All categories

3 years ago

A teacher lifted a 10 N box and placed it down. Did she do any work? Explain your answer using math

Physics

1 answer:

Stells [14]3 years ago

8 0

Answer:

i think it is 45 kilograms not really sure?

Explanation:it might be wrong but i think it is right

You might be interested in

A large, heavy cargo container is taken from the surface of the Earth and

Likurg_2 [28]

Answer:

Explanation:

A different weight

3 0

3 years ago

Motion is...

Natalka [10]

A chain position over a certain amount of time

7 0

4 years ago

Determine the stopping distances for a car with an initial speed of 88 km/h and human reaction time of 2.0 s for the following a

seropon [69]

Explanation:

Given that,

Initial speed of the car, u = 88 km/h = 24.44 m/s

Reaction time, t = 2 s

Distance covered during this time, $d=24.44\times 2=48.88\ m$

(a) Acceleration, $a=-4\ m/s^2$

We need to find the stopping distance, v = 0. It can be calculated using the third equation of motion as :

$s=\dfrac{v^2-u^2}{2a}$

$s=\dfrac{-(24.44)^2}{2\times -4}$

s = 74.66 meters

s = 74.66 + 48.88 = 123.54 meters

(b) Acceleration, $a=-8\ m/s^2$

$s=\dfrac{v^2-u^2}{2a}$

$s=\dfrac{-(24.44)^2}{2\times -8}$

s = 37.33 meters

s = 37.33 + 48.88 = 86.21 meters

Hence, this is the required solution.

4 0

4 years ago

April and Alex are saving money to buy new phones. Each friend starts with some money and saves a specific amount each week.

qwelly [4]

First thing to note is that we are on week 0, when they start saving:

The equation for Alex is:

y=20x + 125

Know that we are on week 0, and x is our weeks, that makes our equation:

y=20(0) + 125

Which means it's really:

y=125

That means that the first one is E. 125

For the second, it shows our week 0, which is at 100.

That means that the second one is I. 100

Hope this helps!

5 0

4 years ago

Read 2 more answers

An ideal parallel plate capacitor with a cross-sectional area of 0.4 cm2 contains a dielectric with a dielectric constant of 4 a

Mrrafil [7]

Answer: $283.2\times 10^{-9}\ nC$

Explanation:

Given

Cross-sectional area $A=0.4\ cm^2$

Dielectric constant $k=4$

Dielectric strength $E=2\times 10^8\ V/m$

Distance between capacitors $d=5\ mm$

Maximum charge that can be stored before dielectric breakdown is given by

$\Rightarrow Q=CV\\\\\Rightarrow Q=\dfrac{k\epsilon_oA}{d}\cdot (Ed)\quad\quad [V=E\cdot d]\\\\\Rightarrow Q=k\epsilon_oAE\\\\\Rightarrow Q=4\times 8.85\times 10^{-12}\times 0.4\times 10^{-4}\times 2\times 10^8\\\\\Rightarrow Q=28.32\times 10^{-8}\\\\\Rightarrow Q=283.2\times 10^{-9}\ nC$

4 0

3 years ago

Read 2 more answers