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3 years ago

No force is necessary to

Physics

2 answers:

Misha Larkins [42]3 years ago

5 0

Keep moving in a straight line at constant speed.

Yuliya22 [10]3 years ago

4 0

Keep an object moving the way it is already moving in

You might be interested in

Find initial velocity and time in air

kkurt [141]

Answer:

The answer to your question is: v = 121.46 m/s

Explanation:

Data

h = 30 m

vo = ?

dx = 300 m

Formula

t = $\sqrt{\frac{2h}{g}}$

speed = distance / time

Process

$t = \sqrt{\frac{2(30)}{9.81}} \\$

t= 2.47 s

speed = 300 / 2.47

speed = v = 121.46 m/s

6 0

3 years ago

If a giant molecular cloud is 59 pc in diameter and a shock wave sweeps through at 18 km/s, how long will it take the shock wave

11Alexandr11 [23.1K]

The time it will take for the shock wave in years to sweep through the cloud is 3.2075 x 10⁷ years.

<h3>What is Velocity?</h3>

Velocity is the directional speed of a moving object as an indicator of its rate of change in location as perceived from a certain frame of reference and measured by a specific time standard.

As it is known that one parsec is equal to 3.086×10¹⁶ meters. Therefore, the diameter of the molecular cloud is,

Diameter of the molecule = 59 pc

= 59 × 3.086×10¹⁶ meters

= 1.82074 × 10¹⁸ meters

= 1.82074 × 10¹⁵ kilometres

Given that the shock wave sweeps through at 18 km/s. And as it is known that velocity is the ratio of distance and time. Therefore, the time it will take for the shock wave to sweep through the molecule cloud is,

Velocity = Distance / Time

18 km/s = 1.82074 × 10¹⁵ km / Time

Time = 1.82074 × 10¹⁵ km / 18 km/s

t = 1.01152x10¹⁴ seconds

Since one year is equal to 31,536,000 seconds, therefore, the time in years is equal to,

t = 1.01152x10¹⁵ seconds / 31,536,000 seconds per year

t = 32,075,088.79 years

t = 3.2075 x 10⁷ years

Hence, the time it will take for the shock wave in years to sweep through the cloud is 3.2075 x 10⁷ years.

Learn more about Velocity here:

brainly.com/question/18084516

#SPJ4

7 0

2 years ago

what is the voltage in mv across an 5.5 nm thick membrane if the electric field strength across it is 5.75 mv/m? you may assume

inn [45]

Answer:

V = 31.62 m V

Explanation:

Given,

Voltage across thick membrane = ?

Thickness of the membrane, d = 5.5 n m

Electric field = 5.75 M V/m

we know

$E = \dfrac{V}{d}$

V = E d

V = 5.75 x 10⁶ x 5.5 x 10⁻⁹

V = 31.62 x 10⁻³ V

V = 31.62 m V

Hence, The Voltage across the membrane is equal to 31.62 m V.

3 0

4 years ago

How much force is needed to stop a 80 kg football player if he decelerates at 5m/s?

cricket20 [7]

Use Newton's 2nd law of motion.
Here it is:

   Force = (mass) x (acceleration)

   = (80 kg) x (-5 m/s²)

   =    -400 Newtons .

I called the acceleration negative because the player is slowing down.

The force comes out negative because it's in the direction opposite to
his motion.

4 0

4 years ago

1. Nyatakan prinsip Bernoulli.

nignag [31]

Answer:

prinsip bernoulli

Explanation:

Prinsip Bernoulli adalah sebuah istilah di dalam mekanika fluida yang menyatakan bahwa pada suatu aliran fluida, peningkatan pada kecepatan fluida akan menimbulkan penurunan tekanan pada aliran tersebut. Prinsip ini sebenarnya merupakan penyederhanaan dari Persamaan Bernoulli yang menyatakan bahwa jumlah energi pada suatu titik di dalam suatu aliran tertutup sama besarnya dengan jumlah energi di titik lain pada jalur aliran yang sama. Prinsip ini diambil dari nama ilmuwan Belanda/Swiss yang bernama Daniel Bernoulli.

6 0

3 years ago