Monday

July 28, 2014

July 28, 2014

Number of results: 30,540

**physicss**

What average force is required to stop an 1100 kg car in 9.1 s if it is traveling at 83 km/h?
*November 1, 2010 by Devon*

**physics**

What average force is required to stop an 1100-kg car in 8.0 s if it is traveling at 95 km/h? i got the answer to be 13062.5 N. i don't think that's right...
*November 21, 2007 by beckii*

**physics: BOB or DRWLS follow up question**

What average force is required to stop an 1100-kg car in 8.0 s if it is traveling at 95 km/h? i understand what you both did, but why can't you use the V = Vo + at equation and solve for acceleration there and use that in the EF = ma equation?
*November 21, 2007 by beckii*

**PHYSICS**

(1 pt) An aricraft carrier has a mass of 8.9 x10^7kg and can cruise at 55 km/h. a) What is the work required to stop it? J b) What constant force could stop it in 6 km? N a) If only half of the work required to stop it is done, what is its final speed? km/h
*November 21, 2010 by applebottom*

**physics**

a 1540 kg truck is traveling at 95 km/hr. what average force is required to stop in 10 seconds
*November 3, 2011 by cody*

**Physics**

What is the magnitude of the average force required to stop an 1500 kg car in 8.0 s if the care is traveling at 95 km/h? Sum of F = ma?
*June 13, 2012 by Mike *

**Physics**

A car moving initially at a speed of 80 km/h and weighing 13,000 N is brought to a stop ina distance of 61 m. Find(a) the braking force and (b) the time required to stop. Assuming the same braking force, find (c) the distance and (d) the time required to stop if the car were ...
*February 24, 2014 by Anonymous*

**Physics**

What average force is required to stop an 1700 car in 7.0 if the car is traveling at 75 ?
*September 8, 2010 by Ariel*

**Physics**

What average force is required to stop an 1700 kg car in 7.0 s if the car is traveling at 75 km/h?
*September 8, 2010 by Ariel*

**physics**

What average force is required to stop an 1300 -kg car in 9.0 s if the car is traveling at 90 km/h?
*September 21, 2010 by cindy*

**Physics**

What average force is required to stop an 1600 -kg car in 8.0 s if the car is traveling at 80 km/h?
*October 11, 2010 by Katie*

**physics**

What average force is required to stop an 1900 car in 6.0 if the car is traveling at 80 ?
*April 18, 2011 by colleen*

**Physics**

How large an average force is required to stop a 1400-kg car in 5.0 s if the car’s initial speed is 25 m/s?
*March 12, 2014 by Bola*

**Physics**

In an emergency stop to avoid an accident, a shoulder-strap seatbelt holds a 58 passenger in place. If the car was initially traveling at 94 and came to a stop in 5.2 along a straight, level road, what was the magnitude of the average force applied to the passenger by the ...
*May 25, 2011 by EL*

**physics **

What average force in N is required to stop an 1,188 kg car in 9 s if it is initially traveling at 89 km/h? f=ma f=1,188(9.8) f=11642.4N This looks wrong to me. Can someone explain this to me.
*October 1, 2009 by josh*

**physical science 2**

the force required to maintain an object at a constant velocity in free space is equal to: b: the mass of the object. c: the force required to stop it. d zero
*January 29, 2011 by ellen*

**physics**

A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due to the force of friction. A. What was the acceleration of the car. B. What was the car’s initial momentum? C. What was its final momentum? D. What was the change in momentum of the car? E. What was the ...
*October 23, 2011 by Anonymous*

**physics**

a truck with a mass of 2100 kg travels at a constant speed of 75 km/h. (a) What is the magnitude of the truck’s linear momentum? kg·m/s (b) What average force would be required to stop the truck in 7.5 s? does this have to do with f=ma or not? help
*December 15, 2012 by ricchie*

**physics**

A .22 rifle bullet traveling at 360m/s strikes a block of wood, which penetrates to a depth of .110m. The mass of the bullet is 1.80g. Assume a constant retarding force.A) how much time is required for the bullet to stop? b) what force in newtons soes the wood exert on the ...
*November 16, 2006 by Chris*

**physics**

If an impulse of 60 Ns is required to stop and object, list in your log three force and time combinations that can stop an object.
*January 30, 2011 by kevin*

**Physics**

What is the magnitude of the average force required to stop an 1500kig car in 8.0 s if the care is traveling at 95 km/h? Formula: Sigma F= ma *convert 95km/h to 26m/s Which kinematic equation do I use and for which variable do I use within the equation?
*June 11, 2012 by Mr. McKee*

**Can comeone check my answer for me. Many Thanks! **

A set of data is normally distributed with a mean of 1000 and standard deviation of 100. · What would be the standard score for a score of 1100? · What percentage of scores is between 1000 and 1100? · What would be the percentile rank for a score of 1100? A. z(1100)= (1100-...
*October 22, 2012 by Ashley S*

**physics**

a 2250 kg car is traveling at 20 m/s to the west. the force required to stop the car at 7890 N to the east. How long will it take the car to stop? How far would the car move before stopping?
*February 25, 2014 by Karen*

**Science**

Moving at 20 m/s , a remote controlled car of mass 1000kg hits a pile of sand and comes to rest in 10 s. Find the average force that acted to stop the car. The same car now hits a wall and comes to rest in 1s. Find the average force that acted to stop the car. Use knowledge ...
*August 22, 2006 by Abby*

**Physics**

A cooling fan is turned off when it is running at 920 rev/min. It turns 1100 revolutions before it comes to a stop. What was the fan's angular acceleration? How long did it take the fan to come to a complete stop?
*November 29, 2010 by Angel*

**Physics**

A 2600 kg truck traveling at 72 km/h slams on the brakes and skids to a stop. The frictional force between the truck and the road is 8200 N. Calculate the mechanical work required to stop the truck and the distance the truck travels before stops.
*July 18, 2012 by Jack Hill*

**physics**

I had wrote that was because I was told that in the beginning of the spring being wound the PE=KE. Can I check a concept question, The amount of work required to stop a moving object would be equal to the mass of the object times it intial speed due to mv^2 right. You need to ...
*November 5, 2006 by tatiana*

**math-3rd grade**

Write the +/- family for:500, 1100, 1600. What do i do? 1100+500=1600 500+1100=1600 1600-1100=500 1600-500=1100 Is that correct? Please help.Thank you.
*October 15, 2008 by elaine*

**physics**

In an emergency stop to avoid an accident,a shoulderstrap seat belt holds a 60-kg passenger firmly in place. If the car were initally traveling at 90 km/h and came to a stop in 5.5s along a straight, level road, what was the average force applied to the passenger by the ...
*January 17, 2008 by melissa*

**science**

A car traveling along the highway needs a certain amount of force exerted on it to stop. More stopping force may be required when the car has:
*February 20, 2013 by john*

**physical science**

a car traveling along the highway needs a certain amount of force exerted on it to stop.more stopping force may be required when the car has: ;
*February 4, 2011 by denise*

**physics**

A 30g bullet with a horizontal velocity of 500m/s comes to a stop 12 cm within a solid wall. a) what is the change in its mechanical energy? b) What is the magnitude of the average force from the wall stopping it? a) what would I use of the equation? Can you please explain ...
*January 10, 2007 by Jamie*

**science**

A runner whose mass is 49 kg accelerates from a stop to a speed of 6 m/s in 3 seconds. (A good sprinter can run 100 meters in about 10 seconds, with an average speed of 10 m/s.) (a) What is the average horizontal component of the force that the ground exerts on the runner's ...
*July 17, 2014 by samantha*

**physics**

In a crash test, a truck with mass 2600 kg traveling at 24 m/s smashes head-on into a concrete wall without rebounding. The front end crumples so much that the truck is 0.66 m shorter than before. What is the average speed of the truck during the collision (that is, during the...
*November 21, 2010 by Confused again*

**physics**

In,an,emergency,stop,to,avoid,an,accident,a,shoulderstrap,seat,belt,holds,a,60kg,passenger,firmly,in,place.If,the,car,were,initially,traveling,at,90km/h,andcame,to,a,complete,stop,in5.5s,along,a,straight,level,road,what,was,the,average,force,applied,to,the,passenger,by,the,...
*January 19, 2008 by melissa*

**Physics**

A child is sliding on a sled at 1.8 to the right. You stop the sled by pushing on it for 0.70 in a direction opposite to its motion.If the mass of the child and sled is 36 , what average force do you need to apply to stop the sled?
*March 15, 2011 by Kobe Bryant*

**physics**

Raul pushes a stalled car with a force of 204 N. If the required force decreases at a constant rate from 204 N to 44.0 N for a distance of 16.3 m in 16.0 s, calculate the average power required to move the car. 204-44=160 160*16.3/16 2608/16 answer: 163 W
*April 3, 2008 by Jon*

**math**

if a 1100 lb motorcycle(w/2 passengers)is doing 40mph,how long will take to come to a complete stop?
*March 31, 2012 by dean*

**physics repost**

Raul pushes a stalled car with a force of 204 N. If the required force decreases at a constant rate from 204 N to 44.0 N for a distance of 16.3 m in 16.0 s, calculate the average power required to move the car. 204-44=160 160*16.3/16 2608/16 answer: 163 W
*April 4, 2008 by Jon*

**physics**

A certain sports car accelerates from 0 to 60 mph in 9.0 s (average acceleration = 3.0 m/s2). The mass of the car is 1354 kg. The average backward force due to air drag during acceleration is 280 N. Find the forward force required to give the car this acceleration.
*August 17, 2011 by Anonymous*

**Physics 11**

A 1.2x10^4-kg truck is travelling south at 22m/s. What net force is required to bring the truck to a stop at 330 m? What is the cause of this net force?
*October 23, 2007 by Elita*

**physics**

A 1100 kg car coasts on a horizontal road with a speed of 19 m/s. After crossing a an unpaved, sandy stretch of road 32 m long, its speed decreases to 12 m/s. (a) Was the net force done on the car positive, negative, or zero? Explain (b) Find the magnitude of the average net ...
*April 17, 2013 by phirum*

**physics**

in an emergency stop to avoid an accident, a shoulder-strap seat belt holds a 60kg passengr firmly in place. if the car was initially travelling at 90km/h and came to a stop in 4.5s along a straight, level road, what was the average force applied to the passenger by the seat ...
*March 9, 2009 by alexia*

**physics**

1000 kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is ? n
*November 11, 2012 by Anonymous*

**Physics**

what is the average force needed to stop a car traveling 28m/s in 55m?
*February 19, 2013 by Tory*

**Physics**

what is the average force needed to stop a car traveling 28m/s in 55m?
*February 19, 2013 by Tory*

**Science**

A fixed, single pulley that is used to lift a block does which one of the following? A. doubles the force required to lift the block B. decreases the force required to lift the block C. makes the block easier to lift by changing the direction of the force needed to lift it D. ...
*April 10, 2013 by Cassie*

**physics**

a bullet of mass 0.06kg is fired into a block of wood. if the bullet is moving at 330 m/s as it enters the block and takes 0.15m to stop, find: A) the avg force required to stop the mullet b) the impulse exerted by the wood on the bullet c)change in momentum of bullet
*March 25, 2008 by kin*

**Physics**

Moving at 20 m/s , a remote controlled car of mass 1000kg hits a pile of sand and comes to rest in 10 s. Find the average force that acted to stop the car. The same car now hits a wall and comes to rest in 1s. Find the average force that acted to stop the car. Use knowledge ...
*August 24, 2006 by Abby*

**Physics**

what is the average force needed to stop a car (1000kg) traveling 28m/s in 55m?
*February 19, 2013 by Anonymous *

**Biomechanics**

A pitched ball with a mass of 1 kg reaches a catcher's glove traveling at a velocity of 28 m/s. How much momentum does the ball have? how much impulse is required to stop the ball? If the ball is in contact with the catcher's glove for 0.5 s during the catch, how much average ...
*November 21, 2010 by Walter*

**physics**

a child is sliding on a sled at 1.5m/s to the right. You stop the sled by pushing on it for 0.50 s in a direction opposite to its motion. If the mass of the child and the sled is 35kg. what average force do need to apply to stop the sled. Use the concepts of impulse and motion
*November 18, 2010 by Nina *

**Physics**

1. A bullet of 0.0500 kg is fired into a block of wood. Knowing that the bullet left the gun with a muzzle velocity of 350. m/s, and the bullet penetrates .15 m into the block of wood, determine: a) The average force required to stop the bullet. b) The impulse exerted by the ...
*July 14, 2012 by Help Please*

**physics**

A 72 kg man drops to a concrete patio from a window only 0.60 m above the patio. He neglects to bend his knees on landing, taking 2.0 cm to stop. (a) What is his average acceleration from when his feet first touch the patio to when he stops? m/s2 (b) What is the magnitude of ...
*December 11, 2008 by johnny*

**physics**

A 72 kg man drops to a concrete patio from a window only 0.60 m above the patio. He neglects to bend his knees on landing, taking 2.0 cm to stop. (a) What is his average acceleration from when his feet first touch the patio to when he stops? m/s2 (b) What is the magnitude of ...
*December 11, 2008 by johnny*

**physics**

A 3640 lb roller coaster experiences a constant air-resistance force of 26 lb and a constant friction force of 20 lb. What initial velocity is required for the coaster to make it around the 0.57 mile track and coast to a stop at its starting location?
*November 24, 2010 by sandhu*

**physics**

A 3640 lb roller coaster experiences a constant air-resistance force of 26 lb and a constant friction force of 20 lb. What initial velocity is required for the coaster to make it around the 0.57 mile track and coast to a stop at its starting location?
*November 24, 2010 by sandhya*

**grade 11 physics**

sue drives her 1452 kg car along a straight road at a constant velocity of 30 m/s [E]. Ger brakes suddently give out. she puts the car in neutral and lets it coast for 25 seconds. The air drag decelerates the car to a velocityof 25 m/s [E]. assume a frictionless surface. PART ...
*January 23, 2010 by Laura*

**physics**

A 6 kg box with initial speed 5 m/s slides across the floor and comes to a stop after 1.4 s. a.What is the magnitude of the average net force on the box? b.You put a 3 kg block in the box, so the total mass is now 9 kg, and you launch this heavier box with an initial speed of ...
*June 28, 2014 by sam*

**Physics rollerblading question**

1) Suzie (of mass 38 kg) is roller-blading down the sidewalk going 20 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 2 seconds. What is Suzie’s average acceleration? Answer in units of m/s^2...
*March 25, 2011 by Becca*

**physics**

Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if the passengers experience an average horizontal force of 0.520 their own weight. and How far does the train then travel ...
*February 20, 2008 by katie(again same question diff parts)*

**logic**

we thought the answer was 440. 1320/6=220. Then 1320-220=1100. then 1100/5=220. then subtract 1100-220=880 nd so on...does that make sense?
*October 16, 2008 by gina*

**physic**

Suzie (of mass 58 kg) is roller-blading down the sidewalk going 36 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 2 . 4 seconds. What is Suzie’s average acceleration? Answer in units of m / ...
*November 17, 2013 by jay*

**Math**

The distance require to stop a car varies directly as the square of its speed. If 250 feet are required to stop a car traveling 60 miles per hour, how many feet are required to stop a car traveling 96 miles per hour!
*May 8, 2014 by Angela*

**Physics**

Find the speed at which Superman (mass=88.0 kg) must fly into a train (mass = 17998 kg) traveling at 60.0 km/hr to stop it. Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if...
*March 29, 2011 by Lily*

**Physics**

Find the speed at which Superman (mass=88.0 kg) must fly into a train (mass = 17998 kg) traveling at 60.0 km/hr to stop it. Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if...
*March 27, 2011 by Daniel*

**Physics**

How much time is needed to completely stop a 1600 kg car moving at 35 m/s if an average force of 4200 n is applied?
*January 6, 2011 by Maya*

**Physics**

On vacation, your 1300 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 1.80 m/s2. What is the net force acting on the car? I have determined: 1) the force acting on the car by the trailer is 972 N. 2) The force acting on the trailer by the car is ...
*January 17, 2010 by Bobby C*

**Physics**

On vacation, your 1300 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 1.80 m/s2. What is the net force acting on the car? I have determined: 1) the force acting on the car by the trailer is 972 N. 2) The force acting on the trailer by the car is ...
*January 18, 2010 by Robert C*

**Physics**

A 0.17 kg baseball moving at +20.80 m/s is slowed to a stop by a catcher who exerts a constant force of -376 N. How long does it take this force to stop the ball? How far does the ball travel before stopping?
*October 18, 2012 by Angela*

**physics**

A 0.20 kg baseball moving at +25.20 m/s is slowed to a stop by a catcher who exerts a constant force of -387 N. A)How long does it take this force to stop the ball? B)How far does the ball travel before stopping?
*December 12, 2013 by Najah*

**exp in math**

convert 1100 two to base 10 I came up with 1100 2 = 12 is this correct?
*May 15, 2011 by katie*

**physics **

how much force is required to stop a 100 mi/hr fastball? assume the catcher's mitt stops the ball in 1 millisecond and the mass of a baseball is 145 g
*May 28, 2014 by dick *

**grade 11 physics**

PLEASE HELP - NOBODY ANSWERED MY QUESTION YESTERDAY. sue drives her 1452 kg car along a straight road at a constant velocity of 30 m/s [E]. Ger brakes suddently give out. she puts the car in neutral and lets it coast for 25 seconds. The air drag decelerates the car to a ...
*January 24, 2010 by Laura*

**Chemistry**

At 1100 K, Kp=0.25 for the following reaction. 2SO2(g) + O2(g) (reversible arrows) 2SO3(g) What is the value of K at this temperature? This is what I have so far: I did Kc=0.25(1100(0.0821))^-1 and got Kc=0.00276. That is incorrect. Why? What did I do wrong? I believe I gave ...
*July 31, 2007 by Taasha*

**physics**

a car of mass 3000kg moving at 20m/s is suddenly brought to a stop when a deer crosses the road. if a braking force of 300,000 is needed to bring the car to a stop, what was the duration of the force?
*April 24, 2012 by mark*

**physics**

A MASS OF A MINUBUS WITH THE DRIVER IS 1 500Kg .ASSUME THAT THE PASSENGERS HAV AN AVERAGE MASS OF 50Kg EACH .THE DRIVER IS MOVING AT A SPEED OF 30m.s WHE HE NOTICES THAT THE TRAFFIC LIGHTS AHEAD TURNED TO RED .HE APPLIES A FORCE OF 9 000N ON THE BREAK PEDAL .HOW LONG WILL IT ...
*February 7, 2012 by VICTOR MACMILLAN*

**science**

a car of mass 900 kg moves at 10 m/s. what is the braking force required to stop the car in a time of 5 seconds?
*June 29, 2009 by anonymous*

**science**

a car of mass 900 kg moves at 10 m/s. what is the breaking force required to stop the car in a time of 5 seconds?
*September 17, 2009 by amy*

**Science**

A car of mass 900kg moves at 10 m/s. what is the braking force required to stop the car in a time of 5 seconds?
*March 17, 2011 by shantae*

**Physics**

A cable pulls a crate of mass 19.0 kg across the floor in 6.8s. If the total distance traveled is 5.40 m, find the power used by the cable. (19)*(9.8)*(5.4)/(6.8) ) 147.9 W Raul pushes a stalled car with a force of 204 N. If the required force decreases at a constant rate from...
*May 14, 2009 by Damian*

**Physics**

A 2010 kg car traveling to the west at 18.5 m/s slows down uniformly under a force of 8880 N to the east. a) How much force would be required to cause the same acceleration on a car of mass 3120 kg? How far would the car move before stop- ping? Answer in units of m
*November 13, 2011 by Eileen*

**LAW**

4. Which of the following is NOT considered an administrative search? A. Inspection B. School disciplinary search C. Checkpoint D. Stop and frisk is it D 14. A frisk requires: A. reasonable suspicion that a person is armed and dangerous. B. justification apart from that ...
*December 27, 2013 by Amy*

**physical science**

a car of mass 900 kg move at 10 m/s. What is the braking force required to stop the car in a time of 5 seconds?
*February 11, 2008 by jake*

**Physics**

1580 kg car is traveling with speed of 15 m/s. What is magnitude of horizontal net force that's required to bring the car to a stop in 50 m?
*October 5, 2009 by Jenn*

**physics**

A high jumper, falling at 3.8 m/s, lands on a foam pit and comes to rest compressing the pit 0.38 m. If the pit is able to exert an average force of 1100 N on the high jumper in breaking the fall, what is the jumper's mass?
*January 5, 2012 by Amy*

**physical science explorations**

A car of mass 900 kg moves at 10 m/s. What is the braking force required to stop the car in a time of 5 seconds?
*August 25, 2009 by Peter S.*

**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**

Find the speed at which Superman (mass=89.0 kg) must fly into a train (mass = 19564 kg) traveling at 65.0 km/hr to stop it. The system (train + Superman) must end up with zero momentum. With no external forces, Superman's initial momentum must be equal and oppositely directed ...
*February 20, 2008 by katie*

**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.
*October 17, 2007 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
*October 17, 2007 by Soly*

**physics**

An 85 kg football player traveling 4.7 m/s is stopped in 1.0 s by a tackler. What is the original kinetic energy of the player? (I tried using 1/2 m v^2 but that doesn't seem to be right. How do I manipulate the formula?) What average power is required to stop him?
*June 18, 2012 by brooke*

**physics please help me**

The pole vault landing pad at an Olympic competition contains what is essentially a bag of air that compresses from its "resting" height of 1.1 m down to 0.1 m as the vaulter is slowed to a stop. (a) What is the time interval during which a vaulter who has just cleared a ...
*November 5, 2010 by dan*

**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.
*October 16, 2007 by Soly*

**physics**

need help on this three part one its about inelastic collisions momentum and energy related with work Find the speed at which Superman (mass=76.0 kg) must fly into a train (mass = 17620 kg) traveling at 60.0 km/hr to stop it. Running into the train at that speed would severely...
*February 26, 2008 by kdhgwiu*

**Physics**

Hooke's law states that it takes a force equal to kΔx is required to stretch a sorting a distance Δx beyond its rest length. A) determine a formula in terms of k & Δx that represents the amount of work required to stretch a spring to a distance Δx. Hint: ...
*January 3, 2014 by Sandara*

**Physics**

A 60 kg skier moving at 14 m/s strikes a snow bank and comes to a stop in 4 seconds. What is the average impact force on the skier?
*November 15, 2011 by Shari*

**Physics**

Suppose a 1,600 kg car is traveling at 20.0 m/s. What average force is needed to stop the car in 4.0 s? Can you explain to me how you got your answer, thank you.
*February 16, 2013 by Demere*

**PHYSICS FORCE**

A car moving at a speed of 48.0 km/h accelerates 100.0 m up a steep hill, so that at the top of the hill its sped is 59.0 km/h. if the car's mass is 1100 kg, what is the magnitude of the net force acting on it? i already know you have to change it to m/s but what do you do ...
*October 21, 2009 by lalaglaze*

**Science**

A car weights 1.30 X 10^4 N is initially moving at a speed of 40km/h when the brakes are applied and the car is brought to a stop in 15m. Assuming that the force that srops the car is constant. find a)magnitude of the force b)time required for the change in speed. If the ...
*November 12, 2006 by Ren*

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