# What is the kinetic energy of a 29 kg dog that is running at a speed of 7.9 m/s (about 18 mi/h)?

45,322 questions, page 70
1. ## Physics

A 9.60 g coin is placed 10.7 cm from the center of a turntable. The coin has a coefficient of static friction of 0.80 and a coefficient of kinetic friction of 0.60 with the turntable. The turntable's angular velocity slowly speeds up until the coin starts

asked by Dan on October 17, 2011
2. ## physics

A sled loaded with bricks has a total mass of 23.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 12.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge

asked by lib on October 10, 2012
3. ## Physics

A 6.80 g coin is placed 10.0 cm from the center of a turntable. The coin has a coefficient of static friction of 0.80 and a coefficient of kinetic friction of 0.60 with the turntable. The turntable's angular velocity slowly speeds up until the coin starts

asked by Helpp on October 17, 2011
4. ## need HELP PHYSICS!!

a) Calculate the P.E. a pile driver has if it is raised 4.5 meters by a mechanical winch. If the 510 kilogram pile driver is allowed to fall freely, what would its velocity be at ground level. b) A 4.2 kg mortar shell is fired out of a mortar with a

asked by Anonymous on April 8, 2015
5. ## Chemistry (Follow up post - Dr.BOB22)

Ionization is when an electron is removed from an atom and ionization energy is the energy required to do this. "Electrons stream from the negative electrode to the positive electrode. In the process of moving from one electrode to the other they knock

asked by Jessica on November 13, 2011
6. ## Physics (Algebra Bit)

I still need help on my other question as well... A runner hopes to complete the 10,000 m run in less than 30.0 min. AFter running at constant speed exactly 27.0 min there are still 1100 m to go. The runner must then accelerate at .20 s^-2 m for how many

asked by QUESTION on August 20, 2009
7. ## Chemistry

1) How does the atomic radius change from left to right across a period in the periodic table? A) It tends to decrease*** B)It tends to increase C) It first increases, then decreases D) It first decreases, then increases 2) What is the charge of a cation?

asked by Mary on October 17, 2016
8. ## Chemistry

1) How does the atomic radius change from left to right across a period in the periodic table? A) It tends to decrease*** B)It tends to increase C) It first increases, then decreases D) It first decreases, then increases 2) What is the charge of a cation?

asked by Mary on October 18, 2016
9. ## Language Arts

1. Which of the following is not part of the rising action in "Raymond's Run"? (1 point) A. Squeaky and Raymond confront Mary Louise and her friends on Broadway. B. Mr. Pearson hints to Squeaky that she should consider letting the new girl win. C. Squeaky

asked by Trisha on September 15, 2016
10. ## physics

At the airport, you pull a 18 kg suitcase across the floor with a strap that is at an angle of 41° above the horizontal. Find the normal force and the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of

asked by Jessica on October 18, 2011
11. ## Physics

You drop a ball from a height of 2.0 m and it bounces back to a height of 1.5 m (a) What fraction of its initial energy is lost during the bounce? (b) What is the ball’s speed just at it leaves the ground after the bounce?

asked by Sasha on August 15, 2010
12. ## physics

You drop a ball from a height of 2.0 m and it bounces back to a height of 1.5 m (a) What fraction of its initial energy is lost during the bounce? (b) What is the ball’s speed just at it leaves the ground after the bounce?

asked by jen on August 19, 2010
13. ## physics

A ball of mass m = 0.75 kg is thrown straight upward with an initial speed of 8.9 m/s. Plot the gravitational potential energy of the block from its launch height, y = 0, to the height y = 5.0 m. Let U = 0 correspond to y = 0. Determine the turning point

asked by Bob on February 13, 2011
14. ## Physics

potential energy well for a 2.0 kg particle (the function U(x) has the form bx2 and the vertical axis scale is set by us = 2.0 J). (a) If the particle passes through the equilibrium position with a velocity of 85 cm/s, will it be turned back before it

asked by Akshay on February 1, 2013
15. ## physics

A ball of mass m = 0.75 kg is thrown straight upward with an initial speed of 8.9 m/s. Plot the gravitational potential energy of the block from its launch height, y = 0, to the height y = 5.0 m. Let U = 0 correspond to y = 0. Determine the turning point

asked by Bob on February 13, 2011
16. ## physics

A frictionless pendulum is made with a bob of mass 19.7 kg. The bob is held at height = 0.934 meter above the bottom of its trajectory, and then pushed forward with an initial speed of 2.93 m/s. What amount of mechanical energy does the bob have when it

asked by Anonymous on May 2, 2012
17. ## Chemisty

ok so heres the question: Calculate the energy of a photon of electromagnetic radiation at each of the following frequencies. For 100.7 MHz. the equation to be used is E=Hc/lambda H is planks constant: 6.626*10^ -34. andddd c is the speed of light:

asked by Tee on November 7, 2010
18. ## PHysics!!

Starting from rest at a height equal to the radius of the circular track, a block of mass 25 kg slides down a quarter circular track under the influence of gravity with friction present (of coefficient μ). The radius of the track is 15 m. The acceleration

asked by Bob on May 8, 2012
19. ## MBA Econ

Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimated that in mass production the car would cost \$40,000 per unit to build. The engineers argued that

asked by Nick on May 20, 2009
20. ## Economics

Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimated that in mass production the car would cost \$40,000 per unit to build. The engineers argued that

asked by John on March 17, 2010
21. ## Biology

Fats are excellent energy storage molecules because a) they have a relatively high ratio of energy storing C—H bonds. b)they have a relatively high ratio of energy storing C=O bonds. c)they are hydrophobic and do not easily mix with water. d)they have a

asked by Katy on September 13, 2011
22. ## PHYSICS

An object is attached to an ideal spring. It undergoes a simple harmonic motion with a total energy of E = 2.2 J. The amplitude of the motion is 0.7 m and the maximum speed of the object is 0.5 m/s. Find the spring constant.

asked by Unknown on April 7, 2011
23. ## physics

A simple harmonic oscillator with = 0.845 and total energy = 145 has amplitude 1.45 . A) find spring constant B) find period C) find max speed D) find max acceleration

asked by Aleena on October 18, 2011
24. ## English

1. The man has two dogs. One is a small black and white dog, and the other is a big brown dog. 2. The man has two dogs. One is small black and white, and the other is big brown. (Are the expressions grammatical?) 3. If school finishes early, I will go to

asked by rfvv on July 7, 2011
25. ## Chem

Explain the difference between root mean square (r.m.s.) speed and mean speed.Why is r.m.s. speed a more useful quantity?

asked by Dia B on September 17, 2012
26. ## Database Management

your projects should contain the following: 1. write a prosa text for a domain of your own (maximum 1 A4 sheet of paper) 2. model this text in form of an EER diagram or UML class diagram 3. create a SQL script for building all tables and constraints to

asked by Anonymous on January 30, 2008
27. ## Physics

A package is thrown down a curved ramp as shown in the figure. The package moves from A to B through a quarter-circle with radius R=3.00m. The mass of the package is 25.0kg. The package starts from rest at point A and there is no friction. A) Find the

asked by Anonymous on April 9, 2013
28. ## Maths

Suppose that a boat moves in a straight line with speed v through water with resistance proportional to the square of its speed v with initial speed v0 and initial position x0. Find its speed v(t) and position x(t) and conclude that the boat travels an

asked by James on March 25, 2013
29. ## algebra

A motorist drove for 2 hours at one speed and then for 3 hours at another speed. He covered a distance of 252 km. If he had traveled 4 hours at the first speed and one hour at the second speed, he would have covered 244 km. Find the speeds.

30. ## physics

An object moving with constant acceleration at time t=0 its speed is v. , at t=t. its speed is v./2 , at t=2t. its speed is v./4 . What will be its speed at time t=3t.?

asked by Tillu on July 26, 2011
31. ## AP Physics

Hello given that I person 65 kg takes 4.5 s to climb a flight of stairs that is 5.5 m my question is well I was asked to solve for the work and W=fd and in this case f is equal to the normal force correct? Just take the opposite of mg??????? Also I'm asked

asked by AP Physics on June 16, 2009
32. ## physics

A ballistic pendulum consists of a 1.25-kg block of wood that is hanging from the ceiling in such a way that when a bullet enters it, the block’s change in height can be recorded as it swings. A bullet having a mass of 6.25-grams and unknown velocity

asked by physics8ater on January 9, 2018
33. ## Chemistry

Two rigid containers of equal volume hold hydrogen and argon gases respectively at the same temperature and pressure. Which of the following statements is(are) false ? A) The two containers hold an equal mass of gas. B) The two containers hold an equal

asked by Gina on February 18, 2011
34. ## Physics

A white billiard ball with mass mw = 1.43 kg is moving directly to the right with a speed of v = 3.4 m/s and collides elastically with a black billiard ball with the same mass mb = 1.43 kg that is initially at rest. The two collide elastically and the

35. ## physics - Damon

PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined

asked by Sarah on January 30, 2010
36. ## math

A motorist travelling at a steady speed of 120km/h covers a section of the highway in 30min. After a speed limit is imposed he finds that when travelling at the maximum speed allowed he takes 20 min. longer than before to cover the same section. Calculate

asked by Lindsay on November 30, 2012

A 80- kg child sits in a swing suspended with 2.6- m-long ropes. The swing is held aside so that the ropes make an angle of 46 o with the vertical. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is

asked by Anonymous on March 21, 2012

A 80- kg child sits in a swing suspended with 2.6- m-long ropes. The swing is held aside so that the ropes make an angle of 46 o with the vertical. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is

asked by Holly on March 21, 2012
39. ## Science

a body of mass 5 kg is thrown vertically upwards with a speed of 10m/s what is its k.e. when it is thrown find its potential energy when it reaches at highest poiint also find maximum height attained by the body?

asked by Sharma on February 25, 2012
40. ## Physics

A 50- kg child sits in a swing suspended with 3.8- m-long ropes. The swing is held aside so that the ropes make an angle of 48 o with the vertical. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is

asked by Hunter on October 9, 2013

The angular speed of a large pulley wheel that has a radius of 15, is 50 revolutions/min. Find the angular speed and the rim speed of the smaller wheel that has a radius of 5. The rim speed is going to be the same. I got the angular speed but I can't

asked by Jessica on April 5, 2011
42. ## Physics

an automobile tire has a radius of 0.350M, and its center forward with a liner speed of v=13.0m/s. (a) Determine the angular speed of the wheel. (Assume that there is no slipping of the surfaces in contact during the rolling motion.) (b) Relative to the

asked by CJ on March 14, 2007
43. ## physics

The figure shows an overhead view of a 3.00-kg plastic rod of length 1.20 m on a table. One end of the rod is attached to the table, and the rod is free to pivot about this point without friction. A disk of mass 37.0 g slides toward the opposite end of the

asked by Amy on November 16, 2016
44. ## math

amy paid 64.13 for a pair of running shoes during a 35% sale off. what was the regular price.

asked by scooby9132002 on July 1, 2009
45. ## computer

My laptop comes on but the screen is blank. The lights are lighting and the fan is running.what could be the problem?

asked by alina on June 20, 2013
46. ## Math

Amy paid 72.34 for a pair of running shoes during a 20%- off sale. What was the regular price?

asked by Chloe on January 27, 2010
47. ## algebra

amy paid \$67.65 for a pair of running shoes during a 30% of sale. what was the regular price?

asked by scooby on November 4, 2009
48. ## biomechanics

An individual is running around a turn with an 11-m radius at 3.75 m/s. What is the runner's centripetal (radial) acceleration?

asked by tina on November 4, 2009
49. ## algebra

Amy paid \$87.27 for a pair of running shoes during a 15%-off sale. What was the regular price?

asked by Valentine on February 19, 2011
50. ## algebra

Amy paid \$91.55 for a pair of running shoes during a 15% off sale. What was the regular price?

asked by Terri on January 26, 2010
51. ## Math

Amy paid \$66.66 for a pair of running shoes during a 35%-off sale. What was the regular price?

asked by Anonymous on August 3, 2008
52. ## algebra

amy paid 78.42 for a pair of running shoes during a 25% off sale what was the regular price?

asked by mike on September 6, 2011
53. ## algebra

amy paid \$65.53 for a pair of running shoes during a 25% off sale. what was the regular price?

asked by axia on August 7, 2009
54. ## Algebra

Amy paid \$67.15 for a pair of running shoes during a 15% off sale. What was the regular price?

asked by T on June 10, 2010
55. ## physics2

6)Adam is running at an average velocity of 6 Km/h. How many meters would Omar run after 15 minutes?

asked by faisal on December 14, 2010
56. ## science

Fan can accelerate from the starting blocks to running 11 m/s down the track in 5 seconds. What is her acceleration?

asked by cj on June 30, 2015
57. ## math

Michael will be running 15 mile road race this weekend. How many feet will he run?

58. ## math

Amy paid \$78.33 for a pair of running shoes during a 30% off sale. What was the regular price?

asked by rere on October 16, 2008
59. ## math-word problem

Amy paid \$53.74 for a pair of running shoesduring a 15% off sale. what was the regular price?

asked by KiKi on March 28, 2010
60. ## Social Studies

An______ makes a living by planning, building, and running machines and sructures

asked by Clayton on May 4, 2009
61. ## Math

Amy paid 72.34 for a pair of running shoes during a 20%off sale. what was the regular price?

asked by Lee on January 31, 2010
62. ## Algebra

Amy paid \$71.85 for a pair of running shoes during a 20% off sale. What was the regular price?

asked by A.W. on March 22, 2009
63. ## algebra

amy paid 55.42 for a pair of running shoes during a 15%-off sale. What was the regular price?

asked by chica on January 26, 2010
64. ## English

To get in shape for a marathon, Shelby started running around the block a few times each morning.

asked by Teresa on February 27, 2019
65. ## physics

A giant bull running at 15 m/s slows at a rate of 2.4 meters per second per second. How long does it take it to stop?

asked by ana on September 22, 2015
66. ## Physics

What distance does Anna covered by running on a circular track of length 500m?

asked by Edgar on July 27, 2015
67. ## science

You are running from a zombie with a velocity of 2.5 m / s. If you run for 1500 meters and have a mass of 61.4 kg, how much work have you done?

asked by connie on October 19, 2014
68. ## english

On the moors the hare is running races in her mirth whats the figure of speech and where is it

asked by Anonymous on June 11, 2012
69. ## Physics

A 8.70-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.400. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, N (b)

asked by NHS on September 17, 2007
70. ## physics

A 4.85-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.440. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by andy on September 18, 2012
71. ## physics

A 3.50-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.330. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by nyasha on October 14, 2009
72. ## Physics (46)

A 4.67-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.446. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by Tiffany on February 7, 2011
73. ## physics

A 9.90-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.372. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by kidd on June 30, 2013
74. ## Physics

A 2.20-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.480. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by Lisa on September 8, 2008
75. ## physics

A 9.90-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.372. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by gina on July 12, 2013
76. ## physics homework 1

A 4.67-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.446. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by Nerdy Nancy on February 8, 2011
77. ## Physics

A 4.51-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.382. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by Randy on February 13, 2013
78. ## physics

A 6.01-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.291. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

asked by Sam on October 3, 2012
79. ## economics

engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. they estimated that in mass production the car would cost 40000 per unit to build. the engineers argued that

asked by Razu on August 10, 2010
80. ## managerial economics

Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimate that in mass production the car would cost \$40,000 per unit to build. The engineers argued that

asked by jean on February 7, 2008
81. ## Physics

From the expression E = mgh for potential energy, how can I express the unit of energy, the joule, in terms of kilograms, metres and seconds? could anyone explain to me what this question is asking me for cuz I don't understand it, to be honest? thanks

82. ## Chemistry

Calculate the maximum wavelength of light capable of removing an electron for a hydrogen atom from the energy state of n=4 if it requires an energy of at least 1.36 x10^-19 J to do this. I just want to know how to find the second n value so i can solve

asked by Maxx on February 22, 2016
83. ## Chemistry

A minimum energy of 151 kJ is required to dissociate a mole of iodine molecules, I2. Calculate the wavelength of radiation that supplies this energy, assuming each bond beaks by absorbing one photon.

asked by Victor on November 28, 2016
84. ## Physics

Say what energy changes are taking place: a)clockwork toy b)boy kicking soccer ball c)boiling kettle on a gas ring d)person walking upstairs What are the wasted energy in a) b) c) and d)?

asked by Amir on February 19, 2010
85. ## Science

QUESTION: "Make a hypothesis about how space craft that travel through the solar system obtain the energy they need to operate." We are studying energy forms in class (Kenetic, Potential, Nuclear, etc.)... i need help NOW!

asked by Diamond on October 25, 2007
86. ## Biology

What component is present in every part of a loop, such as one that involves proteins producing energetic molecules from sugar? 1 - Raw Materials 2 - Energy release 3 - Energy absorption 4 - Information (*) my answer

asked by Sarah on March 11, 2008
87. ## physics

A set of crash tests consists of running a test car moving at a speed of 11.6 m/s (25.5 m/h) into a solid wall. Strapped securely in an advanced seat belt system, a 61.0 kg (134.2 lbs) dummy is found to move a distance of 0.750 m from the moment the car

asked by jamie on December 4, 2010
88. ## physics

You drop a ball from a height of 1.9m , and it bounces back to a height of 1.3m . a)What fraction of its initial energy is lost during the bounce? b)What is the ball's speed just before the bounce?

asked by Andrew on October 11, 2012
89. ## Physics

A 10 g bullet is fired into a 5 kg wooden block initially at rest on the floor. The bullet lodges in the block and the block slides 10 cm across the floor before coming to rest. If the coefficient of kinetic friction between the block and the floor is 0.5

asked by Anonymous on June 23, 2013
90. ## Physics

Consider an archery bow as behaving like a spring with a spring constant of 493 N/m. If an archer pulls the bowstring back for a distance of 42 cm, what is the elastic potential energy of the "loaded" bow? If the mass of the arrow is 39 grams, what is its

asked by Kevin on May 3, 2016
91. ## Physics

Consider an archery bow as behaving like a spring with a spring constant of 493 N/m. If an archer pulls the bowstring back for a distance of 42 cm, what is the elastic potential energy of the "loaded" bow? If the mass of the arrow is 39 grams, what is its

asked by Kevin on May 3, 2016
92. ## Physics Work and Energy

A 55 kg trampoline artist jumps vertically upward from the top of a platform with a speed of 5.5 m/s. (Ignore small changes in gravitational potential energy.) (a) How fast is he going as he lands on the trampoline, 3.0 m below? (b) If the trampoline

asked by DJ on November 23, 2009
93. ## Physics

A 2.90 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 2.23 m in 1.90 s. a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between the block and

asked by Diana on October 19, 2010
94. ## Physics

A 2.90 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 2.23 m in 1.90 s. (a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between the block and

asked by Diana on October 20, 2010
95. ## physics

A 3.00 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 1.94 m in 1.70 s. (a) Find the magnitude of the acceleration of the block. (b) Find the coefficient of kinetic friction between the block and

asked by justin on March 10, 2011
96. ## Physics

A 2.84 kg block starts from rest at the top of a 30° incline and accelerates uniformly down the incline, moving 1.92 m in 1.90 s. (a) Find the magnitude of the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block

asked by Anonymous on December 8, 2014
97. ## math

a cyclist rides for 5 hours at a certain speed and then for 4 hours at a speed 6 km/h greater than her original speed. If he rides 294 km altogether, what was her initial speed?

asked by John on February 18, 2017
98. ## SCIENCE

CAN SOMEONE PLEASE HELP ME AND TELL ME IF IM RIGHT even a guess would be good ive been trying 4 a answer since 6:00 PLEASE help me :/ i think that the 2nd one is correct because i no that energy is not lost when water is boiled it is gained because of the

asked by bobbi on April 28, 2009
99. ## science

I know that every element has only a certain set of allowed energy states & that the exact energy of these states depends upon the number of electrons, but why is the colour of the light emitted by an element (in GASEOUS STATE) characteristic of the

asked by duncan on February 7, 2007
100. ## Physics

A 80 kg skier grips a moving rope that is powered by an engine and is pulled at constant speed to the top of a 25 degree hill. The skier is pulled a distance x = 230m along the incline and it takes 2.3 min to reach the top of the hill. If the coefficient

asked by Kensey on June 18, 2012