« previous next »

Author Question: The speed of a 2.0-kg object changes from 30 m/s to 40 m/s during a 5.0-s time interval. During this ... (Read 49 times)

Sportsfan2111

  • Hero Member
  • *****
  • Posts: 585
on: Jul 28, 2018
The speed of a 2.0-kg object changes from 30 m/s to 40 m/s during a 5.0-s time interval. During this same time interval, the velocity of the object changes its direction by 90. What is the magnitude of the average total force acting on the object during this time interval?
 a. 30 N
  b. 20 N
  c. 40 N
  d. 50 N
  e. 6.0 N

Question 2

A 1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30 below the horizontal just before it strikes a horizontal surface. The ball leaves this surface 0.50 s later with a velocity of 2.0 m/s directed 60 above the horizontal. What is the magnitude of the average resultant force on the ball?
 a. 14 N
  b. 11 N
  c. 18 N
  d. 22 N
  e. 3.0 N


mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Sportsfan2111

  • Hero Member
  • *****
  • Posts: 585
Reply #2 on: Jul 28, 2018
Thank you!


mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #3 on: Jul 28, 2018
Always glad to help...


« previous next »
 

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

The Geologic Time Scale The Geologic Time Scale
Correct position when lifting a heavy object off the floor. Correct position when lifting a heavy object off the floor.
Object Perception and Boundaries Object Perception and Boundaries
Apply circular friction and direct pressure to suboccipital muscles one side at a time.Turn head to ... Apply circular friction and direct pressure to suboccipital muscles one side at a time.Turn head to ...
Press into points along the neck with your thumb, one side at a time. Apply circular friction to ... Press into points along the neck with your thumb, one side at a time. Apply circular friction to ...
Disitive Time For Milk Products Disitive Time For Milk Products
Video: Exocytosis - secretion

For a complete list of videos, visit our video library