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3 years ago

A crash test dummy is inside a test car moving at 55 km/h. How fast is the dummy moving relative to the seat he is sitting in?

2 answers:

8 0

The situation is exactly the same as YOUR speed relative to the seat you're sitting in, aboard the passenger jet flying at 500 mph with you in it.

kvasek [131]3 years ago

7 0

The dummy is moving with a speed 0 km/h relative to the seat in which it is sitting.

If the relative speed was non-zero, the dummy would move away from its seat, which contradicts the problem formulation.

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What is total revenue in economics

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Answer:

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3 years ago

Most geologists think that the movement of Earth's plates is cause by

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Convection currents in the mantle

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3 years ago

A bird flies from the South Pole to the North Pole. Part of the journey is 1000 miles that takes 2 weeks. What is the bird’s vel

viktelen [127]

1000 miles = 1610km = 1.61x10^6m
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V=d/t = 1.61x10^6/14x24x1440
= 3.33m/s

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3 years ago

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Name two possible ways in wivh fossils can be dated and define them <br>

Vikentia [17]

Answer:

There are two main methods determining a fossils age, relative dating and absolute dating. Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.

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3 years ago

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81. a baseball is hit straight up and is caught by the catcher 2.0 s later, at the same height at which it left the bat. the max

andrew-mc [135]

The maximum height of the ball during this interval is 4.9 m (Option A)

<h3>How to determine the time to reach maximum height</h3>

The time taken to reach the maximum height can be obtained as follow:

Time for the entire trip (T) = 2 s
Time to reach maximum height (t) = ?

T = 2t

2 = 2t

Divide both side by 2

t = 2 / 2

t = 1 s

<h3>How to determine the maximum height reached by the ball</h3>

The maximum height reached by the ball can be obtained as follow:

Acceleration due to gravity (g) = 9.8 m/s²
Time to reach maximum height (t) =?
Maximum height (h) =?

h = ½gt²

h = ½ × 9.8 × 1²

h = ½ × 9.8 × 1

h = 4.9 m

Thus, the maximum height reached by the ball is 4.9 m (Option A)

Learn more about motion under gravity:

brainly.com/question/22719691

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7 0

1 year ago