# 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 apply the same kinetic energy to stop.

THe work done on a brake in stopping (force*distance) will be equal to the change in KE.

The homework question asks: which work woulf be required to stop a moving object: the intial speed, the intial kinetic energy of the object, the mass of the object times it acceleration, the mass of the object times its intials speed, or the square of the intial speed of the object.

Since you said its based on change in KE, The work required to stop the car would be intial KE

1. 👍 0
2. 👎 0
3. 👁 206

## Similar Questions

1. ### pysics

A 900 kg car rolling on a horizontal surface has speed v = 60 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.2 m. What is the spring stiffness constant of the spring? I solved this and i

asked by TC on October 12, 2009
2. ### English

1. (Who, Whom) wrote this poem about Knoxville, Tennessee? 2. Has anyone told told Maya or (she, her) about the opera? 3 .The coach was happy with (we, us) runners. 4. (Who, whom) should I thank for the tickets? 5. Mr. Yu helped

asked by Hayley on February 28, 2011
3. ### English

1. (Who, Whom) wrote this poem about Knoxville, Tennessee? 2. Has anyone told told Maya or (she, her) about the opera? 3 .The coach was happy with (we, us) runners. 4. (Who, whom) should I thank for the tickets? 5. Mr. Yu helped

asked by Hayley on February 28, 2011
4. ### thermodynamic

The air 10 cm diameter cylinder, as shown below, is heated until the spring is compressed 50mm. Find the work done by the air on the frictionless piston. The spring as the beginning of this process has a displacement of 0.0m with

asked by chris on January 9, 2011
5. ### thermodynamic

The air 10 cm diameter cylinder, as shown below, is heated until the spring is compressed 50mm. Find the work done by the air on the frictionless piston. The spring as the beginning of this process has a displacement of 0.0m with

asked by chris on January 9, 2011

A spring with an unstrained length of 0.076 m and a spring constant of 2.6 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a

7. ### Poem

I wrote this poem and I was asking if it sounded good. Also it's a true poem dedicated to my deceased Grandfather. Remember when Remember when you told me That you'll always be by my side Remember when you told me Brave girls

asked by Baby Phat on February 3, 2009
8. ### ela

can you proof read for me He went back to room and he saw his father didn't woke up. He wrote this stuff and went to sleep again. Eddie gave them a Chinese banquet at the hotel to them in China. They ate Chinese food. After eating

asked by anu on January 11, 2010
9. ### science

1.A scientific law A)can have only one known exception B)can have any number of exceptions as long as we know about them C)might have many exceptions we donâ€™t know about D)has no exceptions*** 2.Sunspots are A) solar storms that

asked by katrina on November 30, 2016
10. ### Physics-bobpursley can u check this again please

Q. A 10.6 kg weather rocket generates a thrust of 226.0 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 402.0 N/m, is anchored to the ground.

asked by Lyn on October 28, 2010
11. ### English

I'm posting you a paragraph I wrote containing phrasal verbs. This is more urgent than the previous one. Thank you. 1) My friend looked very upset so I thought she needed to brighten up. I invited her to the cinema and she

asked by Henry2 on October 9, 2011

More Similar Questions