B
Scientific laws are facts that describe observed reoccurring natural events.
Answer: You use friction when your bike stops.
Explanation: Force and friction affect our daily lives in numerous amounts of ways. For instance, when a football is kicked, it moves faster later after some time its force decreases due to friction. A common example of friciton is when a bike stops. When the brakes are applied the friction on the pads cause the bike to stop.
Answer:
Position of motorist = 33.8 m
position of police officer = 16.9 m
Explanation:
velocity of motorist, v = 13 m/s
initial velocity of police officer, u = 0
Acceleration of police officer, a = 5 m/s^2
let after time t, the velocity of police officer is equal to the velocity of motorist.
v = u + at
13 = 0 + 5 t
t = 2.6 second
Position of motorist after 2.6 second = v x t = 13 x 2.6 = 33.8 m
Position of police officer after t = 2.6 s
s = ut + 0.5 at^2
s = 0 + 0.5 x 5 x 2.6 x 2.6 = 16.9 m
Skin is a huge on. there is also tears and mucous membranes
The equation that would allow us to calculate for the acceleration given the distance is written below,
a = (Vf² - Vo²) / 2d
where a is the acceleration, Vf is the final velocity, Vo is the initial velocity, and d is distance.
Substituting the known values,
a = ((84 ft/s)² - (72 ft/s)²) / 2(180 ft) = 5.2 ft/s²
Then, the equation that would relate the initial velocity, distance, acceleration and time is calculated through the equation,
d = Vot + 0.5at²
Substituting the known values,
180 = 72(t) + 0.5(5.2)(t²)
The value of t from the equation is 2.3 s
<em>ANSWER: 2.3 s</em>