« 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 56 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?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Top to bottom: tiger, lion, jaguar, and leopard. Top to bottom: tiger, lion, jaguar, and leopard.
Assessing Height & Weight Assessing Height & Weight
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.
Apply thumb strokes on foot bottom and toes. Hold the baby’s foot bottom-up and use thumbs to ... Apply thumb strokes on foot bottom and toes. Hold the baby’s foot bottom-up and use thumbs to ...
A Healthy Body Weight A Healthy Body Weight
Sheep Fiber Length (cm) vs Fleece Weight (kg) Sheep Fiber Length (cm) vs Fleece Weight (kg)
Video: Four Giant Convection Cells oF Earth

For a complete list of videos, visit our video library