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3 years ago

Anybody know these ?

Physics

1 answer:

pashok25 [27]3 years ago

5 0

Answer:

1. a) 72 N.

2. a) 2 m/s².

Explanation:

Given the following data;

1. Mass = 90kg

Acceleration = 0.8 m/s²

To find the force;

Force = mass * acceleration

Force = 90 * 0.8

Force = 72 Newton.

2. Mass = 50kg

Force = 100N

To find the magnitude of acceleration;

Acceleration = force/mass

Acceleration = 100/50

Acceleration = 2 m/s²

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A plane travels at a speed of 205mph in still air. Flying with a tailwind, the plane is clocked over a distance of 1000 miles. F

vaieri [72.5K]

While plane is moving under tailwind condition it took time "t"

so here we will have

$t = \frac{d}{v_{net}}$

here net speed of the plane will be given as

$v_{net} = v + v_w$

$t = \frac{1000}{205 + v_w}$

similarly when it moves under the condition of headwind its net speed is given as

$v_{net} = v - v_w$

now time taken to cover the distance is 2 hours more

$t + 2 = \frac{1000}{205 - v_w}$

now solving two equations

$\frac{1000}{205 + v_w} + 2 = \frac{1000}{205 - v_w}$

solving above for v_w we got

$v_w = 40.4 mph$

6 0

3 years ago

Which law explains how light changes as temperature increases?

gayaneshka [121]

Wein’s Law, search it up if you need more info

7 0

3 years ago

Jupiter's gravity is about 2.3 times stronger than Earth's gravity. Calculate the

AlexFokin [52]

Answer:

Explanation:

There is no change in mass. Therefore, mass = 70 k g

Weight on Jupiter ≈ 1578 N

4 0

3 years ago

I really need help i’m in a really big rush

kompoz [17]

1. The speed is at a constant rate same with the acceleration and velocity

2. When there getting close to the top there speed, acceleration, and velocity all start to decrease

3. The speed and acceleration and velocity all on the way down drastically increase number

hope I helped

3 0

3 years ago

Alvin paddled for 44 hours with a 33-km/h current to reach a campsite. The return trip against the same current took 77 hours.

sveta [45]

Answer:

121km/h

Explanation:

Let speed of boat=xkm/h

Speed of water flow=33 km/h

Speed upstream=(x-33)km/h

Speed downstream=(x+33)km/h

Time=44 hrs