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3 years ago

At which point of projectile motion kinetic energy is minimum

Physics

1 answer:

Gennadij [26K]3 years ago

5 0

Answer:

Therefore, at the highest or at maximum height, the net velocity is u= vocosθ. So, we can say that at the maximum height, the kinetic energy is minimum as the vertical velocity is zero.

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zaharov [31]

Answer:

9 - 10N to the left

10 - There is no change on the object

Explanation:

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3 years ago

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how many days does it take a team of drivers to drive a truck california and back to lansing if the drivers average 15m/s includ

Scilla [17]

Answer:

t = 2.2 [days] and is there is a round trip, it will be double time t = 4.4 [days]

Explanation:

First, we need to arrange the problem to work in the same unit system (SI).

We need to convert the 1800 [miles] to meters, therefore:

$1800[miles] * \frac{1609.34[m]}{1[mile]} }=2896812[m] = 2896.8[km]$

Now using the following equation of kinematics, for the avarage velocity we have:

$v=\frac{x}{t} \\where \\v=velocity [m/s]\\t = time [s]\\x=distance traveled [m]\\$

therefore:

$t=\frac{x}{v} \\t=\frac{2896812}{15}\\ t=193120.8[s]$

Now we can convert from seconds into days.

$193120.8[s]*\frac{1[hr]}{3600[s]}*\frac{1[day]}{24[hr]}\\ t = 2.2[days]$

Now if the truck has the need to come back, the team will spend double time.

t= 4.4 [days]

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3 years ago

Identify the y-intercept.

Dmitry [639]

Answer:

1 is the y intercept

Explanation:

the y intercept is where the line crosses the y axis

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3 years ago

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Fill up the blank :- Weight is measured as the downward force of __________.

In-s [12.5K]

<span>Weight is measured as the downward force of gravity.</span>

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3 years ago

A snowball starting at rest rolls down a hill and reaches 5 m/s. If the hill is

Lostsunrise [7]

Answer:

The acceleration of the snowball is 0.3125

Explanation:

The initial speed of the snowball up the hill, u = 0

The speed the snowball reaches, v = 5 m/s

The length of the hill, s = 40 m

The equation of motion of the snowball given the above parameters is therefore;

v² = u² + 2·a·s

Where;

a = The acceleration of the snowball

Plugging in the values, we have;

5² = 0² + 2 × a × 40

∴ 2 × 40 × a = 5² = 25

80 × a = 25

a = 25/80 = 5/16

a = The acceleration of the snowball = 5/16 m/s².

The acceleration of the snowball = 5/16 m/s² = 0.3125 m/s² .

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3 years ago

At which point of projectile motion kinetic energy is minimum​

At which point of projectile motion kinetic energy is minimum