All categories

3 years ago

In what frame of reference would you be at rest while riding in a car?

Physics

2 answers:

Alexeev081 [22]3 years ago

8 0

In the frame of reference of anybody in the car.

gulaghasi [49]3 years ago

8 0

<h2>Answer:</h2>

<u>We would be in the frame of reference to other people inside the car.</u>

<h2>Explanation:</h2>

In Physics the frame of reference is used for the observation and mathematical description of physical phenomena that occur around us and they formulate the physical laws with respect to others. In the given case all the people inside the car are the frame of reference to one another but if someone is outside of the car then his frame of reference will be changing as the car moves with respect to him.

You might be interested in

At a certain location, Earth's magnetic field of 34 µT is horizontal and directed due north. Suppose the net field is zero exact

zheka24 [161]

Answer:

a) I = 13.77 A

b) 0 ° or to the East

Explanation:

Part a

The magnetic field by properties would be 0 at the radius on this case r =8.1 cm.Analyzing the situation the wirde would produce a magnetic field equals in magnitude to the magnetic field on Earth by with the inverse direction.

The formula for the magnetic field due to a wire with current is:

$B = \frac{\mu_0 I}{2 \pi r}$

In order to have a value of 0 for the magnetic field at the radius then we need to have this balance

B (r=8.1) = B (Earth)

Replacing:

$B = \frac{\mu_0 I}{2 \pi r)}= B_{Earth}$

Solving from I, from the last equation we got:

$I = \frac{2 \pi r B_{earth}}{\mu_0}$

$I=\frac{2 \pi 0.081 m (34 x 10^{-6} T)}{4 \pi x 10^{-7} Tm/A}$ = 13.77 A

Part b

We can use the right hand rule for this case.

The magnetic field of the wire would point to the South, because the magnetic field of the earth given points to the North. Based on this the current need's to flow from West to East in order to create a magnetic field pointing to the south, because the current would be perpendicular to the magnetic field created.

8 0

3 years ago

The amount of kinetic energy an object has depends on its.

GarryVolchara [31]

<span>The amount of kinetic energy an object has depends on its "speed." Kinetic energy is energy a object has while its in motion so the key word is speed.

Hope this helps!
</span>

7 0

3 years ago

Read 2 more answers

AP Physics I, shouldn't be too hard.

Nana76 [90]

Answer:

The correct option is;

D. The kinetic energy decreases by 3·m₀·v₀²

Explanation:

The given parameters are;

The mass of object X = m₀

The initial velocity of object X = v₀

The mass of object Y = 2·m₀

The initial velocity of object Y = -2·v₀

By conservation of linear momentum, we have;

The total initial momentum = The total final momentum

Therefore, we have;

The total initial momentum = m₀·v₀ - 2·m₀·2·v₀ = The total final momentum

∴ The total final momentum = -3·m₀·v₀

The total mass of the two object after sticking together = 2·m₀ + m₀ = 3·m₀

Therefore, the velocity of the two objects after collision = (The total final momentum)/(Total mass) = -3·m₀·v₀/(3·m₀) = -v₀

The kinetic energy = 1/2 × Mass × (Velocity)²

Therefore, the kinetic energy after collision = 1/2 × (3·m₀) × v₀² = 3·m₀·v₀²/2

The kinetic energy before collision = 1/2 × m₀ × v₀² + 1/2 × (2·m₀) × (2·v₀)² = (1/2 + 4) × (m₀·v₀²)

∴ The kinetic energy before collision = 9·(m₀·v₀²)/2

The change in kinetic energy = The kinetic energy after collision - The kinetic energy before collision = 3·m₀·v₀²/2 - 9·(m₀·v₀²)/2 = -3·m₀·v₀²

Therefore, the kinetic energy decreases by 3·m₀·v₀².

5 0

3 years ago

According to newtons first law,if no net force acts on a object,the object continues in motion with?

Dovator [93]

The object keps going cause of wind friction

6 0

4 years ago

Read 2 more answers

A group of tissues working together with a common goal make up a(n) _________________.

natita [175]

Organ system is the correct response hope this helps

4 0

3 years ago