3 years ago

Calculate the speed of a dolphin that is observed swimming 75 meters in 5.0 seconds.

Physics

1 answer:

GarryVolchara [31]3 years ago

8 0

Answer:

15 meters/second

Explanation:

You might be interested in

A relief airplane is delivering a food package to a group of people stranded on a very small island. The island is too small for

strojnjashka [21]

speed of the plane is given as

$v = 442 km/h = 122.8 m/s$

height of the plane is

$h = 575 m$

acceleration due to gravity is

$g = 9.80 m/s^2$

part a)

when package is dropped its vertical speed is zero so we can use kinematics to find the time of drop

$\delta y = v_y * t + \frac{1}{2}gt^2$

$575 = 0 + \frac{1}{2}*9.80*t^2$

$t = 10.83 s$

Part b)

Horizontal distance moved by the package is given by

$\delta x = v_x * t$

$\delta x = 122.8 * 10.83$

$\delta x = 1330.3 m$

Part c)

final speed in x direction

$v_x = 122.8 m/s$

final speed in y direction

$v_y = 9.8*10.83 = 106.13 m/s$

so net speed as it hit the ground will be

$v = \sqrt{v_y^2 + v_x^2}$

$v = \sqrt{122.8^2 + 106.13^2}$

$v = 162.3 m/s$

5 0

3 years ago

The solar system is considered what type of system?

Degger [83]

I think the answer is a although I'm not 100% sure. I think it's becuase it's natural and nothing man made has ever intervened with it

7 0

3 years ago

I NEED HELP please answer it

Kaylis [27]

I did chocolate
1- 1:02
2-47 secs
3- 17 secs
Hope I helped ;)

4 0

3 years ago

1.when viable light shines on a black object it get warm because.

Lera25 [3.4K]

Answer:

1. Black absorbs heat and does not bounce the light off. 2. White bounces the light off reducing heat

4 0

3 years ago

Read 2 more answers

According to Coulomb’s Law, the force between two charged objects is related to _____. the distance separating them the mass of

exis [7]

The force between two charges objects is related to separation.

6 0

3 years ago

Read 2 more answers