Distance = speed* time
10x10^-3 *u + 10x10^-3 * 2u = 125
0.01u + 0.02u = 125
0.03u = 125
u = 4166.66666.... s
acceleration = (final velocity - initial velocity)/time
(10x10-3 - 0)/4167 = 2.3998 * 10^-6 m s-2
Answer:
if u are reading the answer i think u re safe
Answer:
1a) True 1b) False
Explanation:
The definition of a car's velocity is the change of displacement between time, from here we can see that this is a vector, this means that it has magnitude and direction.
The definition of speed is the change of distance between the unit of time, as we see this magnitude is a scalar since distance is a scalar.
1 a) the car has the same speed, True since the magnitude is a scalar
1 b) the cars have the same speed. False since the magnitude is a vector, even if it has the same module it has different direction
Answer:
The acceleration of the object is 9.3 m/s²
Explanation:
For a straight movement with constant acceleration, this equation for the position applies:
x = x0 + v0 t + 1/2 a t²
where
x = position at time t
x0 = initial position
v0 = initial velocity
a = acceleration
t = time
we have two positions: one at time t = 1 s and one at time t = 2 s. We know that the difference between these positions is 14.0 m. These are the equations we can use to obtain the acceleration:
x₁ = x0 + v0 t + 1/2 a (1 s)²
x₂ = x0 + v0 t + 1/2 a (2 s)²
x₂ - x₁ = 14 m
we know that the object starts from rest, so v0 = 0
substracting both equations of position we will get:
x₂ - x₁ = 14
x0 + v0 t + 1/2 a (2 s)² - (x0 + v0 t + 1/2 a (1 s)²) = 14 m
x0 + v0 t + 2 a s² - x0 -v0 t - 1/2 a s² = 14 m
2 a s² - 1/2 a s² = 14 m
3/2 a s² = 14 m
a = 14 m / (3/2 s²) = <u>9.3 m/s² </u>
<span>Brownian
motion is the random movement of colloidal particles suspended in a fluid. It is
caused by random collisions of the molecules in the fluid medium. The particles
in the solution or colloids are in constant random movement. A colloid has
properties boundary to a homogenous and heterogeneous mixture. However in
Brownian movement, the larger the size of a particle, the lesser its motion and
the smaller the size of the particle, the higher is motion. Colloids in general
have larger particle size and therefore it Brownian motion is sluggish. The statement
is false.</span>
