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2 years ago

6

Kinetic energy is _____.inversely proportional to mass and velocity directly proportional to mass and velocity directly proporti

onal to mass and inversely proportional to velocity inversely proportional to mass and directly proportional to velocity

2 answers:

oee [108]2 years ago

7 0

Answer : The correct option is, directly proportional to mass and velocity.

Explanation:

Kinetic energy : It is associated with the state of motion of an object.

The formula used for kinetic energy is,

$K.E=\frac{1}{2}mv^2$

where,

m = mass of an object

v = velocity or speed of an object

From the formula of kinetic energy we conclude that,

The kinetic energy is directly proportional to the mass and the velocity of an object.

Hence, the kinetic energy is directly proportional to mass and velocity.

saw5 [17]2 years ago

3 0

Directly proportional to mass and velocity

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A 3.00-kg ball swings rapidly in a complete vertical circle of radius 2.00 m by a light string that is fixed at one end. The bal

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Answer:

The gravity does a work of - 117.6 Joules.

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Explanation:

The work done by the gravity simply is the difference in gravitational potential energy multiplied by -1:

$W_g = - \Delta E_p = - (mgh_f - m g h_i)$

where m is the mass of the ball, g is the acceleration due to gravity, $h_f$ is the final height and $h_i$ is the initial height.

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2 years ago

Which of the the following distance vs time graphs represents an object the is moving at constant non zero velocity

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3 years ago

A5.0 kg TNT explosive, initially at rest, explodes into two pieces. One of the pieces weighing 2.0 kg flies off to

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3 years ago

An object is moving along a straight line, and the uncertainty in its position is 1.90 m.

just olya [345]

Answer:

$2.78\times 10^{-35}\ \text{kg m/s}$

$6.178\times 10^{-34}\ \text{m/s}$

$0.31\times 10^{-4}\ \text{m/s}$

Explanation:

$\Delta x$ = Uncertainty in position = 1.9 m

$\Delta p$ = Uncertainty in momentum

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m = Mass of object

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$\Delta x\Delta p\geq \dfrac{h}{4\pi}\\\Rightarrow \Delta p\geq \dfrac{h}{4\pi\Delta x}\\\Rightarrow \Delta p\geq \dfrac{6.626\times 10^{-34}}{4\pi\times 1.9}\\\Rightarrow \Delta p\geq 2.78\times 10^{-35}\ \text{kg m/s}$

The minimum uncertainty in the momentum of the object is $2.78\times 10^{-35}\ \text{kg m/s}$

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$m=0.045\ \text{kg}$

Uncertainty in velocity is given by

$\Delta p\geq m\Delta v\geq 2.78\times 10^{-35}\\\Rightarrow \Delta v\geq \dfrac{2.78\times 10^{-35}}{m}\\\Rightarrow \Delta v\geq \dfrac{2.78\times 10^{-35}}{0.045}\\\Rightarrow \Delta v\geq 6.178\times 10^{-34}\ \text{m/s}$

The minimum uncertainty in the object's velocity is $6.178\times 10^{-34}\ \text{m/s}$

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The minimum uncertainty in the object's velocity is $0.31\times 10^{-4}\ \text{m/s}$ .

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2 years ago