Answer:
-120000 W
Explanation:
Power = change in energy / time
P = ΔE / t
P = (½ mv₂² − ½ mv₁²) / t
P = m (v₂² − v₁²) / (2t)
Given m = 1.5 t = 1500 kg, v₂ = 10 m/s, v₁ = 30 m/s, and t = 5 s:
P = (1500 kg) ((10 m/s)² − (30 m/s)²) / (2 × 5 s)
P = -120000 W
Speed is the distance traveled by an object where as, velocity is distance traveled by an object per unit time in a particular direction. Speed is a scalar quantity where as velocity is a vector quantity.
Answer:
5 m
35 m
Explanation:
From the formula
s = ut + 1 /2 g t²
u = 0 ; t = 1.
s = 1 / 2 x 10 x 1 = 5 m
In first second distance traveled is 5 m .
Time to travel 80 m is t
80 = 0 + .5 x 10 t²
t = 4s
In last one second
s = u +
= 0 + (2 x4 -1 )x 10 /2 = 35 m .
Answer:
We can do a number of things for fun hobby ike -
- play musical instuments
- sing or dance
- solve a puzzle
- do brainly ;)
- Do a drawing or painting
etc
I love to do in my free time :
- Solve puzzles
- Make a poem
- play musical instruments
- do brainly ;)
- play chess
Etc.
Answer:
The magnitude is 63 kg m²/s, and the direction is -k.
Explanation:
Plug the values into the equation:
L = m v×r
L = (3.0 kg) (<5 i + 3j> m/s × <2i − 3j> m)
Take the cross product. The cross product of two dimensional vectors is:
<v₁ i + v₂ j> × <r₁ i + r₂ j> = <(v₁ r₂ − v₂ r₁) k>
Therefore:
L = (3.0 kg) <((5)(-3) − (3)(2)) k m²/s>
L = (3.0 kg) <-21 k m²/s>
Multiply:
L = <-63 k kg m²/s>
The magnitude is 63 kg m²/s, and the direction is -k.