03 Oct PHY-102: Energy and Circular Motion Exercises Co
PHY-102: Energy and Circular Motion Exercises Complete the following exercises. There is gases powder release by rifle which create increasingly pressure inside that outside in the reaction area. More gasses are released by burning powder over time which lead to higher pressure. The total force applied to the bullet inside to accelerate depends on inch of barrel such that the bullet will have lager velocity for long barrel than shorter due to higher pressure due to higher gasses expansion. The work-energy explains this using change of kinetic energy. The distance and work are the function (work = force *distance). The expanding gasses tends to exert forces in rifle over some distance based on work done. When there is more work done on K.E, the more the speed of bullet. As such, the long barrel provides more space for work done than shorter barrel thus larger velocity/speed when fired. Crumple are located in the back or front areas of cars with special design structures to reduce injuries in the crash incident. Based on Newton First Law of motion, a body tends to move with certain speed until external forces stops it. Crumples are designed to reduce the impact of passenger’s injuries by distributing the crush force and increasing the crush time. The second law of Newton indicate that the force depends on time, mass, and acceleration when the vehicle will come to a state of rest. Crumples are designed with some soft materials that distribute effects of crash and increasing time. According to law of conversation of momentum, system remains in a constant state with a closed total momentum. The fired bullet from a gun will tend to move backward due to effect of the recoil. The recoil state tends to occur when there is law of conversation of momentum when bullet and gun were at state of rest before the firing. This means that the total momentum is zero. The momentum will increase after firing the gun and the decrease to create the effect of recoiling for the gun. There is a revere forces based on mass of projectile in the wake of shooting. The discharging mass in the lines indicate law of force preservation. D, B, C, AA, B, D, CB, D, A, CCombined Speed after collision = Vf = 2.5 m/s Junior’s Speed before collision Vij= 8m/s Combined speed after collision = Vf = ? Ben’s mass Mb = 55 Kg Ben’s speed before collision = Vib = 0m/sAccording to the law of conservation of linear momentum, ” The total momentum of an isolated system remains constant.” The energy neither enter or leave the system according to isolation of mass.As such, Before collision,Total momentum = Pi= Mb Vib + Mj VijAfter Collision, Total Momentum = Pf = Vf ( Mb + Mj)There is equal total momentum before and after collision based on law of conservation of momentum. Pi = Pf Mb Vib + Mj Vij = Vf ( Mb + Mj) Arranging for Vf Vf =( Mb Vib + Mj Vij) / ( Mb + Mj) Vf =[ (55Kg)(0m/s) + (25Kg)(8m/s) ] / ( 55Kg + 25Kg) Vf = (200 Kg m/s ) / (80Kg) Vf = 2.5 m/s Therefore, Combined speed for Ben and Junior after collision is 2.5 m/s Compare the speed of the marbles at the end of each ramp. Explain your reasoning.Marble A: The marble has an increasing speed since the slope is constant. Marble B: The speed of marble increases gradually when the marble is at the center of ramp since because there is a sharp curve. Marble C: The marble has gradual speed due to sharp slope but it comes to a state of gradual decline of speed towards the end of the ramp. Marble D: The marble’s initial speed is higher but decreases as the ramp starts to curve inside. Work done for the sack flour is 600(0.5) =300The distant for the push is 150(d)=300 d=300 equals 2m 150A huge yield of power for the six straightforward machines is upgraded by information power for lift substantial load. This impact is referred as leverage. Enormous burdens can be lifted by utilizing little exertion. The separation of burden for the lift of heaps relies on support of level. A, D, B, C =4000/4 =1000N There is need to dispatch a satellite in round circle with explicit level speed to drive the satellite to the earth circle. Satellite will tend to ship away at the point they are propelled with subsequent tallness in an explicit speed towards focal point of the earth which is affected by forces of gravity. The beginning of circling, there is no outside contacts with the earth surface due to level speed for flow and ebb of earth. The straight fall is affected by earth gravity instead of circling the earth because there is no level speed. The explicit horizontal velocity for the satellite in the circular orbit is critically comprehended to be explicit. This is because the earth tends to bend after 8 Km and have a diminishing vertical stature of 5m for flow and ebb of earth. This makes the body circle of the earth which tends to accelerate at 8km/s with insightful coordination of earth circle with horizontal velocity. The velocity is normally slighter than the rumple the earth will produce. When the satellite has a higher flat speed, there is a limit of speed since there will be a gravitational hover in different planets of earth through a continuous moving space. The gravitational power helps a body to come to the surface from a certain stature. The body come rapidly to the ground with grounded gravity power. In the same way, the gravitational power stops the feeble with the movement of body from the earth. There are no lower elevation places with higher gravitational focus. The highest place of Everest has moderate gravitational force which is more fragile compared to that of New York. This means mean an object will tumble in the ground first than in Everest.There are weightless impacts for weightlessness for space station since they tend to fall openly to the earth surface. There is equal impact on the space boats for the weightlessness inside because there is unreserve fall towards the earth surface. The fast flow of the earth does not come into contact with circling earth. The gravitational power is ideally weightlessness since there is no forces of gravity acting in space. The gravitational power is ideally frail because space travelers are able to fall freely towards the earth surface. In the same way weightless act on space travelers, high-flying plane seems to be weightless in the space station but plane does not feel the free-fall towards earth surface like it happens to shuttle. The weightless impact is caused by free-fall. The plane traveler can feel weightlessness when the plane begins to tumble until the tallness crashes to the earth surface. The plane does not have required speed to constrain them in earth’s circle when they strike the earth surface. The movement of the dart makes the monkey to hit dart to pursue the shot movement when officer shoot. This make the monkey to be in the dart way when hit. The off shot of the monkey generates a movement that goes beneath the monkey while it still remains in the branch. There are no gravitational forces acting in the straight line when pointed at the dart. A slight movement of the monkey makes the dart to be hit with no gravitational forces. The remaining questions are multiple-choice questions: BBECCDC
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