Recent content by ZCV99

Would the impulse then be 54m N*s, since the maximum velocity is 39m/s, outlined above, and the minimum velocity is the area between the x-axis and the curve is about 0.5*3seconds*-10m/s^2=-15m/s, so 39m/s*m--15m/s*m=54m N*s? Also, what about question E? I know that the magnitude of the impulse...

I'm sorry but I am still extremely confused. It appears that the acceleration starts increasing from its initial -9.8m/s^2 almost as soon as the doll is dropped, which means that the cord was taut from this moment. Can I find impulse by finding the acceleration halfway between the minimum and...

During freefall the acceleration of the doll would be a constant -9.8m/s^2, right? Yet the acceleration does not stay constant, which is why I thought that the cord was taut from the beginning. Does it actually become taut when the net force and the acceleration of the object is zero?

Oh, so the tension of the cord is always pulling on the doll, and acceleration is based on the Net Force acting on the doll. That would mean that the cord starts to pull upward at 5 seconds when the doll is first dropped, right? Since the force of gravity acting on the doll increases when mass...

Homework Statement An small doll is attached to an elastic cord which is suspended from a support as shown. An accelerometer is attached to the doll. The doll is allowed to fall and produces the graph shown. When the recording system is started the doll is stationary at the upper support...

The graph can also be found here: http://www.narragansett.k12.ri.us/NHS/scienceweb/quansweb/bungee.htm

Homework Statement https://bb9.waukesha.k12.wi.us/bbcswebdav/pid-692070-dt-content-rid-2436419_1/xid-2436419_1 The graph above was made from acelerometers placed on a person while experiencing a bungee jump. The graphed data is not smooth because it is real data. The positive direction is...

Thank you so much everyone for your replies. I was not given any information regarding the friction between the dog and the sled, so I think this means that I am supposed to treat them as a single system.

Homework Statement A man pulls a 15-kg sled containing a 5.0-kg dog along a straight path on a horizontal surface. He exerts a force of 55 N on the sled at an angle of 20.° above the horizontal, as shown in the figure above. The coefficient of friction between the sled and the surface is 0.22...

Hi, I am a new member here. I am currently taking an online AP Physics class in high school. I took the class online because my high school's science department is not very strong at all, but I am struggling with teaching myself and understanding a lot of concepts in Physics, so I really hope...