Friday

April 18, 2014

April 18, 2014

Number of results: 101,234

**physics asap**

A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is? On this question I asked my teacher I am suppose to get 2000 N and I dont get how to get it.
*Wednesday, October 17, 2007 at 10:16am by Soly*

**physics help**

A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is? when i work this out with the formula that you gave me, i get 2525 instead of 2000 N
*Wednesday, October 17, 2007 at 10:42am by Soly*

**physics**

A block of mass m1 = 2.4 kg initially moving to the right with a speed of 3.3 m/s on a frictionless, horizontal track collides with a spring attached to a second block of mass m2 = 4.1 kg initially moving to the left with a speed of 1.5 m/s as shown in figure (a). The spring ...
*Monday, October 14, 2013 at 2:19pm by Leticia*

**physics**

A duck has a mass of 2.10 kg. As the duck paddles, a force of 0.110 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.240 N in a direction of 47.0° south of east. When these forces begin to act, the velocity of the duck is 0.120 m/...
*Thursday, February 21, 2013 at 9:30pm by bebenel*

**science**

A 500 kg truck moving at 30 m/s strikes a parked 300 kg car. They connect together and move forward. (A) What kind of collision is this (elastic or inelastic)? (B) What is the momentum of the truck before it strikes the car? (C) What is the speed of the car and truck as they ...
*Thursday, March 17, 2011 at 6:36pm by shantae*

**Physics**

A car is driven east for a distance of 46 km, then north for 27 km, and then in a direction 35° east of north for 24 km. Determine the angle (from east) of the car's total displacement measured from its starting direction.
*Monday, September 13, 2010 at 10:53am by Evin*

**Physics**

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 Vo. Car 1 begins to move at t=0, speeding up with a constant acceleration Ax. Car 2 continues to move with a ...
*Tuesday, May 26, 2009 at 9:36pm by TchrWill*

**pop**

A fast-moving massive car has a head-on collision with a slow-moving light car. Upon which is the impulse greater? A) The massive car. B) The light car. C) Impulse is the same on both. D) More information is needed to correctly answer this.
*Sunday, February 19, 2012 at 3:57pm by Anonymous*

**principles of physics**

A fast-moving massive car has a head-on collision with a slow-moving light car. Upon which is the impulse greater? A) The massive car. B) The light car. C) Impulse is the same on both. D) More information is needed to correctly answer this.
*Sunday, February 19, 2012 at 5:03pm by britches*

**physics emergerncyy!**

A particle of mass m1 = 2.5 kg moving along the x axis collides with a particle of mass m2 = 4.7 kg initially at rest. The incoming particle is deflected in the direction 24 degrees above the x axis, whereas the target particle moves off at 14 m/s at 39 degrees below the x ...
*Saturday, November 19, 2011 at 11:23pm by joe*

**physics word problem**

A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is? On this question I asked my teacher I am suppose to get 2000 N and I dont get how to get it.
*Tuesday, October 16, 2007 at 10:12pm by Soly*

**Calculus**

A team has been working to convert diesel-powered cars to run just as efficiently on used cooking oil! They want to compare the mileage and speed of their prototype with that of the diesel-powered car. The prototype is 100 meters south of an intersection, while the diesel car ...
*Monday, August 1, 2011 at 1:29pm by Cynthia*

**physics**

A 56.0-kg skater is traveling due east at a speed of 2.80 m/s. A 77.0-kg skater is moving due south at a speed of 4.40 m/s. They collide and hold on to each other after the collision, managing to move off at an angle south of east, with a speed of vf. Find (a) the angle and (b...
*Thursday, October 16, 2008 at 7:59pm by chris*

**physics**

A 59.0-kg skater is traveling due east at a speed of 1.80 m/s. A 61.0-kg skater is moving due south at a speed of 6.20 m/s. They collide and hold on to each other after the collision, managing to move off at an angle south of east, with a speed of vf. Find (a) the angle and (b...
*Monday, October 22, 2012 at 8:10pm by sammy*

**physics**

A 1000 kg car has four 20 kg wheels. When the car is moving, what fraction of its total kinetic energy is due to rotation of the wheels about their axles? Assume that the wheels have the same rotational inertia as uniform disks of the same mass and size. 1 Why do you not need ...
*Wednesday, January 5, 2011 at 9:34am by Joey*

**physics**

A railroad car of mass 26500 kg is released from rest in a railway switchyard and rolls to the bottom of a slope Hi =8 m below its original height. At the low point, it collides with and sticks to another car of mass 20000 kg. The two cars roll together up another slope and ...
*Tuesday, February 22, 2011 at 1:32pm by micha*

**science (check answers)**

4.how does the kinectic energy of a 10,000-kg train traveling at a speed of 10 m/s compare with that of a 2,600-kg compact car traveling twice as fast? A.the train has less kinectic energy than the car. B.the train has more kinectic energy than the car.(I PICK THIS) C.the ...
*Wednesday, January 29, 2014 at 12:53pm by annabelle*

**physics**

A car moving at 35 mi/h is stopped by jamming on the brakes and locking the wheels. The car skids 53 ft before coming to rest. How far would the car skid if it were initially moving at 56 mi/h?
*Monday, August 1, 2011 at 3:46pm by Ashley*

**physic**

A car is driven east for a distance of 44 km, then north for 25 km, and then in a direction 27° east of north for 28 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Wednesday, March 9, 2011 at 12:00am by keef lam*

**science(1answer)**

4.how does the kinectic energy of a 10,000-kg train traveling at a speed of 10 m/s compare with that of a 2,600-kg compact car traveling twice as fast? A.the train has less kinectic energy than the car. B.the train has more kinectic energy than the car.(I PICK THIS) C.the ...
*Wednesday, January 29, 2014 at 1:37pm by annabelle*

**physics**

A car is driven east for a distance of 42 km, then north for 25 km, and then in a direction 31° east of north for 26 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Friday, September 18, 2009 at 7:41pm by blah*

**physics**

A car is driven east for a distance of 49 km, then north for 21 km, and then in a direction 30° east of north for 27 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Thursday, March 10, 2011 at 5:27pm by tom*

**physics**

A car is driven east for a distance of 41 km, then north for 21 km, and then in a direction 30° east of north for 25 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Thursday, September 8, 2011 at 7:28pm by jessica*

**math**

A 1000·kg car traveling with a velocity of 13·m/s north collides head-on with a 2000·kg truck traveling with a velocity of 17·m/s south. Immediately after the collision, the velocity of the car is 11·m/s south. Taking north as the positive direction, what is the velocity of ...
*Thursday, October 27, 2011 at 8:13pm by jr*

**physics**

A 5kg object moves to the right with a speed of 2m/s. It collides in a perfectly elastic collision with a 2 kg object moving to the left at 5m/s.What is the total kinetic energy after the collision? In elastic collisions KE is conserved so KE_i =KE_f KE_f=1/2(5)(2)^2+ 1/2(2)(5...
*Wednesday, October 24, 2007 at 5:05pm by Tammy*

**Physics**

A boy and his skateboard have a combined mass of 64 kg. If he is moving with a speed of 3.2 m/s, and collides with a stationary skateboarder whose mass (including his skateboard) is 96 kg, with what speed will the two skateboarders move immediately after the collision? assume ...
*Wednesday, August 14, 2013 at 12:38am by Jam*

**science**

Arrange the amount of momentum of these objects from the most momentum to the least momentum. When placing the objects in the correct order, record the value of their momentum. 1. A 0.4 kg baseball thrown by a major league pitcher at 120 m/s. 48kg*m/s 2. A 0.04 kg bullet ...
*Wednesday, October 28, 2009 at 3:00pm by please help(:*

**PHYSICS**

Two cars collide at an intersection. Car A, with a mass of 2000kg, is going from west to east, while car B, of mass 1300kg, is going from north to south at 15.0m/s. As a result of this collision, the two cars become enmeshed and move as one afterwards. In your role as an ...
*Friday, March 30, 2012 at 9:28pm by char*

**Physics**

A 1250 kg car rams into the back of a slower moving truck having a mass of 2500 kg. During the collision the two vehicles become entangled so that they move off together afterward. If before the collision the car was going 20 m/s and the truck was going 14 m/s, what was their ...
*Thursday, July 12, 2012 at 1:33pm by Jessica*

**Physics**

a 5 kg block with a speed of 3 m/s collides with a 10 kg block that has a speed of 2 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.5 m/s. a) what is the speed of the 5 kg block ...
*Sunday, January 13, 2008 at 10:22pm by Sarah*

**physics**

A car is equipped with a bumper that is designed to absorb collisions. The bumper is mounted to the car using pieces of flexible tubing. The car is traveling at 1.5 m/s when it collides with a rigid black wall. If the wall exerts an average force of 44.1 kN on the car as the ...
*Friday, October 5, 2012 at 12:34am by Vmel*

**physics**

A 2.09 kg block is placed on top of a 10.9 kg block. A horizontal force of F = 63.3 N is applied to the 10.9 kg block, and the 2.09 kg block is tied to the wall. The coefficient of kinetic friction between all moving surfaces is 0.117. There is friction both between the masses...
*Sunday, October 10, 2010 at 12:42am by shel*

**Physics**

V^2 = Vo^2 + 2a*d. a = (V^2-Vo^2)/2d. a = (0-(34)^2)/2200 = -0.525 m/s^2. m*g = 8810N. m = 8810/9.81 = 899 kg = Mass of car. F = m*a = 899 * (-525) = -472 N.
*Thursday, February 7, 2013 at 2:46pm by Henry*

**physics**

A mechanic pushes a 2.50 x 10^3 kg car from the rest to a speed of v, doing 5000J of work in the process. During this time, the car moves 25.0 m. Neglecting friction between car and road, find (a) v and (b) the horizontal force exerted on the car.
*Monday, October 22, 2007 at 10:42pm by Anonymous*

**college physics**

I will have to assume that they were all moving in the same direction. Momentum is conserved here, energy is not. Initial momentum 4*5 + 10*3 + 3*4 = 62 kg m/s final momentum (4+10+3)v = 17 v so 17 v = 62 v = 3.64 However I do not think they will collide if they are all moving...
*Sunday, June 1, 2008 at 5:18pm by Damon*

**Physics**

A train moving at a constant speed of 61.0 km/h moves east for 35.0 min, then in a direction 50.0° east of due north for 10.0 min, and then west for 49.0 min. What is the average velocity of the train during this run? What is the magnitude of that velocity? What is the ...
*Monday, January 27, 2014 at 10:39pm by Anonymous*

**Physics**

A 1000kg car accelerates from 3m/s East to 24m/s East at a rate of 3m/s. If the force of friction is 500N West; how much ower must the car exert? If heat and mechanical losses make the car only 60% efficient, what total power must be exerted to accomplish the acceleration in ...
*Tuesday, February 8, 2011 at 11:57am by Shannon*

**physics**

How do i find this? A shooting star is a meteor that burns up when it reaches Earth's atmosphere. Many of these meteoroids are quite small. Calculate the kinetic energy of a meteoroid of mass 6.0 g moving at a speed of 45 km/s and compare it to the kinetic energy of a 1400-kg ...
*Sunday, April 4, 2010 at 9:44pm by raina*

**physics**

A 20 kg shopping cart moving at a velocity of 0.5 m/s collides with a store wall and stops. The momentum of the shopping cart decreases?
*Saturday, February 21, 2009 at 3:09pm by Bella*

**College Physics**

A 3400 kg open railroad car coasts along with a constant speed of 7.50 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 5.10 kg/min.Ignoring friction with the tracks, what is the speed of the car after 85.0 min ?
*Sunday, March 14, 2010 at 11:04pm by Sandy*

**calculus**

A team has been working to convert diesel-powered cars to run just as efficiently on used cooking oil! They want to compare the mileage and speed of their prototype with that of the diesel-powered car. The prototype is 100 meters south of an intersection, while the diesel car ...
*Monday, August 1, 2011 at 8:52am by need help!*

**Math**

A team has been working to convert diesel-powered cars to run just as efficiently on used cooking oil! They want to compare the mileage and speed of their prototype with that of the diesel-powered car. The prototype is 100 meters south of an intersection, while the diesel car ...
*Tuesday, August 2, 2011 at 2:23am by Anonymous*

**Math**

Answer: 7/10 kg of cherries Tiffany: 2/5 kg = 4/10 kg Linda: 4/10 kg - 1/10 kg = 3/10 kg 4/10 kg + 3/10 kg = 7/10 kg I hope this helps.
*Wednesday, January 22, 2014 at 9:32pm by MathGuru*

**Physics**

Four people sit in a car. The masses of the people are 41 kg, 47 kg, 53 kg, and 55 kg. The car's mass is 1020 kg. When the car drives over a bump, its springs cause an oscillation with a frequency of 1.00 Hz. What would the frequency be if only the 41-kg person were present? ...
*Friday, March 30, 2012 at 11:54pm by Priyanka*

**AP Physics**

a ball of mass 3 kg is moving with a velocity of 10 m/s. This ball collides with a second ball of mass 0.5 kg that is at rest. After the collison, the first ball is at rest. What is the velocity after the collison of the second ball if the collison is inelastic?
*Tuesday, October 18, 2011 at 11:51pm by Kailyn*

**AP Physics**

a ball of mass 3 kg is moving with a velocity of 10 m/s. This ball collides with a second ball of mass 0.5 kg that is at rest. After the collison, the first ball is at rest. What is the velocity after the collison of the second ball if the collison is inelastic?
*Tuesday, October 18, 2011 at 11:53pm by Kailyn*

**fizik**

1. A sports car travelling east at 48.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 22 m/s in 4.10 s a) Find the magnitude and direction of the car’s acceleration as it slows down b) Calculate the distance traveled during the 4.10 s ...
*Sunday, February 20, 2011 at 7:16am by alya*

**PHYSICS**

A 0.445 kg ice puck, moving east with a speed of 2.82 m/s, has a head-on collision with a 0.918 kg puck initially at rest. Assuming a perfectly elastic collision, what will be the speed and direction of each object after the collision? speed of the ice puck ? Direction: west ...
*Saturday, October 31, 2009 at 4:51pm by Jennifer*

**physics**

an empty coal car is moving along the tracks to a loading chute a 7km/hr., the mass of the empty car is 2000kg what is the speed of the loaded coal if the total mass of the car is now 10000 kg? give yuo answer in meters per second.
*Tuesday, September 27, 2011 at 8:23pm by mercedes*

**Physics**

a 2.0 kg block moving at 8 m/s on a frictionless surface collides elastically with a block at rest. The first block moves in the same direction at 2 m/s. What is the second block's mass?
*Wednesday, April 3, 2013 at 10:10pm by Henry *

**Physics 141**

A 45.0-kg skater is traveling due east at a speed of 2.85 m/s. A 72.5-kg skater is moving due south at a speed of 7.35 m/s. They collide and hold on to each other after the collision, managing to move off at an angle θ south of east, with a speed of vf. Find the following...
*Tuesday, March 11, 2014 at 9:00pm by dakota22*

**Physical Science**

Two cars are moving in identical conditions, one car is moving 3 times how much farther will this fast car travel?
*Friday, February 25, 2011 at 1:00pm by Miguel*

**physics**

Two people are pushing a disabled car. One exerts a force of 400 N east, the other a force of 200 N east. What is the net force exerted on the car?
*Tuesday, November 5, 2013 at 7:47pm by Anonymous*

**Physics**

A railroad car with a mass of 1.93 104 kg moving at 3.24 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.16 m/s. (a) What is the speed of the three joined cars after the ...
*Sunday, April 24, 2011 at 10:58pm by Elizabeth*

**physics**

Two cars both travel along a straight road Northbound. At t = 0, the car 1 is 190.6 m further north than car 2. Also at t = 0, car 1 is travelling at 24.3 m/s, and car 2 is travelling at 5.7 m/s. Car 1 is slowing down with an acceleration of magnitude 0.28 while car 2 is ...
*Wednesday, September 19, 2012 at 9:41pm by Ty*

**Physics**

A railroad car moves under a grain elevator at a constant speed of 3.70 m/s. Grain drops into the car at the rate of 580 kg/min. What is the magnitude of the force needed to keep the car moving at constant speed if friction is negligible? F = Ma -> R * V(rel)
*Tuesday, May 22, 2012 at 11:36am by Dan*

**physics**

The Mini Cooper is rated at a maximum power of 115. hp (1 hp=746 W), when moving at 80.0 km/h. Assume that the net force accelerating the car is constant. The total mass of the car with a rider and some fuel is 1230 kg. How many seconds will it take for this car to go from ...
*Tuesday, January 11, 2011 at 7:51pm by noreen*

**physics**

V=53•10⁶ ft³=1.5•10⁶ m³ h=45720≈46000 m The density of the air ρ=2•10⁻³ kg/m³ The buoyant force is F=mg= ρVg=2•10⁻³•1.5•10⁶•9.8 =29400≈ 30000 N Answer (d) M=800 kg m₀=(F-Mg)/g= F/g – M= ρVg...
*Wednesday, January 1, 2014 at 2:41pm by Elena*

**Physics**

A railroad car with a mass of 1.91 multiplied by 104 kg moving at 2.86 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.40 m/s. What is the speed of the three joined cars after ...
*Wednesday, February 16, 2011 at 9:04pm by Miranda*

**physics**

a 1500 kg car moving at 20 m/s strikes a truck waiting at a traffic light, hooking the bumpers. The two continue to move together at 10 m/s. What was the mass of the truck?
*Sunday, March 30, 2014 at 11:11pm by garrett*

**physics**

A green 4 kg toy car with a speed of 5 m/s collides head-on with a stationary yellow 1-kg car. After the collision, the cars are locked together with a speed of 4 m/s. How much kinetic energy is lost in the collision? a. what is the kinetic energy of the green 4-kg toy care ...
*Wednesday, November 7, 2012 at 4:39pm by paulie*

**physics**

A 5.0 kg block with a speed of 2.8 m/s collides with a 10 kg block that has a speed of 2.0 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.5 m/s. What is the velocity of the 5.0 kg block ...
*Sunday, October 30, 2011 at 8:45pm by Chelsey *

**PHY**

A car is driven east for a distance of 43 km, then north for 25 km, and then in a direction 26° east of north for 26 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Thursday, March 10, 2011 at 2:59am by alex*

**physical**

A car is driven east for a distance of 43 km, then north for 25 km, and then in a direction 26° east of north for 26 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Friday, March 11, 2011 at 12:41am by alexx*

**Physics**

A car is driven east for a distance of 46 km, then north for 29 km, and then in a direction 29° east of north for 22 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Sunday, March 10, 2013 at 4:03pm by Michael*

**physics**

When four people with a combined mass of 320 kg sit down in a car, they find that the car drops .80 cm lower on its springs. THen they get out of the car and bounce it up and down. What is the frequency of the car's vibration if its mass (empty) is 2.0 X 10^3 kg? The spring ...
*Thursday, March 15, 2007 at 4:37pm by sam*

**physics**

. Compared a car (mass of 2000 kg) moving at 10 miles per hour, how much kinetic energy (in Joules) does that same car have when it moves at 20 miles per hour? At 50 miles per hour? 75 miles per hour?
*Monday, March 12, 2012 at 6:02pm by Hector*

**now for my physics hw..**

A railroad car with a mass of 1.99 104 kg moving at 2.80 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.52 m/s. (a) What is the speed of the three joined cars after the ...
*Thursday, December 15, 2011 at 11:22pm by Kelley*

**Physics**

A railroad car with a mass of 1.86 104 kg moving at 2.80 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.40 m/s. (a) What is the speed of the three joined cars after the ...
*Monday, October 22, 2012 at 5:44pm by Angela*

**fizik**

1. A sports car travelling east at 48.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 22 m/s in 4.10 s a) Find the magnitude and direction of the car’s acceleration as it slows down b) Calculate the distance traveled during the 4.10 s ...
*Sunday, February 20, 2011 at 8:43am by alya*

**college**

100 kg car moving at 22 m/s runs into a horizontal spring with spring constant 4200 N/m. How far does the car displace the spring before coming to a stop?
*Saturday, September 11, 2010 at 8:21pm by Angela*

**science**

a car with a mass of 2000 kg moves along the ice with a constant velocity of 10.0 m/s. What is the car's momentum? a. 200.0 N b. 20.000 N c. 200.0 kg x m/s d. 20,000 kg x m/s I know it is twenty thousand, I'm unsure of the measurements or units. Please explain.
*Wednesday, September 21, 2011 at 6:42pm by kenny*

**Physics**

Car A passes Car B on the highway. Rlative to car A's movement, Car B is moving at a rate of 9 mph backward. If the speed of Car A is 98 mph, what us the speed of Car B?
*Friday, March 22, 2013 at 12:15pm by Renay*

**physics**

the momentum of 900kg car initially moving north at 10m/s increases by 10,800. calculate the final velocity of the car.
*Sunday, December 4, 2011 at 7:03am by gem*

**physics**

1.A truck with a mass 5000 kg is heading East at 20 m/s. Meanwhile a car with a mass 2500 kg is heading North at 30 m/s. The two vehicles collide at an intersection, get stuck together, and the wreckage keeps moving to some direction.find the speed of the wreckage and the ...
*Tuesday, July 8, 2008 at 3:22am by Sandhya*

**Physics**

A 6.00 kg ball (ball 1), moving to the right at a velocity of +1.00 m/s on a frictionless table, collides head-on with a stationary 7.50 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 m/s ball 2 m/s...
*Sunday, November 2, 2008 at 10:08pm by Brandon*

**physics**

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

**physics**

A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.
*Tuesday, September 13, 2011 at 6:40am by neha*

**physics**

A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.???
*Tuesday, September 13, 2011 at 6:48am by neha*

**physics**

an electric motor represented by the 4 ohm resistor below accelerates a 20g car for 40 sec. it then collides with a perfectly inelastic collision with another car that has a mass of 10g and is traveling half the first car but in the opposite direction. what is the new velocity...
*Sunday, June 9, 2013 at 11:02pm by michael*

**physics please help**

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 ball 2 (b) ...
*Tuesday, November 2, 2010 at 10:44am by jason*

**physics**

Car moving down road accelerates at uniform rate 2.8 m/s/s for 4.63 s to reach a speed of 106.7 m/s. 1) How fast was the car initially moving? 2) What distance did it travel during the a/c/c.?
*Wednesday, October 17, 2007 at 2:40pm by jane*

**maths**

i m having a problem that the angle between north east will be 35 or 55 because if we are considering north east the hiker is moving fom north to east
*Friday, February 15, 2013 at 6:16am by bushra*

**physics**

a(n) 6kg object moving with a speed of 8.3 m/s collides with a(n) 18kg object moving with a velocity of 10 m/s in a direction 23(degrees) from the initial direction of motion of the 6kg object. What is the speed of the two objects after the collision if they remain stuck ...
*Sunday, October 30, 2011 at 1:38pm by Anonymous*

**Physics**

Two cars are travelling in the same direction along a street. Car A collides with Car B and they lock together. Calculate tgeur velocity after the collision. Before: Car A: mass of 1001kg. Velocity of 12m/s Car B: mass of 1200kg Velocity of 10m/s After: V=?
*Sunday, February 13, 2011 at 7:32am by Laureen*

**Science PHYSICS**

SO desperate with help with this. What is the magnitude of the acceleration that this force will cause when applied to a car with a mass of 1.1x10³Kg Then calculate the final speed of the car (above) assuming that it was standing still initially and that the force of 5.0 x 10...
*Wednesday, March 24, 2010 at 8:29am by Alice*

**gotta have answer by 11:59 tonight!!!**

A railroad car with a mass of 1.99 104 kg moving at 2.80 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.52 m/s. (a) What is the speed of the three joined cars after the ...
*Thursday, December 15, 2011 at 11:52pm by Kelley*

**math**

speed of train A --- x speed of train B ---- x+10 time for A's trip = 220/x time for B's trip = 270/(x+10) 220/x = 270/(x+10) 270x = 220x + 2200 50x = 2200 x = 44 take it from here.
*Saturday, April 27, 2013 at 10:09am by Reiny*

**physics**

A 2000 kg car is moving with a velocity of 50 km/hr. What is its kinetic energy? If the car reduces its speed by half, by what factor is the kinetic energy changed?
*Thursday, June 30, 2011 at 9:36pm by rosie*

**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?
*Sunday, September 19, 2010 at 9:44pm by Angela*

**Physics**

Hey I'm not sure how to solve this problem: An 1840 kg car is moving to the right at a constant velocity of 2.94 m/s. What's the netforce? What's the netforce if the car would be moving to the left? I'm thinking that the net force going right and the net force going left is ...
*Tuesday, September 16, 2008 at 4:57pm by Robert*

**Physics**

Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 433 N and F2 = 354 N. (Assume up and to the right as positive directions.) F1 is 10 degrees west of the y axis, F2 is 30 degrees east of the y axis. (a)What is the direction...
*Wednesday, January 30, 2013 at 10:57am by Dan*

**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 ...
*Thursday, October 4, 2012 at 5:48pm by Brandon*

**Physics**

Can you show work please..? 1. Joe is sledding down a snow hill when he collides with Mike half way down the hill. Joe and the sled have a mass of 65 kg and their velocity before the collision was 12 m/s. If Mike has a mass of 55 kg, what velocity would Joe, Mike, and the sled...
*Sunday, January 16, 2011 at 9:55pm by Amy*

**physics**

At the moment car A is starting from rest and accelerating at 5.0 m/s2, car B passes it moving at a constant speed of 45m/s. How long will it take car A to catch up with car B?
*Thursday, January 17, 2013 at 10:42pm by Marissa*

**physics**

truck A of mass 2,5 x 10(4) kg approaches a second truck B of mass 2 x 10(4) kg with a velocity of 12 m.s -1 and collides with it. After collision the two trucks move apart with equal but opposite momenta. Calculate what the velocity of B was before the collision
*Thursday, February 10, 2011 at 2:12pm by Claudia*

**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 ...
*Wednesday, December 12, 2012 at 10:11pm by alice*

**Physics**

A 1000 kg car is moving at a constant speed of 7 m/s when it hits the back bumper of another car with 1200 kg of mass moving in the same direction at a constant speed of 6 m/s. As a result of the collision both bumpers get coupled. Show all work and calculations. 1. What is ...
*Friday, January 6, 2012 at 9:30pm by Will*

**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.
*Wednesday, October 5, 2011 at 7:02pm by Help*

**physics**

A softball of mass 0.220 kg that is moving with a speed of 5.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 3.9 m/s.
*Sunday, January 10, 2010 at 4:59pm by Anonymous*

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