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Shtirlitz [24]
3 years ago
11

A police car in a high-speed chase is traveling north on a two-lane highway at 35.0 m/s. In the southbound lane of the same high

way, an SUV is moving at 18.0 m/s. Take the positive x-direction to be toward the north. Find the x-velocity of the police car relative to the SUV.
Physics
1 answer:
Sati [7]3 years ago
3 0

Answer:

53 m/s

Explanation:

Since we take the positive x-direction to be toward the north, an SUV travelling to the south would have a negative velocity, -18m/s, relative to Earth. Velocity of Earth relative to the SUV would be 18m/s. And velocity of police car relative to Earth would be positive, 35 m/s.

Velocity of police relative to SUV would equal to velocity of police car relative to Earth plus velocity of Earth relative to SUV

= 35 + 18 = 53 m/s

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atroni [7]

Answer:

B.6

Explanation:

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= 75m / 12s

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4 years ago
A car accelerates uniformly from rest to a speed of 23.7m/s in 6.5 seconds. Find the distance the
frez [133]

The car's average speed during that time is (23.7/2) = 11.85 m/s .

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5 0
4 years ago
Now suppose that the Earth had the same mass and radius as it currently does, but all of the mass was concentrated into a thin (
KiRa [710]

Answer:

The force of gravity at the shell will be extremely great on me due to the huge mass collapsed into the small radius.

<em>At the center of the shell, the gravitational forces all around should cancel out, giving me a feeling of weightlessness; which will be a lesser force compared to that felt while standing on the shell.</em>

<em></em>

Explanation:

For the collapsed earth:

mass = 5.972 × 10^24 kg

radius = 1 ft

according to Newton's gravitation law, the force of gravity due to two body with mass is given as

Fg = GMm/R^{2}

Where Fg is the gravitational force between the two bodies.

G is the gravitational constant

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m is my own mass

R is the distance between me and the center of the earths in each case

For the case where I stand on the shell:

radius R will be 1 ft

Fg = GMm/1^{2}

Fg = GMm

For the case where I stand stand inside the shell, lets say I'm positioned at the center of the shell. The force of gravity due to my mass will be balanced out by all other masses around due to the shell of the hollow earth. This cancelling will produce a weightless feeling on me.

3 0
3 years ago
What is a simple pendulum?
soldier1979 [14.2K]

Answer:

A pendulum is weight suspended from a pivot so that it can swing freely

8 0
4 years ago
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Norma-Jean [14]

Answer:

26.64 m

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Acceleration at ocean surface = 0.0800 m/s²

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Using the equation :

v² = u² + 2as

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Therefore,

v² = u² + 2as

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s = 26.64 m

7 0
3 years ago
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