{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

PHYSICS HW 1 - velocity does not affect the time it takes...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Samantha Muller Physics 104 Chapter 1 1) The reason a dolphin can jump above the oceans surface with out gravity stopping it is because gravity is not powerful enough to stop the dolphin’s force going upward, gravity just ensures that what goes up must come down, which is why the dolphin does not stay above the water once it is above the surface. 4) The reason tapping your toothbrush on the sink to dry it off is an effective method is inertia. The toothbrush hits the sink but the water continues to move forward even though brush does not. 12) The sprinter travels that second 100 m in a quicker time than the first 100 m because during the first 100m the sprinter is acceleration because he/she starts from rest, but during the second 100m they are at a constant speed allowing them to finish faster. 15) The 2 balls hit the ground 1 second after they are dropped from different angles because horizontal and vertical motions are independent. The initial horizontal
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: velocity does not affect the time it takes the ball to descend from the ground. 18) If he wants to kick the ball so that it stays in the air for as long as possible he should kick it upward at a 45-degree angle. 24) When you kick a soccer ball the force is equal. Both you foot and the ball exert equal amounts of force on each other. 31) A person does more work lifting a grain of rice over its head opposed to an aunt, this is because the distance it greater when a human lifts the rice. 38) When your roller-skating on level pavement you can maintain speed but when you go up a hill your speed decreases because gravity is pulling you down, and the friction is less. 1) Mass- 800kg Acceleration- 4m/s2 Force-x Acceleration=net force/mass 4m/s2=x/800kg x=3200kg/s2= force 6) D=.5m Initial velocity=x 16) Work=force x distance X=...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern