« previous next »

Author Question: A boy throws a ball with an initial velocity of 25 m/s at an angle of 30 above the horizontal. If ... (Read 280 times)

sheilaspns

  • Hero Member
  • *****
  • Posts: 567
on: Jul 29, 2018
A boy throws a ball with an initial velocity of 25 m/s at an angle of 30 above the horizontal. If air resistance is negligible, how high above the projection point is the ball after 2.0 s?
 
  A) 25 m B) 43 m C) 13 m D) 50 m E) 5.4 m

Question 2

A 320-g air track cart traveling at 1.25 m/s suddenly collides elastically with a stationary 270-g cart. What is the speed of the 270-g cart just after the collision?
 
  A) 0.678 m/s
  B) 0.106 m/s
  C) 1.36 m/s
  D) 1.14 m/s
  E) 2.72 m/s
Physics ¦ Walker ¦ 5th Edition
Buy Test-Bank


Li Jun

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

(a) Initial mtDNA results suggested modern humans and Neadertals were equally distantly related to D (a) Initial mtDNA results suggested modern humans and Neadertals were equally distantly related to D
Nickel ball Nickel ball
Velocity Velocity
A 500-kg cannon fires a 4.0-kg projectile with a velocity of 500 m/s relative to the ground. ... A 500-kg cannon fires a 4.0-kg projectile with a velocity of 500 m/s relative to the ground. ...
A bulldozer attempts to drag a log weighing 500 N along the rough horizontal ground. The cable ... A bulldozer attempts to drag a log weighing 500 N along the rough horizontal ground. The cable ...
An athlete stretches a spring an extra 40.0 cm beyond its initial length. How much energy has ... An athlete stretches a spring an extra 40.0 cm beyond its initial length. How much energy has ...
Video: Oxygen transport - methods and oxyhemoglobin

For a complete list of videos, visit our video library