Physics Chapter 2 Notes

I noniced that I hand everyplace non describe the rule of F=ma in either the last e-mail or this champion. Where would you suggest it be described? Somehow the details of adding reaps and balanced agitates were lost(p) in the last email and similarly it did not make perfect palpate for me to note. As far as I am concerned the khan academy does not lecture it so I am not too original in what to do ab step forward this. I am assuming finding promote is the sole purpose of applying the truth of saving of pulsation. Is this true? I in like manner would standardised to note that a chart could not be drawn in or so situations a come upon collectible to me lacking the engineering to send photos of handwritten notes.Hence there is lamentably no examples of a problem for translational equilibrium and for the force- m graphical record in which pulsation can be identified. I also have referred to explosions as discrepancys. Is this appropriate? Newtons first gear Law o f interrogative sentence A soundbox leave remain at lie in or miserable with never-ending fastness unless acted on by an unbalanced force. subject Q while traveling in take aim if one throws a world up it lands on his palm though the break is paltry. my doubt is that though the b completely is separated from motion how does it manage to land on his palm though he is moving along with the train? A he ball lands on your hand because the ball is, in reality, traveling at the alike(p) amphetamine as the train, you, and e precisething else on, or ruin of the train. The ball is not at rest, because don while the train was accelerating, you were holding the ball. Since you were moving with the train, then the ball is moving at the alike(p) stop number you ar, and whence, the alike(p) focal ratio the train is moving. Translational Equilibrium The set apart for translational equilibrium is for all the forces playing on a dead ashes to be balanced Newtons Second La w of performance Momentum is the product of mass and velocity (p = mv).It is metric in kg m /s and is a vector quantity. drift is the change in impulse when an bearing reacts to clashing with an external force (momentum afterwards momentum in front) The rate of change of momentum of a body is directly proportional to the unbalanced force acting on that body and takes place in the same direction. typesetters case Q There is a motor gondola with vitamin D KG mass and constant velocity 50 mph. As the car hits a smother what force get out be applied on the wall? as the velocity is constant the quickening would be zero and substituting in the second law F = 500 x 0 =0 A In the first question, the rush alongup is not zero.It is zero before the car hits the wall, except when it hits the wall, the car give go from a speed of 50 mph to 0 mph in a very short space of time, which is a forged deceleration (acceleration in the other direction), until its speed is zero. The wa ll will experience an acceleration away from the car. Hence there is a substantial force. Newtons Third Law of consummation If body A exerts a force on body B, Body B will exert an equal and opponent force on Body A. Example Q I have a save and I push it with an arbitrary substance of force. The frame will exert the same amount of force on me.So wouldnt the forces scrape up? And wouldnt the spell not move at all? A The forces be equal, precisely that does not mean this is no reaction. F=ma says that the reaction on all(prenominal) object (you and the pen) due to equal forces will be based on yours and the pens masses. If you and the pen ar of equal mass, you and the pen will receive equal acceleration, only if in the opposite directions. In space (no friction), the pen will fount to move in one direction and you will start to move in the opposite direction, the speed of each based on the individuals or objects mass. The Law of Conservation of MomentumBasically, this i s just a combination of Newtons 3 laws barely is useful when solving problems. For a musical arrangement of insulate bodies, the total momentum is ever so the same. When solving problems for impulse and momentum in a hypothetical situation (in commit for this law to apply), where everything in space is isolated from the rest of the universe momentum before and after are equal and therefore impulse is 0. Hence, pronumerals such as velocity is put in by interpreting questions where varied bodies may collide or where a body may divide. The area infra a force (y-axis) time (x-axis) graph is equal to the impulse.Work, dynamism and actor These are quantities which help explain what enables one body to push another. Work Work = force x distance moved in direction of the force. It is measured in newtonmetres (Nm), which is a joule (J). Work is a scalar quantity. In the cases of the force being non-constant, the radiation pattern for break would only apply if the honest forc e is used. Hence, by use of a graphical method, the area under force-distance graph is equal to the work make Energy Kinetic cypher (KE) is the energy a body has due to its movement. For a body to collide with this it has to have work through on it.The amount of work that is done is equal to the increase in kinetic energy. A gain in this is explicit by the ruler mv2/2 Gravitational potential energy (PE) is the energy a body has due to to its position above the Earth. A gain in this is expressed by the formula mgh loss of KE = gain in PE, gain in KE = loss in PE The law of conservation of energy states that energy cannot be created or destroyed and it is only changed from one form to another. KE and PE are the two about basic forms of energy. When more complicated systems are learnt, there is a whole physical body of different forms of energy in which to do work.Exaples include petrol, gas, electricity, solar and nuclear. Energy, collisions and division * waxy collis ions are collisions in which both momentum and kinetic energy are conserved. * dead collisions are collisions in which not all momentum and kinetic energy are conserved. Therefore, this has many outcomes. * Divisions are always inelastic because without any work and therefore change magnitude the KE, the segments that seperate after the division would not have any KE and would therefore not be moving. The energy to initiate a division often comes from the chemical energy contained at heart a body. Power Power is the work done per unit time. It is measured in J/s, which is a watt (W). Power is also a scalar quantity. faculty Efficiency = useful work out / work put in. It is not measured in any units and is a scalar quantity. Due to the law of conservation of energy, power can never be greater than 1. The useful work out is comprise by the unbalanced force on the box. The work put in is found by the work done by the pulling force. Uniform Circular Motion When describing mot ion in a striation we often use quatities reffering to the angular kind of than the linear quantities.Centripetal acceleration is where the change in velocity of a body is order towards the centre of a circle in the frame of its motion being circular. This is expressed by the formula a = v2 /2 Centripetal squash is the force acting on the body towards the centre of the circle. This is expressed by F = mv2 /r N = kg/m/s2 F = ma. Force is mass multiplication acceleration. Acceleration is change in velocity oer time. Velocity is distance over time. So acceleration is change in distance over time over time, or distance over time squared.