is the magnitude of the total force on a(n) 87 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 41 m/s in 5.3 s? Answer in units of kN
*November 30, 2014 by jo*

**Physics**

For a standard production car, the highest road-tested acceleration ever reported occurred in 1993, when a Ford RS200 Evolution went from zero to 26.8 m/s (60 mi/h) in 2.557 s. Find the magnitude of the car's acceleration. Number Units the tolerance is +/-4%
*August 31, 2013 by RW*

**Physics**

You are the juror of a case involving a drunken driver whose 972 kg sports car ran into a stationary 2094 kg station wagon stopped at a red traffic light. The cars stuck together and slid with locked wheels for 11.0 m before coming to rest. The coefficient of sliding friction ...
*October 7, 2014 by Katrina*

**Physics**

A Particle moving with uniform acceleration is found to travel 35m in the 8th second and 51m in the 9th second. its velocity in m/sec at the beginning of 11 seconds is a> 49 b> 45 c> 47 d> 51
*June 30, 2015 by ChuLbuLi*

**Physics **

**I JUST NEED THE STEPS ON HOW TO SOLVE THE PROBLEMS** An object experiences an acceleration of 6.8m/s^2. As a result, it accelerates from rest to 24m/s. How much distance did it travel during that acceleration? A car which is traveling at a velocity of 15m/s undergoes an ...
*November 8, 2012 by Elyssa*

**maths**

(a) A car accelerates from 0 to 30.0 m s-1 in 6.0 seconds, travels at a constant 30.0 m s-1 for 21.0 seconds, and then brakes to a stop in 3.0 seconds. (i) Draw a velocity-time graph illustrating this motion (ii) Calculate the acceleration (assumed constant) in each section of...
*March 13, 2013 by Kate*

**Physics**

A car is traveling around a horizontal circular track with radius r = 240 m at a constant speed v = 25 m/s as shown. The angle èA = 34° above the x axis, and the angle èB = 65° below the x axis. I found the car's acceleration to be 2.6 m/s^2 (a=v^2/r). Now I need to know the x...
*September 11, 2010 by Joy*

**physics**

A passenger sitting in the rear of the bus claims that he was injured when the driver slammed on the brakes, causing a suitcase in front of the bus to come flying towards him. If you were the judge in this case, what disposition would you make and why?
*September 21, 2012 by krizha*

**physics**

An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 15.0 s. What distance does the car travel?
*June 7, 2010 by sarah*

**grade 11 physics**

Cathy takes the bus home from work. In her hand she holds a 2 kg cake box, tied together with a string. As she ascends the steps into the bus,the box accelerates upward at a rate of 2.5m/s^2. what is the force exerted on the string? Fg=ma =2*9.8 =19.6N Fn=ma-Fg =2*2.5-(-19.6...
*January 24, 2010 by Sarah N H*

**Physics**

A car traveling at 20 m/s applies the brakes. The coefficients of static and kinetic friction between the tires and the road are 0.80 and 0.50 respectively. (A) Determine the stopping distance if the car is able to stop as quickly as possible without skidding. (B) Determine ...
*October 25, 2012 by Brittney*

**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 dragster starts from rest and accelerates down the track. Each tire has a radius of 0.360 m and rolls without slipping. At a distance of 360 m, the angular speed of the wheels is 292 rad/s. -------------------------------------------------------------------------------- (d) ...
*April 5, 2008 by Oliver*

**physical science**

A car traveling at 22 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is its acceleration?
*May 9, 2016 by Shannah*

**math,science**

A car traveling at 22 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is its acceleration?
*May 9, 2016 by Ally*

**Physics**

A range in a national park is driving at 47 km/h when a deer jumps onto the road 70m ahead of the vehicle . After a reaction of t seconds, the ranger applies the brakes to produce an acceleration of -2.00 m/s^2. What is the maximum reaction time allowed if the ranger is to ...
*February 14, 2011 by Shannon*

**physics**

A uniform horizontal rod of mass 2.4 kg and length 0.86 m is free to pivot about one end as shown. The moment of inertia of the rod about an axis perpendicular to the rod and through the center of mass is given by I = (m*l^2)/12 If a 6.8 N force at an angle of 69 to the hor- ...
*February 12, 2012 by Latane*

**Physics**

A car travels at a speed of 25 m/s on a flat stretch road. The driver must maintain pressure on the accelerator to keep the car moving at this speed. The car's engine is doing work on the car, yet the kinetic energy of the car is not changing. What is happening to the energy ...
*August 5, 2013 by Rachel.*

**Physics**

A car travels at a speed of 25 m/s on a flat stretch road. The driver must maintain pressure on the accelerator to keep the car moving at this speed. The car's engine is doing work on the car, yet the kinetic energy of the car is not changing. What is happening to the energy ...
*August 5, 2013 by Rachel.*

**physics**

A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
*May 14, 2011 by Sandhya*

**physics**

A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
*May 15, 2011 by Sandhya*