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4 years ago

Which object has the least amount of kinetic energy?

2 answers:

8 0

Kinetic energy is made when something is in motion. A bicycle locked to a bike rack has the least amount of kinetic energy.

Jlenok [28]4 years ago

6 0

Answer: The correct answer is "a bicycle locked to a bike rack".

Explanation:

The kinetic energy is due to the motion of the object.

The expression of the kinetic energy is as follows:

$KE=\frac{1}{2}mv^{2}$

Here, m is the mass of the object and v is the speed of the object.

In the option, a car driving down a road, the car has a kinetic energy due to the motion of the car.

In the option, a soccer ball rolling down a hill , the soccer ball has a kinetic energy due to the motion of the soccer ball.

In the option, a bicycle locked to a bike rack, the kinetic energy of a bicycle is zero as the bicycle is locked. It is not moving.

In the option, a satellite orbiting Earth, the satellite has a kinetic energy as it is orbiting the earth.

Therefore, the correct option is "a bicycle locked to a bike rack".

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In the diagram, q1 = +1.39*10^-9 C and q2 = +3.22*10^-9 C. The electric field at point P is zero. What is the distance from P to

Sphinxa [80]

Answer:

0.388

Explanation:

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4 years ago

two identical steel balls mounted on wooden posts initially have different amounts of charge, one -14цC and the other +2цC. the

larisa86 [58]

-6 and -6 (each)

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3 years ago

Why must we be careful when measuring current with a DMM?

Lemur [1.5K]

Answer:

DMM should be placed in the series combination with the circuit.

Explanation:

DMM is the digital multi meter. It can measure the voltage, current and resistance at a time.

While measuring the current with the DMM you must be ensure that the DMM should be connected with the circuit in series combination. So that it will give the resultant current accurately.

While measuring the voltage the observer should check the open probes.

4 0

3 years ago

Suppose that the Millennium Falcon orbits the Death Star 20,000m above the Star’s surface. Calculate the circular orbit velocity

Nataly [62]

Answer:

18.4 m/s

Explanation:

The gravitational force between the Death Star and the Millenium Falcon is equal to the centripetal force that keeps the Millenium Falcon in circular orbit:

$G\frac{Mm}{(R+h)^2}=m\frac{v^2}{R+h}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2}$ is the gravitational constant

$M=5.1\cdot 10^{17} kg$ is the mass of the planet

$m=1.36\cdot 10^6 kg$ is the mass of the Millennium Falcon

$v$ is the orbital velocity of the Millennium Falcon

$R=\frac{160,000 m}{2}=80,000 m$ is the radius of the Death Star

$h=20,000 m$ is the altitude of the Millennium Falcon above the planet's surface

Solving the equation for v, we find the orbital velocity:

$v=\sqrt{\frac{GM}{R+h}}=\sqrt{\frac{(6.67\cdot 10^{-11})(5.1\cdot 10^{17} kg)}{80,000 m+20,000 m}}=18.4 m/s$

5 0

3 years ago

What is an uncharged body? In physics (simple words)

andriy [413]

An uncharged body is a body that has equal magnitude of positive as well as negative charge on it. So as soon as some charged body is placed near it, the charged body induces negative charges on the uncharged body.

4 0

3 years ago