![]() An impulse of 100-units would be required to stop the ball. Suppose a ball is coming at you with 100-units of momentum. Increasing the time over which the ball's momentum is brought to 0 will decrease the force required to stop it. the resulting impact velocity is lessened.This habit causes the force of impact on the players hand to be reduced in size principally because _. In order to catch a ball, a baseball player naturally moves his or her hand backward in the direction of the ball's motion once the ball contacts the hand. Thus, rockets indeed can and do accelerate in outer space.ġ1. ) and the gases push the rocket forwards (or leftwards, or rightwards, or. The rocket's thrusters push these gases backwards (or rightwards, or leftwards, or. The combustion of rocket fuels produces gaseous products. Rockets produce their own gas by burning fuels. It does not matter that there is no air outside of the rocket. Rockets accelerate in outer space by means of Newton's third law of motion. nonsense! Rockets do accelerate in outer space. It is NOT possible for a rocket to accelerate in outer space because _. The lower mass object always receives the greater velocity change and acceleration.ġ0. Only the acceleration and the velocity change can differ for the two colliding objects. Each object experiences the same force (Newton's third law) for the same amount of time, leading to the same impulse, and subsequently the same momentum change. In any collision, there are always four quantities which are the same for both objects involved in the collision. impulse on both the block and the expert's hand have the same magnitude.force on both the block and the expert's hand have the same magnitude.time of impact on both the block and the expert's hand is the same.During the collision between her hand and the block, the _. During a talent show, she executes a swift blow to a cement block and breaks it with her bare hand. Thus, for the same collision time, bouncing involves a greater velocity change, a greater momentum change, and therefore a greater impulse.ĩ. If the ball bounces, then there is an additional velocity change sending the ball back upwards opposite the original direction. This decrease in velocity constitutes the first portion of the velocity change. Upon collision with the ground, the velocity will have to be reduced to zero - that is, the ball will cease moving downwards. Since being dropped from the same height, the balls will be moving with the same pre-collision velocity (assuming negligible air resistance). For the same collision time, impulses are smaller when the most bouncing take place. TRUE or FALSE: A ball is dropped from the same height upon various flat surfaces. So for the same speed, a doubling of mass leads to a doubling of momentum.Ĩ. Momentum is directly related to the mass of the object. If it moves at the same speed but has twice as much mass, its momentum is _. A truck driving along a highway road has a large quantity of momentum. It matters not whether the object is of large mass or small mass, moving with constant speed or accelerating if the object is MOVING, then it has momentum!ħ. An object has momentum if it has its mass in motion. Momentum can be thought of as mass in motion. The high school building rests in the middle of town. A Yugo (a compact car) is moving with a constant speed.ĭ. A small flea walking with constant speed across Fido's back.Į. A UPS truck is stopped in front of the school building.Ĭ. An electron is orbiting the nucleus of an atom.ī. Which of the following objects have momentum? Include all that apply.Ī. Momentum and Collisions - Home || Printable Version || Questions with LinksĪnswers to Questions: All || #1-5 || #6-36 || #37-56 || 57-72Ħ. Somehow the diagnosis of the probem ( i.The Review Session » Momentum and Collisions » Answers Q#6-36 Momentum and Collisions Review This also makes it difficult to get insurers to pay for nicotine replacements. Getting sphygmomanometers and peak flow meters into the hands of patients is also difficult without the diagnosis on the problem list being preserved over time. IT often scrubs these diagnoses off the problem list for the patient which is another problem, so billing for brief counseling interventions Getting providers to diagnose the hypertension problem and low peak flow problem is not so easy and getting the providers to make the diagnosis of tobacco/cannabis/methamphetamine/heroin use disorders that entail smoking Identifying smokers with B/P over 140/90 and peak flows below 300 is easy. Did you find this user comment useful? people found this user comment useful.
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