Answer:
(a) (18m/s/t₁)m/s²
(b) -12.5m/s²
(c) -20mls²
Explanation:
(a) Let t₁ be the initial time
a = v-u/t
acc = (18m/s/t₁)m/s²
(b) acc = -30m/s/2.4
= -12.5m/s²
(c)The particle was at a speed of 18m/s in the positive x-direction and later after 2.4s ≡Δt, it was at speed of -30m/s in the negative x-direction.
so this imply that the velocity was first v₁ =18m/s and later v₂ = -30m/s.
The average acceleration is then:
Aavg =<u> Δv</u>
Δt
= v₂-v₁/Δt
= -30-18/2.4 = -20mls²
Answer:
W codziennym użytkowaniu i w kinematyce prędkość obiektu to wielkość zmiany jego ... Ten artykuł dotyczy własności ruchomych ciał. ... Ta prędkość po torze kołowym jest nazywana prędkością styczną, ponieważ kierunek ... Przesuń się trzy razy dalej i masz trzy razy większą prędkość styczną.
Explanation:
Answer:
The evidence that the universe is expanding comes with something called the red-shift of light. Light travels to Earth from other galaxies. As the light from that galaxy gets closer to Earth, the distance between Earth and the galaxy increases, which causes the wavelength of that light to get longer. Distant galaxies are getting further away hinting at a point of origin. The composition of all observed matter in this universe points at a common origin point for all matter in the universe.