Those who are going to answer these 3 questions they are gonna be marked as brainlest by me but answer should be correct ( and simple as possible you can make it please )
Answers
Answer:
Thank u for sending questions completely so lets start solving
1.Given
u ( initial velocity) = 0m/s
v(final velocity) = 144km/h
= 144×1000/60×60 = 40 m/s
t (time) = 1 minute =60s
a = v - u /t
a = 40 - 0 /60
a = 2/3 ms ^-2
s = v^2 - u^2/2a
s = (40)^2 - (0)^2/2/3
s = 1600 /2×3/2
s = 1600/3
s = 533.34 m (approx)
2. Given,
u (initial velocity) = 0 (as the car
starts from rest)
acceleration = 2m/s^-2
time = 10 s
v = u + at
v = 0 + 2×10
v = 20ms^-1
s = v^2 - u^2 / 2a
s = (20)^2 - (0)^2 / 2× 2
s = 400/4
s = 100m
3. Given,
u = 0.02km/s = 20m/s
v = 0m/s (as the car comes to rest)
s = 100m
a = - (v^2 - u^2 /2s) ( acceleration will be negative as it is retardation)
a = - ( 0 - 20/2×100)
a = -(-20/ 200)
a = 1/10 ms^-2
t = v- u/a
t = 0 - 20/ 1/10
t = -20 × 10
t = -200 s
t = 3 minutes and 20 seconds.
HOPE IT HELPS
Plz mark as brainalist.
sorry I am just taking the points