All categories

3 years ago

A man walks 7 km, east in 2 hours and 2 km in 1 hour in the same direction. a) what is

Physics

1 answer:

Rzqust [24]3 years ago

8 0

Explanation:

Average speed = distance / time

|v| = (7 km + 2 km) / (2 hr + 1 hr)

|v| = 3 km/hr

Average velocity = displacement / time

v = (7 km east + 2 km east) / (2 hr + 1 hr)

v = 3 km/hr east

You might be interested in

The acceleration of gravity on the surface of Earth is 9.8 m/s / s . On the Moon the acceleration of gravity is 1/6 of this valu

qwelly [4]

Answer:

60(9.8 / 6) = 98 N

Explanation:

4 0

3 years ago

Cognitive psychology deals with ____.

Elanso [62]

Answer:

Explanation:

Because the main focus of cognitive psychology is on the metal processes that affect behavior

3 0

2 years ago

1. When two atoms of the same nonmetal react, they often form a(an)

kkurt [141]

When two atoms of the same nonmetal react,they form what we know today as a diatomic molecule.

Please mark brainliest. :)

7 0

3 years ago

3. What is the relationship among wave speed, wavelength, and frequency?

Rus_ich [418]

Answer:

Wave speed is related to both wavelength and wave frequency. Wavelength is the distance between two corresponding points on adjacent waves. Wave frequency is the number of waves that pass a fixed point in a given amount of time. This equation shows how the three factors are related:

Speed = Wavelength x Wave Frequency

Explanation:

4 0

3 years ago

The moment of inertia for a 5500 kg solid disc is 12100 kg-m^2. Find the radius of the disc? (a) 2.111 m (b) 2.579 m (c) 1.679

Soloha48 [4]

Answer:

The radius of the disc is 2.098 m.

(e) is correct option.

Explanation:

Given that,

Moment of inertia I = 12100 kg-m²

Mass of disc m = 5500 kg

Moment of inertia :

The moment of inertia is equal to the product of the mass and square of the radius.

The moment of inertia of the disc is given by

$I=\dfrac{mr^2}{2}$

Where, m = mass of disc

r = radius of the disc

Put the value into the formula

$12100=\dfrac{5500\times r^2}{2}$

$r=\sqrt{\dfrac{12100\times2}{5500}}$

$r= 2.098\ m$

Hence, The radius of the disc is 2.098 m.

8 0

3 years ago