« previous next »

Author Question: Five boxes, each having weight 100 N, are stacked up. The bottom box is the fifth from the top. What ... (Read 53 times)

EY67

  • Hero Member
  • *****
  • Posts: 531
on: Jul 28, 2018
Five boxes, each having weight 100 N, are stacked up. The bottom box is the fifth from the top. What is the magnitude of the normal force upward exerted by the third box from the top on the second box from the top?
 a. 100 N
  c. 300 N
  b. 200 N
  d. 400 N

Question 2

If the drag force on a car is F at a moderate highway speed v, at what speed would the drag force be doubled?
 a. 1.2v
  c. 1.7v
  b. 1.4v
  d. 2.0v


chevyboi1976

  • Sr. Member
  • ****
  • Posts: 344
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

EY67

  • Hero Member
  • *****
  • Posts: 531
Reply #2 on: Jul 28, 2018
Thanks


chevyboi1976

  • Sr. Member
  • ****
  • Posts: 344
Reply #3 on: Jul 28, 2018
Welcome :)


« previous next »
 

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

This pediatric growth chart tracks the height and weight for girls ages 2–20. This pediatric growth chart tracks the height and weight for girls ages 2–20.
The diminishing effects on body weight of a low-calorie diet and a high-calorie diet. The diminishing effects on body weight of a low-calorie diet and a high-calorie diet.
Gently squeeze along the length of each toe. Move proximal to distal. Squeeze top and bottom first, ... Gently squeeze along the length of each toe. Move proximal to distal. Squeeze top and bottom first, ...
In Maslow's view, needs operate from the bottom up in this needs hierarchy In Maslow's view, needs operate from the bottom up in this needs hierarchy
Genes, hormones, and activity affect weight Genes, hormones, and activity affect weight
A solution is 2.25% by weight KHCO3. How many grams of KHCO3 are in 150.0 g of solution? A solution is 2.25% by weight KHCO3. How many grams of KHCO3 are in 150.0 g of solution?
Video: Calvin cycle (The light-independent reactions )

For a complete list of videos, visit our video library