3 years ago

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Physics

1 answer:

rjkz [21]3 years ago

6 0

Answer:

I'm positive it's the last one

Explanation:

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Uranus is much much larger than Earth, so the distance from the planet's center is much much greater

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3 years ago

What are the three ways acceleration can occur

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Answer:

Change in velocity, change in direction, change in both velocity and direction

Explanation:

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2 years ago

A pendulum is raised to a height of 0.3m above its lowest point and released. What is the velocity of the pendulum at its lowest

enyata [817]

Answer:

v = 2,425 m / s

Explanation:

A simple pendulum has anergy stored at the highest point of the path and this energy is conserved throughout the movement.

highest point

Em₀ = U = m g y

lowest point

$Em_{f}$ = K = ½ m v²

Em₀ = Em_{f}

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let's calculate

v = √ (2 9.8 0.3)

v = 2,425 m / s

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3 years ago

A driver has a reaction time of 0.50 s , and the maximum deceleration of her car is 6.0 m/s^2 . She is driving at 20 m/s when su

QveST [7]

Answer:

The car stops after 32.58 m.

Explanation:

t = Time taken for the car to stop

u = Initial velocity = 20 m/s

v = Final velocity = 0

s = Displacement

a = Acceleration = -6 m/s²

Time taken by the car to stop

$v=u+at\\\Rightarrow t=\frac{v-u}{a}\\\Rightarrow t=\frac{0-20}{-6}\\\Rightarrow t=3.33\ s$

Total Time taken by the car to stop is 0.5+3.33 = 3.83 s

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=20\times 3.83+\frac{1}{2}\times -6\times 3.83^2\\\Rightarrow s=32.58\ m$

The car stops after 32.58 m.

Distance between car and obstacle is 50-32.58 = 17.42 m

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2 years ago

A battery is a source of:<br> a. current<br> b. voltage<br> c. resistance<br> d. all of these

kolezko [41]

The correct answer is b

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2 years ago