Question

please need these answered clearly and correctly please, need it them done just quick to pass my class by tonight, questions 3-5

M i ques more work: Stretching a stiff spring a certain distance or stretching a weak spring the same distance? Defend your answer. - Stretching a stiff spring. This is simply because a stiff spring is more resistant to movement which requires more force or work to move it. 3. An object that has a small mass and an object that has a large mass have the same momentum. Which object has the largest kinetic energy? 3 7. 4. An object that has a small mass and an object that has a large mass have the same kinetic energy. Which mass has the largest momentum? 5. When a rifle with a longer barrel is fired, the force of expanding gases acts on the bullet for a longer distance. What effect does this have on the velocity of the emerging bullet? 6. Why does the force of gravity do work on a car that rolls down a hill, but no work when it rolls along a level part of the road? Must the total energy of a system be conserved whenever its momentum is conserved? Explain why or why not. Give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this is accomplished without doing work. w=fd coso work depends on three factors: displacements, force, and angle betwwenn force and displacement. As force is applied to an object but there is no displacement, it means that there is no work done by the applied force. For example: in case of a cyclist moving in a circuluar path her displacement is zero WEO D. Focus