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3 years ago

An object is dropped at a height of 6 m from the ground. How fast is it moving just before it hits the ground?

Physics

1 answer:

maw [93]3 years ago

3 0

Explanation:

Given:

Δy = 6 m

v₀ = 0 m/s

a = 9.8 m/s²

Find: v

v² = v₀² + 2aΔy

v² = (0 m/s)² + 2 (9.8 m/s²) (6 m)

v ≈ 10.8 m/s

Round as needed.

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What are light years actually? answer in brief

a_sh-v [17]

A light year is a distance.
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The distance is about 5.875 trillion miles.
The nearest star outside our solar system is about 4.2 light years from us.

Sorry to have rambled on for so long.

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3 years ago

What does an object in equilibrium has a net force of .

Vlad1618 [11]

From our studies of the work of Professor Newton,
we have learned that

F = M a .

That is, the product of an object's mass and its acceleration
is equal to the net force acting on it.

An object in equilibrium is an object that has no acceleration.
In other words, it may be moving in a straight line at a speed
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4 years ago

A hockey puck sliding at 60.0m/s slows uniformly to 20.0m/s while travelling 800.0m.

julia-pushkina [17]

A) -3.75 meters/second
A=(20^2-80^2)/(2x800)
=(400-6400)/1600
=-6000/1600
=-3.75
B) 16 seconds
t=(20-80)/-3.75
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3 0

3 years ago

1. The arctic tern flies from the Arctic to the Antarctic and back every year, a total distance of 22,000 miles! In late summer,

NikAS [45]

Answer:

The average velocity that these birds travel is 122.22 miles per day to the south.

Explanation:

Speed is the physical quantity that expresses the variation in position of an object and as a function of time. In other words, speed is a physical quantity that expresses the relationship between the space traveled by an object, the time used for it and its direction.

Speed is expressed mathematically as the quotient between distance and time:

$v=\frac{d}{t}$

where "v" is the speed of the mobile, "d" is the distance traveled by the mobile, and "t" is the time taken by the mobile to carry out the movement.

In this case:

d= 11,000 miles
t=3 months= 90 days ( considering that in 1 month there are 30 days)

Replacing:

$velocity=\frac{11,000 miles}{90 days}$

velocity = 122.22 $\frac{miles}{day}$

<u><em>The average velocity that these birds travel is 122.22 miles per day to the south.</em></u>

8 0

3 years ago

A mass on a string is swung in a circle of radius 0.75m at 7.0m/s.what its rate of acceleration.

Ulleksa [173]

Explanation:

ac = v^2/r

= (7.0 m/s)^2/(0.75 m)

= 65 m/s^2

3 0

3 years ago