This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A person ties a rock to a string and whirls it around in a vertical circle such that sometimes the ... (Read 32 times)

joesmith1212

  • Hero Member
  • *****
  • Posts: 549
on: Jul 29, 2018
A person ties a rock to a string and whirls it around in a vertical circle such that sometimes the rock is going straight upward and sometimes the rock is going straight down.
 
  She whirls the rock at the minimum speed (constant in time) such that the string is always taut (no sag). If she were to use a longer string, she would have to whirl the rock at a
  A) higher velocity.
  B) lower velocity.
  C) the same velocity.

Question 2

A 2.00-kg object traveling east at 20.0 m/s collides with a 3.00-kg object traveling west at 10.0 m/s. After the collision, the 2.00-kg object has a velocity 5.00 m/s to the west. How much kinetic energy was lost during the collision?
 
  A) 91.7 J B) 0.000 J C) 458 J D) 175 J E) 516 J


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Anton

  • Sr. Member
  • ****
  • Posts: 302
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

C


joesmith1212

  • Member
  • Posts: 549
Reply 2 on: Jul 29, 2018
Gracias!

mohan

  • Member
  • Posts: 362
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

An example of layers, or strata, of sedimentary rock that contain fossils An example of layers, or strata, of sedimentary rock that contain fossils
How Seismic Waves Pass through Rock How Seismic Waves Pass through Rock
Funerary mask (Mask of Agamemnon), from Grave Circle A, Mycenae, Greece. Funerary mask (Mask of Agamemnon), from Grave Circle A, Mycenae, Greece.
A well-folded letter fits easily into the envelope and is easily removed by the person who receives ... A well-folded letter fits easily into the envelope and is easily removed by the person who receives ...
Brushing off to finish-front. Move to the front and place the person’s hands on his or her knees. ... Brushing off to finish-front. Move to the front and place the person’s hands on his or her knees. ...
MRI scans of normal elderly person compared to one with Alzheimer's MRI scans of normal elderly person compared to one with Alzheimer's
Video: Sigmoidoscopy

For a complete list of videos, visit our video library