Ask question

Ask question

All categories

emmainna [20.7K]

3 years ago

9

A car follows a curved highway from point C to D, covering a distance of 100 kilometers and displacement to the east of 40 kilom

eters to the south in 2 hours. What is speed and velocity of the car in kilometers per hour ?
Speed:______km/h

Velocity:______km/h _______

1 answer:

drek231 [11]3 years ago

8 0

Answer:

40 speed and km/h

Explanation:

Velocity:40 km/h 2

You might be interested in

The speed of an object and the direction in which it moves constitute a vector quantity known as the velocity. an ostrich is run

Orlov [11]

Velocity of an object is its rate of change of the object's position per interval of time. Velocity is a vector quantity which means that it consists of a magnitude and a direction. Magnitude is represented by the speed and the direction is represented by the angle. To determine the velocity components, we use trigonometric functions to determine the angle of the components. For the north component we, use the sine function while, for the west component, we use the cosine function. We calculate as follows:
north velocity component = (16.8 m/s) (sin 54°) = 16.4 m/s
<span>west velocity component = (16.8 m/s) (cos 54°) = 3.49 m/s</span>

6 0

4 years ago

Help! <br><br><br>I'm not sure my answer is correct.<br><br><br>Problem is attached!

kaheart [24]

Let G be xN

$\\ \sf\longmapsto x-20=30$

$\\ \sf\longmapsto x=30+20$

$\\ \sf\longmapsto x=50N$

Option B

3 0

3 years ago

Read 2 more answers

If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be A. equal to the weigh

Gala2k [10]

the correct answer is c

4 0

3 years ago

describe the following wave characteristics associated with Transverse and longitudinal waves-amplitude, wavelength, and frequen

sasho [114]

frequency is how many times a sec the thing vibrates

amp is the size of the vibration

wavelength is distance peak to peak for example

8 0

3 years ago

Emily holds a banana of mass m over the edge of a bridge of height h. She drops the banana and it falls to the river below. Use

bearhunter [10]

Answer:

The mass of the banana is m and it is at height h.

Applying the Law of Conservation of Energy

Total Energy before fall = Total Energy after fall

$E_{i}$ = $E_{f}$

Here, total energy is the sum of kinetic energy and potential energy

$K.E_{i}$ + $P.E_{i}$ = $K.E_{f}$ + $P.E_{f}$ (a)

When banana is at height h, it has

$K.E_{i}$ = 0 and $P.E_{i}$ = mgh

and when it reaches the river, it has

$K.E_{f}$ = 1/2m $v^{2}$ and $P.E_{f}$ = 0

Putting the values in equation (a)

0 + mgh = 1/2m $v^{2}$ + 0

mgh = 1/2m $v^{2}$

<em>cutting 'm' from both sides</em>

<em> </em>gh = 1/2 $v^{2}$

v = $\sqrt{2gh}$

Hence, the velocity of banana before hitting the water is

v = $\sqrt{2gh}$

5 0

3 years ago