What is the centripetal force that allows a car to move around a sharp curve in a roadway?

Answers

Answer 1

Answer: For a level curve, the centripetal force will be supplied by the friction force between the tires and roadway.

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A passenger on a boat moving at 1.70 m/s on a still lake walks up a flight of stairs at a speed of 0.60 m/s , as shown in the figure . The stairs areangled at 45o pointing in the direction of motion as shown.

Write the vector velocity of the
passenger relative to the water.
Express your answer using two significant figures. Express
your answer in terms of the
unit vectors i
and j.

Answers

If you wish, you could choose i to be in the same direction as the motion and j in perpendicular direction (upwards).
The two speeds could be expressed as vectors. The speed of the boat is merely $1.7i+0j$ . The speed of the climbing man, using the boat as reference, is more complicated. It is $(0.60)/(√(2))i+(0.60)/(√(2))j=0.30√(2)i+0.30√(2)j$ . Calculate the sums of the two and the speed itself.

An 84 kg skydiver is observed to be falling at an acceleration of 5 m/ second squared. What is the magnitude of the force of air resistance on the skydiver?Is the answer 1243.2 N

Answers

Answer:i dont know

Explanation:i dont know

A person of mass 80 kg stands on Earth's surface. What is his weight?

Answers

Weight is always (mass) times (gravity in the place where you are).

On Earth, acceleration due to gravity is 9.8 m/s² ,
so the person's weight is

(80 kg) x (9.8 m/s²) = 784 newtons .

(about 176.4 pounds)

The answer is 784 newtons. I hope that helps you :]

What is the approximate weight of a 20-kg cannonball on earth?

Answers

The weight of an object is taken to be the force on the object due to gravity. The weight ( W ) is the product of the mass ( m ) of the object and the magnitude of the gravitational acceleration ( g ).
On Earth: g = 9.81 m/s²
m = 20 kg
W = m · g = 20 kg · 9.81 m/s² = 196.2 N

What is the address of the earth?

Answers

Earth is a planet located in the milky way galaxy.

Two objects move toward each other because of gravitational attraction. As the objects get closer and closer, the force between them _____. A. remains constant B. decreases C. increases

Answers

As 2 objects get closer and closer due to the gravitational attraction, the force between them C. increases.

Two objects move toward each other because of gravitational attraction. To understand the gravitational force, we need to consider Newton's law of universal gravitation, which states that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Mathematically,

$F = G (m_1m_2)/(r^(2) )$

where,

F: gravitational force
G: gravitational constant
m₁: mass of object 1
m₂: mass of object 2
r: distance between centers of the masses

As the objects get closer, the distance between them decreases, and consequently the gravitational force increases.

As 2 objects get closer and closer due to the gravitational attraction, the force between them C. increases.

Learn more: brainly.com/question/11033817

Answer:

C. increases

Explanation:

Law of Universal Gravitation

This law establishes that bodies, by simply having mass, experience a force of attraction to other bodies with mass, called gravitational force or gravitational force.

The gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance that separates them.

$F_(g) =G((M*m)/(r^(2) ) )$ Formula (1)

where:

G is the universal gravitation constant, G = 6.67 · 10-11 N · m² / kg²

M and m are the masses of the bodies that interact (kg)

r is the distance that separates them. (m)

Problem development

As objects get closer and closer the distance (r) that separates them decreases and because M, m and G remain constant, in formula (1):

$F_(g) =G((M*m)/(r^(2) ) )$

, if r decreases then Fg increases.

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Which of the following accurately describes junction diodes? A. In a forward-biased setup, large numbers of charge carriers will be pulled across the junction and result in a large current. B. Free electrons are concentrated in the P-type material and holes form in the N-type material. C. The negative terminal of the source of voltage is connected to the N-type material within a reverse-biased setup. D. Only a small current will flow through the diode in the forward-biased setup.