PHY 231 Recitation for August 10, 2021 Beatrice stands beside the tracks as a train rolls past. She notes that the frequency of the train whistle is 465 Hz when approaching and 441 Hz when receding. How fast was the train moving?

Q: The type of energy associated with motion is energy.

A: Solution: There are two types of mechanical energy. 1. kinetic energy 2. potential energy

Q: Your mother got mad at you because you fall down her favorite plate at a height of 4 feet with a…

A: Kinetic energy = 1698.9 joule

Q: How much is work is done by you when you lift a 10 kg object half meter off of the ground?

A: Mass of the object, m = 10 kg Height above the ground, h = 0.5 m Acceleration due to gravity, g =…

Q: How many joules of gravitational potential energy does 1 kg book gan when it s elevated 4m

A:

Q: What is the energy in the motion of a ball with a mass of 4 kg going at 11.4 m/s?  Give you answer…

A:

Q: When do we say that work is dine on an object?

A: Usually their are two types of work which are classified for a system. They are work done on  the…

Q: what is a perpetual bike?

A: The word perpetual means never ending or changing , it also means continuously repeating. The…

Q: How fast must a 4.40 kg bowling ball move in order to have a kinetic energy of 185 Joules

A:

Q: A bird of (1.6 kg) flies with (5 m/s), calculate its energy.

A: Given, mass of the bird, m = 1.6 kg speed of the bird, v = 5 m/s

Q: The two ways we can move energy around are called and

A: there are two ways we can move energy around- 1) Electrically- by electrically process energy move…

Q: Why is it that the work done in holding a bag w above the floor is 0?

A: GivenF=1 N1 m above the floor

Q: What is the relation between work and energy?

A: Work: If a force is applied to a body and the body displaced  by a distance then the product of the…

Q: What is the difference between work and energy?

A: Introduction: Work is the transferring of some amount of energy with the help of force.

Q: A 59 kg person climbs up the stairs with a height of 5.5m. Where does the energy come from to cause…

A: Energy come from to cause this increase as potential energy Potential energy increase in this case…

Q: If a can was shot 10m away of the standing point and the sensor inside it registered 100 Joules of…

A: The given values are, E=100 Jd=10 m

Q: An object of mass 6.0 kg has 180 joules of kinetic energy. To the nearest 0.1 m/s, how fast is this…

A: Given: In this question, the given details are, An object of mass 6 kg has 180 J of kinetic energy.…

Q: If you have an object with a mass of 45.54 grams, and it is moving at a speed of 3.5 m/s, what is…

A:

Q: If a ball has 0.5 J of kinetic energy, what will be its new kinetic energy if you double the mass…

A: Given: Kinetic energy of a ball is 0.5 J To find: New kinetic energy when mass of ball is double and…

Q: A horse is pulling a sled with 20O N of horizontal force against an average of 100 N of friction for…

A: Given: The applied force by the horse is 200 N. The frictional force is 100 N. The displacement of…

Q: Calculate the mass of a car that drives at 21m/s and has 20000 J of energy ?

A: Given value--- speed = 21 m/s. energy = 20000 J. We have to find--- mass ?

Q: A Honda Civic does 778,825 Joules of work to accelerate from 0 to 60 mph in 5.8 seconds.  How much…

A: Given data: The work done is W=778825 J The time is t=5.8 s

Q: Name six different forms of energy?

A: Six different forms of energy are:

Q: An object of mass 8 kg moving at a speed of 7 m/s collides with a ball of mass 9 kg moving in the…

A: Given: The intial speed of the 8 kg ball is 7 m/s. The initial speed of the 9 kg ball is 4 m/s in…

Q: How are Newton's laws and the law of conservation of energy very important?

A: Newtons laws of motion are foundation of classical mechanics. Newton's laws of motion used to solve…

Q: How much work is done lifting a 120-pound chair from the ground to the top of a 40-foot building…

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Q: A shot putter heaves a 8 kg shot with a velocity of 7.5 m/s. What is the form of energy? Calculate…

A: Given  Mass of shot putter  m = 8 kg Velocity of shot putter v = 7.5 m/s To find  The Form of energy…

Q: When you wind up a spring in a toy or stretch a rubber band, what happens in terms of work, energy,…

A: Energy can neither be created nor be destroyed but it can be converted from one form of energy to…

Q: Calculate the mass of a car that drives at 14 m/s and has 20000 J of energy .

A: Given data :                         Velocity     =     V                 Kinetic energy    =   K•E…

Q: Calculate the mass of a car that drives at 12 m/s and has 2100 J of energy.

A: Introduction :   In this question we are provided with value of kinetic energy and velocity . with…