Explanation:
initial velocity= 80km/hr = 22.22 m/s
distance= 40m
Final velocity= 0m/s ( as it needs to be stopped)
<u>Using </u><u>third </u><u>equation </u><u>of </u><u>motion</u><u>,</u>
=> 2as = v² - u²
=> 2a * 40m = 0² - (22.22 m/s)²
=> a = - 493.72/80 m/s²
=> a = - 6.17m/s²
<u>Using </u><u>first </u><u>equation </u><u>of </u><u>motion</u><u>,</u>
=> a = v - u /t
=> -6.17 = 0-22.22/t
=> t = -22.22/-6.17 s
=> t ≈ 3.7 s = stopping time
Answer:
Radiant energy
Explanation:
Got it from the internet... I'm not smart
Answer:
true, there are certain forms of bacteria in water that can cause permanent brain damage (although its rare) so further contamination of water can lead to higher chances of contracting serious illnesses caused by such bacteria.
Answer:
The force is increased by a factor of 96. (F1 = 96F)
Explanation:
Let the first charge be Q1
Let the second charge be Q2
Let the distance between their centers be r
The electrostatic force, F, between them is:
F = (k*Q1*Q2) / r²
If the first charge is doubled = 2Q1
If the second charge is tripled = 3Q2
The separation between their centers is reduced to ¼ = ¼r
The force between them becomes:
F1 = (k* 2Q1 * 3Q2) / (¼r)²
F1 = (6 * k * Q1 * Q2) / (r²/16)
F1 = 96(k * Q1 * Q2) /r²
F1 = 96F
The force is increased by a factor of 96.
Answer:
Displacement and Velocity