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3 years ago

12

The force on the projectile is constant throughout the flight * True False

2 answers:

mina [271]3 years ago

6 0

It’s true of course

makkiz [27]3 years ago

4 0

It’s true for sureeeeeeeee

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Why the dust particles undergoes small random movements? <br><br> Plz help!!?

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3 years ago

A sinusoidal wave travels along a string. if the time for a particular point to move from maximum displacement to zero displacem

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3 years ago

a ray of light strikes a plane mirror at an angle of 53 degrees to the normal. what is the angle of reflection?

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3 years ago

A horizontal vinyl record of mass 0.10 kg and radius 0.10 m rotates freely about a vertical axis through its center with an angu

Tresset [83]

Answer:

The angular speed of the record is 3.36 rad/s.

Explanation:

Given that,

Mass of record= 0.10 kg

Radius = 0.10 m

Angular speed = 4.7 rad/s

Moment of inertia $I=5.0\times10^{-4}\ kgm^2$

Mass of putty = 0.020 kg

We need to calculate the angular speed

Using law of conservation of momentum

$L_{i}=L_{f}$

$I\omega_{i}=(I+mr^2)\omega_{f}$

$\omega_{f}=\dfrac{I\omega_{i}}{(I+mr^2)}$

Put the value into the formula

$\omega_{f}=\dfrac{5.0\times10^{-4}\times4.7}{5.0\times10^{-4}+0.020\times(0.10)^2}$

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4 years ago

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3 years ago

Read 2 more answers