All categories

3 years ago

describe how the students position in relation to a reference point and how the boys body could move as he walks to class

Physics

1 answer:

BARSIC [14]3 years ago

8 0

His nerves joints and bones control his movement

You might be interested in

Why does polarity allow water to be such a good solvent

Alexeev081 [22]

Water is capable of dissolving a variety of different substances, and is attracted to many other different molecules

7 0

3 years ago

A Porsche challenges a Honda to a 200-m race.Because the Porsche's acceleration of 3.5 m/s2 is larger than the Honda's 3.0 m/s2,

Blizzard [7]

Answer:

Honda won by 0.14 s

Explanation:

We are given that

Distance =S=200 m

Initial velocity of Honda=u=0m/s

Initial velocity of Porsche=u'=0m/s

Acceleration of Honda= $3.0m/s^2$

Acceleration of Porsche's= $3.5m/s^2$

Time taken by Honda to start=1 s

$s=ut+\frac{1}{2}at^2$

Substitute the values

$200=0(t)+\frac{1}{2}(3)t^2$

$200=\frac{3}{2}t^2$

$t^2=\frac{200\times 2}{3}=\frac{400}{3}$

$t=\sqrt{\frac{400}{3}}=11.55s$

Time taken by Honda=11.55 s

Now, time taken by Porsche

$200=\frac{1}{2}(3.5)t^2$

$t^2=\frac{200\times 2}{3.5}$

$t=\sqrt{\frac{400}{3.5}}=10.69 s$

Total time taken by Porsche=10.69+1=11.69 s

Because it start 1 s late

Time taken by Honda is less than Porsche .Therefore, Honda won and

Time =11.69-11.55=0.14 s

Honda won by 0.14 s

3 0

3 years ago

A 2.0 kg cart has a momentum of 10.0 kg m/s. What is its velocity?

Svetach [21]

Answer:

$\boxed {\boxed {\sf C. \ 5.0 \ m/s}}$

Explanation:

Momentum is the product of mass and velocity. The formula is:

$p=mv$

The mass of the cart is 2.0 kilograms. The momentum is 10.0 kg m/s. The velocity is unknown.

$m= 2.0 \ kg \\p= 10.0 \ kg \ m/s$

Substitute the values into the formula.

$10.0 \ kg \ m/s= (2.0 \ kg ) v$

We want to solve for the velocity (v). Therefore we must isolate the variable. It is being multiplied and the inverse of multiplication is division. Divide both sides of the equation by 2.0 kg.

$\frac { 10.0 \ kg \ m/s}{2.0 \ kg}=\frac{(2.0 \ kg )v}{2.0 \ kg}$

The kilograms will cancel each other out.

$\frac { 10.0 \ m/s}{2.0}=v$

$5.0 \ m/s=v$

The velocity is <u>5 meters per second.</u>

3 0

3 years ago

If you were creating a lamp by hand what type of material would you chose for the wiring and what material would you chose to co

anzhelika [568]

Copper because it contains alot of electricity

6 0

4 years ago

The Burj Khalifa in Dubai is the world's tallest building. The structure is 828 m (2,716.5 feet) and has more than 160 stories.

Elena L [17]

Answer:

h = 599.5 m

Explanation:

Given,

height of structure = 828 m

weight of the tourist = 184 lb

= 184 x 0.45359 = 83.43 Kg

Potential energy = 187000 J

PE = m gd

$d = \frac{PE}{mg}$

$d = \frac{187000}{83.43\times 9.81}$

h = 228.5 m

Height of the room above the ground.

h = 828 - 228.5

h = 599.5 m

Height of the floor above ground is equal to 599.5 m.

4 0

4 years ago