3 years ago

Why does physics involve math?

Physics

1 answer:

Scrat [10]3 years ago

3 0

Physics involves math because calculations have to be made and u use math to make calculations

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Select the correct answer.

Bumek [7]

Answer:

B. 2 Hours

Explanation:

If you are going 45 miles per hour, you will travel 45 miles in 1 hour. It will take you 2 hours to travel 90 miles at a speed of 45 miles per hour.

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3 years ago

Read 2 more answers

A man 6 feet tall walks at a rate of 5 feet per second away from a light that is 15 feet above the ground. When he is 10 feet fr

harina [27]

Answer:

$\frac{25}{3}ft/s$

Explanation:

Height of man= 6ft

Height of light=1 5ft

Let BC=x and CD=y

BD=x+y

Triangle ABD and ECD are similar

When two triangles are similar then the ratio of their corresponding sides are equal

$\frac{AB}{EC}=\frac{BD}{CD}$

$\frac{15}{6}=\frac{x+y}{y}$

$\frac{5}{2}=\frac{x+y}{y}$

$5y=2x+2y$

$5y-2y=2x$

$3y=2x$

Differentiate w.r.t t

$2\frac{dx}{dt}=3\frac{dy}{dt}$

We have $\frac{dx}{dt}=5ft/s$

Substitute the value then we get

$2\times 5=3\frac{dy}{dt}$

$\frac{dy}{dt}=\frac{2\times 5}{3}=10/3ft/s$

Rate at which the tip of shadow is moving= $\frac{dx}{dt}+\frac{dy}{dt}$

Rate at which the tip of shadow is moving= $5+\frac{10}{3}=\frac{15+10}{3}ft/s$

Rate at which the tip of shadow is moving= $\frac{25}{3}ft/s$

5 0

3 years ago

Two balls of equal mass at the bottom of an incline are rolled upward without slipping at the same initial velocity. one ball is

german

The appropriate response would be the hollow ball.The purpose for it has more kinetic energy at the last (2/3 as opposed to 2/5) so it will have more potential energy (more height) at the best. Pondering it, more inertia implies its less impervious to change meaning the hollow ball with more inertia wont need to stop as fast.

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4 years ago

When pressing the accelerator on a car, the _______ energy of the fuel is transformed into the ______ energy that makes the car

Oksanka [162]

- Chemical
- Kinetic

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3 years ago

A telephone wire has a current 20A flowing through it . How long does it take for a charge of 15 C to pass through the wire?

Sauron [17]

Charge = Current/time
Q = It
t = Q/I = 15/20 = 0.75 s

7 0

4 years ago