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# What Is The Difference Between Conservation Laws, Law Of Conservation Of Linear Momentum (Coursework Sample)

Instructions:

Instructions: When math is necessary, show all work and calculations to avoid deductions. In all other questions, state your response clearly and detailed.

1.  (10 points). What is the difference between Conservation Laws, Law of Conservation of Linear Momentum, and the Conservation of Energy?

2.  (10 points). A ball’s mass is 1.50 kilograms, and it leaves the racket with a horizontal speed of, say, 90 mph. Find the average force on the tennis ball as it is served.

3.  (15 points). (a) What is the difference between Work, Energy and Impulse? Give the mathematical equation for all three labeling the different parts. (b) Explain the difference between Kinetic, Potential and Mechanical Energy.

4.  (15 points). (a) A 1000 kg car accelerates from 0 to 27 m/s. Find the car’s kinetic energy when it travels 27 m/s. (b) Now consider a 5-kg brick lifted to a height of 1.0 meter above a table. Find the potential energy to the table top. (c) Then, consider the same brick now dropping to the floor which has a height of 2.0 meters. Find the new potential energy relative to the floor. Compare your answers in part (b) to part (c)

5.  (10 points). Tell me Newton’s three Laws of Motion. Be Specific.

6.  (10 points). Explain the concept of a Collision. What is the difference between Elastic and Inelastic collisions?

7.  (10 points). What is the difference between Weight, Mass, Inertia, and Friction?

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Content:

Instructions: When math is necessary, show all work and calculations to avoid deductions. In all other questions, state your response clearly and detailed.
Name
Instructor
Course
Date
(10 points). What is the difference between Conservation Laws, Law of Conservation of Linear Momentum, and the Conservation of Energy?
The conservation laws state that the total magnitude of a system’s physical property energy, momentum or charge remains unchanged even when then there are changes of such property between the system components. The Conservation laws are the Law of Conservation linear momentum, Law Conservation of energy, Laws Conservation angular momentum and the Law of Conservation of charge. The Law of Conservation of Linear Momentum, states that when the resultant external force acting on a system of several bodies is zero as the linear momentum of the system is constant, while the Conservation of Energy states energy is not created or destroyed, but rather transformed from one form to another and the total energy in the universe. Remains constant as it is conserved.
(10 points). A ball’s mass is 1.50 kilograms, and it leaves the racket with a horizontal speed of, say, 90 mph. Find the average force on the tennis ball as it is served.
According to Newton’s second law F= m*a
Acceleration = (Vf-Vo)/ t
In this case the speed at 90 mph= 40m/s and f= 1.5kg*(40m/s-0m/s)/1s= 60
Alternatively
Momentum=1.5kg*40m/s=60 kg m/s
Assuming that the average contact time is 1 second then f= О” mv/ О” t=60kg m/s/ 1s= 60 N
(15 points). (a) What is the difference between Work, Energy and Impulse? Give the mathematical equation for all three labeling the different parts. (b) Explain the difference between Kinetic, Potential and Mechanical Energy.
Work refers to the force applied to an object resulting in movement and when there is movement in the direction of the force. On the other hand, energy refers to the capacity to do work, and has the same SI unit joule while energy can exist in different forms including kinetic, mechanical and potential energy. The impulse is a vector quantity represented as the net force multiplied by the time to exert the force
Work done= force* distance moved in direction of force( displacement)
Force e (f) = mass (m) * acceleration (a), f=ma
Impulse (I) = Ft= mat
Kinetic energy is the energy of motion, which depends on the velocity and mass, while potential energy is the stored energy that objects have because of their condition or position, and objects held in a position where they can fall have gravitational potential ...
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