Essay on Homework #3 Solutions

The ball now has kinetic energy. Kinetic energy like momentum in that it comes from the mass of the object and its velocity. Kinetic energy was transferred from the plunger to the ball just like momentum was but only if the collision was elastic. During and elastic collision kinetic energy is conserved. The balls kinetic energy is half of its momentum squared. This means the balls momentum is its mass multiplied by velocity, and then it is squared and divided by two. If the velocity or speed of the ball is reduced by one half then the overall kinetic energy is reduced by a factor of four (Kirkpatrick and Wheeler p.106)

9. The total energy is constant for most of the time until the ball is released and caught up and down in free fall, because extra force of the person actions changes the energy. The energy should remain constant because the kinetic and potential ratio energy

5. Tie one end of the 60-cm string to the mass. Place the mass on a table below

15) A cart starts from rest and accelerates at 4.0 m/s2 for 5.0 s, then maintain that velocity for 10 s, and then decelerates at the rate of 2.0 m/s2 for 4.0 s. What is the final speed of the car?

An unknown force pushes a 17 kilogram block across a smooth (frictionless) floor. Three seconds

General Instructions: • Write your name and student ID clearly above. • You have 1 hour and 15 minutes to write the exam. No extra time will be given. • There are 4 questions in the exam, all with subparts. The questions combine for a maximum of 100 points. • You must write your answers clearly in the space provided for each question. You might use the backside of each page, as well as any additional sheets as required. If you are using additional space, you must clearly label the question no. that you are answering. Any loose sheets must have your name and student ID written clearly. • The exam is open book/open notes, however,

A car in a roller coaster moves along a track that consists of a sequence of ups and downs. Let the x

Problem Set 2 is to be completed by 11:59 p.m. (ET) on Monday of Module/Week 4.

Solutions to Homework Assignments: Chapter 4 6. Are all capital gains (gains on the sale or disposition of capital assets) taxed at the same rate? Explain. No. If a taxpayer holds a capital asset for a year or less the gain is taxed at ordinary tax rates. If the taxpayer holds the asset for more than a year before selling, the gain is generally taxed at a maximum 15% rate but could be taxed as high as 20% for high income taxpayers. If the taxpayer sells more than one capital asset during the year and recognizes both capital gains and capital losses, the gains and losses are netted together before determining the applicable tax rate.

After doing this problem, I found that I am very comfortable using the kinematic equation of vf = v​i​​+at, when I use this equation I find that I always get the right answer for the problem, which is great, and I have no further questions to help me understand this

So, the horizontal distance travelled by the electron when it hits the plate is 0.096 m.

The energy absorbed by the fabric in the armor is equal to the loss of kinetic energy carried by the bullet during impact.

The collision that conserved the least amount of energy was the explosion. Though you could not calculate the percent error because the initial velocity was zero, but you can blatantly tell that this collision did not conserve energy at all. The energy switched from Ee to Ek, and the actual spring acts as an outside force. Therefore, the energy to start with during the explosion collision is totally different than what it ends with. With reference to energy and momentum conservation, we can see that throughout this whole experiment that one-hundred percent energy and momentum conservation was not possible, the magnetic head-on collision came as close as we can to conservation. Thus, this experiment results as the collisions being inelastic, but the most elastic collision was the magnetic head on collision because energy and momentum were conserved the best through this

three boundary contions we know right away; the initial time at time zero and initial height or 7’1” along with the final

Because the Energy of the BB is conserved in the system after the collision, I wanted to show that. So I used the formula .5*(mass of the BB + pendulum)*(velocity of the BB + pendulum) ² to find the Kinetic Energy. After that I calculated the Potential Energy using (mass of the BB + pendulum)*gravity*height by which the pendulum swung. To calculate the Velocity of the BB combined with the pendulum I derived the equation: velocity = √2*gravity*height swung by which the pendulum swung. I will use the average height swung by the pendulum for both mass BBs.