3 years ago

When talking about velocity,what is significant about the sign (+ or -)?

Physics

1 answer:

Umnica [9.8K]3 years ago

5 0

Answer:

오늘(-)중앙일보수고하셨습니다오늘하루도 화이팅입니다오늘 하루도 화이팅

You might be interested in

A juggler throws a bowling pin straight up with an initial speed of 9.20m/s. How much time elapses before the pin reaches the ju

timama [110]

$v=v(0)+at$

$9.20=0+(9.81*t)$ $|$ 9.81 because the fall is due to gravity.

$t= \frac{9.20}{9.81}$

$t=0.94seconds$

8 0

3 years ago

Read 2 more answers

A hammer falls from a construction worker's hand 30m above the ground at the same time that a filled soft drink can is projected

drek231 [11]

For harmer:-

initial velocity=u=0m/s

Acceleration due to gravity=10m/s^2

Now

$\\ \sf\longmapsto s=ut+\dfrac{1}{2}gt^2$

$\\ \sf\longmapsto s=0t+\dfrac{1}{2}(10)t^2$

$\\ \sf\longmapsto s=5t^2\dots(1)$

For soft drink:-

u=24m/s

$\\ \sf\longmapsto 30-s=(24)t+\dfrac{1}{2}(10)t^2$

Using eq(1)

$\\ \sf\longmapsto 30-5t^2=24t-5t^2$

$\\ \sf\longmapsto 24t=30$

$\\ \sf\longmapsto t=\dfrac{30}{24}$

$\\ \sf\longmapsto t=1.2s$

After 1.2s they will meet.

Now

putting t in eq(1)

$\\ \sf\longmapsto s=5t^2=5(1.2)^2=5(1.44)=7.2m$

At the height of 7.2m they will meet

3 0

3 years ago

A maglev train can “float” because magnets in the bottom of the train and on the guideway...

miss Akunina [59]

C. Have like poles that repel each other

4 0

3 years ago

How is the way that allows us to listen to an AM/FM Radio in our car is different from the wave that allows us to listen to mu

SVETLANKA909090 [29]

Answer:

Well AM/Fm is digitally using soundwaves for cars through signal, which we cant hear without one (radio). Concerts are in real life and use wavelegnths that we hear because it bounces off overytihing.

Explanation:

4 0

3 years ago

in which activity is no work done? A. pushing a shopping cart B. climbing stairs C. holding a brick D. lifting a book

Vesnalui [34]

Your answer is c holding a brick doesn't contain movement, but energy to grip on it.

hoped it helped!!!

3 0

4 years ago

When talking about velocity,what is significant about the sign (+ or -)?​

When talking about velocity,what is significant about the sign (+ or -)?