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Blababa [14]
4 years ago
13

You are driving north on a highway. then, without changing speed, you round a curve and drive east. does your velocity change? d

o you accelerate? explain.
Physics
2 answers:
Karolina [17]4 years ago
6 0
Good afternoon!


The velocity vector changes from direction, but the velocity value is constant, since its value do not change.

Yes, you accelerate, since the only way to make an object change its direction(and inertia) is applying a force to it. With a force, we always have acceleration. In this case, you gain a centripetal acceleration, that is responsible to change the direction, but not the value of the velocity.
Radda [10]4 years ago
6 0

Explanation:

In this case, the driver is driving towards north on a highway. The driver doesn't changes speed, rounds a curve and drive east. We know that, speed is a scalar quantity and velocity is a vector quantity.

The driver is changing the direction of motion, so its velocity changes. On the curve, the driver will have centripetal acceleration. As we know that the change in velocity per unit time is called acceleration.

Hence, this is the required solution.

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VMariaS [17]

Answer:

acceleration = final velocity - initial velocity / time

V-U/T

Explanation:

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt.

7 0
3 years ago
8. Radioactive isotopes, differentiation of Earth’s iron core, gravity-driven compression,and meteoric bombardment all caused ea
Olegator [25]

Answer:

option C

Explanation:

the correct answer is option C.

All the activity such as Radioactive isotopes, differentiation of Earth’s iron core, gravity-driven compression,and meteoric bombardment will make the earth hotter than what it is at present.

Radioactive isotope  whose nuclei are unstable dissipate excess energy.

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meteorite bombardment will affect the atmosphere of the earth which protect harmful radiation.

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3 years ago
a person can throw a 300 gram ball at 25 m/s the maximum height the person can throw the ball on Earth?​
jolli1 [7]

Answer:

Elevation =31.85[m]

Explanation:

We can solve this problem by using the principle of energy conservation. This consists of transforming kinetic energy into potential energy or vice versa. For this specific case is the transformation of kinetic energy to potential energy.

We need to first identify all the input data, and establish a condition or a point where the potential energy is zero.

The point where the ball is thrown shall be taken as a reference point of potential energy.

E_{p} = E_{k} \\where:\\E_{p}= potential energy [J]\\ E_{k}= kinetic energy [J]

m = mass of the ball = 300 [gr] = 0.3 [kg]

v = initial velocity = 25 [m/s]

E_{k}=\frac{1}{2}  * m* v^{2} \\E_{k}= \frac{1}{2} * 0.3* (25)^{2} \\E_{k}= 93.75 [J]

93.75=m*g*h\\where:\\g = gravity = 9.81 [m/s^2]\\h = elevation [m]\\replacing\\h=\frac{E_{k}}{m*g} \\h=\frac{93.75}{.3*9.81} \\h=31.85[m]

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4 years ago
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Answer:

yes

Explanation:

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3 years ago
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