3 years ago

How do you calculate acceleration?

Physics

2 answers:

wariber [46]3 years ago

7 0

Acceleration = (change in speed) / (time for the change)

ohaa [14]3 years ago

3 0

F= total force
M= mass
A= acceleration

F= m•a

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When electrons in an atom in an excited state fall to lower energy levels, energy is?

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Radiated away as electromagnetic radiation.

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3 years ago

During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive

Alex

Answer:

616.223684211 N

Explanation:

$F_r$ = Resistive force on the wheel = 115 N

F = Force acting on sprocket

$r_2$ = Radius of sprocket = 4.75 cm

$r_1$ = Radius of wheel = 25 cm

Moment of inertia is given by

$I=mr_1^2\\\Rightarrow I=1.7\times 0.25^2\\\Rightarrow I=0.10625\ kgm^2$

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$\tau=I\alpha\\\Rightarrow \tau=0.10625\times 4.9\\\Rightarrow \tau=0.520625\ Nm$

Torque is given by

$\tau=Fr_2-F_rr_1\\\Rightarrow F=\dfrac{\tau+F_rr_1}{r_2}\\\Rightarrow F=\dfrac{0.520625+115\times 0.25}{0.0475}\\\Rightarrow F=616.223684211\ N$

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3 years ago

A firecracker is thrown downward from a height of 2.75m above the ground, with a speed of 3.15m/s. Ignore air resistance, determ

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Here in this question as we can see there is no air friction so we can use the principle of energy conservation

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now here we know that

$h_1 = 2.75 m$

$v_i = 0$

$v_f = 5.23 m/s$

now plug in all values in above equation

$mg*2.75 + 0 = mgh + \frac{1}{2}m(5.23)^2$

divide whole equation by mass "m"

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$9.8*h = 13.27$

$h = 1.35 m$

so height of the ball from ground will be 1.35 m

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3 years ago

A black hole is a ________

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Answer:

Answer to the question:

Explanation:

A black hole is a finite region of space within which there is a mass concentration high and dense enough to generate a gravitational field such that no material particle, not even light, can escape it.

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3 years ago

What factors the weight of an object?

MAVERICK [17]

Answer:

Gravity

Explanation:

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4 years ago