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2 years ago

3. If I run 150m in 30 seconds, what speed will I have been running at?

Physics

1 answer:

Radda [10]2 years ago

7 0

Answer:

speed = distance/time

Explanation:

speed = 150/30

speed =5m/s

you were running fast .....5m/s is a good speed

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What is Newton's law of universal gravitation?

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3 years ago

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What is biodiversity

Sliva [168]

Answer:

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Explanation:

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2 years ago

"the number of transistors per square inch on an integrated chip doubles every 18 months." this observation is known as ________

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3 years ago

An object with a mass of 49.9 pounds is moving with a uniform velocity of 54.4 miles per hour. Calculate the kinetic energy of t

Bumek [7]

Answer:

6698.03 J

Explanation:

Kinetic Energy: This is a form of mechanical energy that is due to a body in motion. The S.I unit of Kinetic Energy is Joules (J).

The formula for kinetic energy is given as

Ek = 1/2mv².......................... Equation 1

Where Ek = kinetic Energy, m = mass of the object, v = velocity of the object.

Given: m = 49.9 pounds, v = 54.4 miles per hours.

Firstly, we convert pounds to kilogram.

If 1 pounds = 0.454 kg,

Then, 49.9 pounds = (0.454×49.9) kg = 22.655 kg.

Secondly, we convert miles per hours to meters per seconds.

If 1 miles per hours = 0.447 meter per seconds,

Then, 54.4 miles per hours = (0.447×54.4) = 24.3168 meters per seconds.

Substitute the value of m and v into equation 1

Ek = 1/2(22.655)(24.3168)²

Ek = 6698.03 J.

Thus the Kinetic energy of the object = 6698.03 J

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2 years ago

You have just landed your first job as a structural engineer and you have been asked to design a regional airport for small plan

lidiya [134]

Answer: $197.40\ m$

Explanation:

Given

final velocity at takeoff $v=28.1\ m/s$

Acceleration of the plane can be $a=2\ m/s^2$

Initial velocity is zero for the plane i.e. $u=0$

Using the equation of motion

$\Rightarrow v^2-u^2=2as\quad [\text{s=displacement}]\\\text{Insert the values}\\\Rightarrow (28.1)^2-0=2\times 2\times s\\\\\Rightarrow s=\dfrac{789.61}{4}\\\\\Rightarrow s=197.40\ m$

Thu,s the minimum length must be $197.40\ m$

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2 years ago