A bird is flying at an initial velocity of 5m/s. It flaps its wings harder, causing it to
accelerate forward at 2m/s/s. At this rate, how long would it take for the bird to fly a total
of 25m?

Answer:

1=false and 2=1st answer is correct

Explanation:

force(f)=250N

acceleration(a)=5m/sec²

mass(m)=?

now,

f=m.a

f=m

a

m=250

5

m=50kg

i hope so,

The weight of a 75 kg person on Earth is 735 N, The correct option is D.

Acceleration due to gravity is the acceleration that an object experiences due to the gravitational force exerted by a massive body, such as Earth. The acceleration due to gravity on Earth is approximately 9.8 meters per second squared (m/s^2) and is denoted by the symbol "g".

The acceleration due to gravity is a vector quantity, which means that it has both magnitude and direction. The direction of the acceleration due to gravity is always downwards, towards the center of the massive body.

The acceleration due to gravity is a constant value near the surface of the Earth, but it can vary slightly depending on altitude, latitude, and the composition of the Earth's interior. For example, at higher altitudes, the acceleration due to gravity decreases slightly, while at the equator, it is slightly greater than at the poles due to Earth's rotation.

The acceleration due to gravity plays an important role in many physical phenomena, including free fall, projectile motion, and the behavior of fluids in containers.

Here in the Question,

The weight of a 75 kg person on Earth can be calculated using the formula:

weight = mass x acceleration due to gravity

Substituting the given values, we get:

weight = 75 kg x 9.8 m/s^2

weight = 735 N

Therefore, the weight of a 75 kg person on Earth is 735 N, which is option D.

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Answer:

The policeperson will not be able to catch the speeder in 10 seconds

Explanation:

The maximum acceleration of the 2020 Ford police interceptor, a = 4.4 m/s²

The rate at which the speeding car is moving, v = 70 mph (31.3 m/s)

The time after which the policeperson takes off = 1 second

The time, t, at which the policeperson catches the speeding car is given as follows;

s = u·t + 1/2·a·t²

Where;

u = The initial velocity of the Ford police interceptor = 0

∴ s = 0 × t + 1/2·a·t² = 1/2·a·t²

s = 1/2·a·t²

s = v × (t + 1)

Equating both equations, gives;

v × (t + 1) = 1/2·a·t²

Substituting the values, we get;

31.3 × (t + 1) = 1/2 × 4.4 × t²

31.3·t + 31.3 = 2.2·t²

2.2·t² - 31.3·t - 31.3 = 0

By the quadratic formula, we have;

t = (31.3 ± √((-31.3)² - 4×2.2×(-31.3))/(2 × 2.2)

t ≈ -0.938 seconds or t ≈ 15.165 seconds

The policeperson will catch the speeder in approximately 15.165 seconds

Therefore, the policeperson will not be able to catch the speeder in 10 seconds.

Answer:

n physics, the kinetic energy (KE) of an object is the energy that it possesses due to its motion.[1] It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is {\displaystyle {\begin{smallmatrix}{\frac {1}{2}}mv^{2}\end{smallmatrix}}}{\begin{smallmatrix}{\frac {1}{2}}mv^{2}\end{smallmatrix}}. In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.

The standard unit of kinetic energy is the joule, while the imperial unit of kinetic energy is the foot-pound.

Explanation:

Answer:

kinetic energy is the energy that an object posses due to their motions.

Explanation:

eg:When you let go of that ball and let it fall, the potential energy converts into kinetic energy, or the energy associated with motion. There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical.

Answer:

acceleration will be twice as much

Answer:

C. 2m to the right of the rollerblader

Explanation:

The turtle is 2m to the LEFT of the rollerblader, so its the only option not describing the position of the turtle:)

Hope this helps, have a great day;)

Answer:

All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms. ... Therefore, the atomic number of an atom also tells you how many electrons the atom has. This, in turn, determines many of the atom's chemical properties.

The applied force is parallel to the ground, so the net vertical force on the sled is 0. By Newton's second law, this means the normal force and weight of the sled cancel out:

n - w = 0

n = w

n = m g

n = (15.7 kg) (9.80 m/s²)

n = 153.86 N

Answer:

producer

Explanation:

grass is producing

by photosynthesis

Answer: The acceleration due to gravity is the constant pull towards the core of the earth due to gravity on earth. It is abbreviated by the letter g and is equal to -9.81 m/s².

Explanation:

Answer:first of all what is your question and i can give and example which is Use them when you have 2 forces named Fa & FF or Fg & Ff acting in opposite directions on an object and you need to know the resultant of your 2 forces.

Explanation:

i searched it up

Answer:

0.323232....m/s2

Explanation:

acceleration=V/t

32m/s/99s=0.3232m/s2

Answer:

B) He can demonstrate that water can be boiled on a simple kitchen stove.

Explanation:

Took the test edge2020 :)

He can demonstrate that water can be boiled on a simple kitchen stove.

The following information should be considered;

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Explanation:

A compass needle acts as a Magnet

Answer: 40 N

Explanation: Use the formula

F = m a

to solve this.

F = (8 kg) (5 m/s²)

F = 40 kgm/s²

F = 40 N

The given value are:

Acceleration,

Mass,

The force will be:

→ [tex]Force (F) = Mass(m)\times Acceleration (a)[/tex]

By substituting the values, we get

                   [tex]= 5\times 8[/tex]

                   [tex]= 40 \ N[/tex]

Thus the response above is right.

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Answer:

The potential difference between the plates of the capacitor is 300V

Explanation:

Given;

capacitance of the capacitor, C = 5μF = 5 x 10⁻⁶ F

charge of the capacitor, Q = 1500μC = 1500 x 10⁻⁶ C

The potential difference between the plates of the capacitor is given by;

V = Q / C

Where;

V is the  potential difference between the plates

Q is the charge of the capacitor

C is the capacitance

[tex]V = \frac{Q}{C} \\\\V = \frac{1500*10^{-6}}{5*10^{-6}} \\\\V = 300 \ volts[/tex]

Therefore, the potential difference between the plates of the capacitor is 300V

Answer:

The Moon rotating around Earth and the Earth rotating around the Sun

Explanation:

Answer:

the rotation of Earth on its axis

Explanation:

Did it on study island

Answer:mass

Explanation:

Answer:

f = 485.62 N

Explanation:

Since, the bag is moving with some acceleration. Hence, the unbalanced force will be given as:

Unbalanced Force = Horizontal Component Applied Force - Frictional Force

Unbalanced Force = Fx - f

But, from Newtons Second Law of Motion:

Unbalanced Force = ma

comparing the equations:

ma = Fx - f

f = F Cos θ - ma

where,

f = frictional force  = ?

F = Applied force  = 593 N

m = mass of person = 49 kg

a = acceleration = 0.57 m/s²

θ = Angle with horizontal = 30°

Therefore,

f = (593 N)(Cos 30°) - (49 kg)(0.57 m/s²)

f = 513.55 N - 27.93 N

f = 485.62 N

Answer:

0.13m/s

Explanation:

jhghffhjffhjfhjfhjf

Answer:

Speed = 8.79m/s

Explanation:

Given the following data;

Height = 4m

Horizontal distance = 8m

To find the time, we would use the second equation of motion

S = ut + ½at²

We know that acceleration due to gravity is equal to 9.8m/s²

Initial velocity, u = 0

Substituting into the equation, we have;

4 = 0(t) + ½*9.8*t²

4 = 0 + 4.9*t²

4 = 4.9t²

t² = 4/4.9

t² = 0.82

Taking the square root of both sides, we have;

t = 0.91 secs

To find the speed;

Speed = horizontal distance/time

Speed = 8/0.91

Speed = 8.79m/s

Therefore, the pelican's speed is 8.79 meters per seconds.

Answer:

25.0 less force

Explanation:

Answer:

(a) 3.06 s

(b) 45.92 m

(c) 6.12 s

(ch) 1.43 s

Explanation:

Vertical Launch Upwards

In a vertical launch upwards, an object is launched vertically up without taking into consideration any kind of friction with the air.

If vo is the initial speed and g is the acceleration of gravity, the maximum height reached by the object is given by:

[tex]\displaystyle h_m=\frac{v_o^2}{2g}[/tex]

Similarly, the time it needs to reach the maximum height is:

[tex]\displaystyle t_m=\frac{v_o}{g}[/tex]

The object's speed (vf) after time t is:

[tex]v_f=v_o-g.t[/tex]

The baseball is thrown up at vo=30 m/s.

(a) It's required to calculate the time it needs to reach the maximum height:

[tex]\displaystyle t_m=\frac{30}{9.8}=3.06[/tex]

[tex]t_m=3.06~s[/tex]

(b) The maximum height is:

[tex]\displaystyle h_m=\frac{30^2}{2(9.8)}=45.92[/tex]

[tex]h_m=45.92~m[/tex]

(c) The time needed to travel up is the same time required to return to the starting point:

[tex]t_f=2*t_m=2*3.06[/tex]

[tex]t_f=6.12~s[/tex]

(ch) The speed will be vf=16 m/s at a certain time. Using the equation

[tex]v_f=v_o-g.t[/tex]

We solve for t:

[tex]\displaystyle t=\frac{v_f-v_o}{g}[/tex]

[tex]\displaystyle t=\frac{30-16}{9.8}[/tex]

t = 1.43 s