Answer:
point A N = 11172 N
, point B N = 13486 N and point C N = 14801 N
Explanation:
Let's use Newton's second law on the Y axis, where the car is in equilibrium
a) Horizontal and flat road
Point A
N -w = 0
N = W = mg
N = 1140 9.18
N = 11172 N
b) Horizontal and curved road
In this case, when applying Newton's second law, we have centripetal acceleration, due to the curve
N -W = m a
a = v² / R
N = mg + m v² / R
N = m (g + v² / R)
Point B
Rb = 160 m
We reduce the speed to SI units
V = 71.8 km / h (1000m / 1km) (1h / 3600s) = 19.95 m / s
N = 1140 (9.8 + 19.95²/160)
N = 1140 11.83
N = 13486 N
B point
Rb = 125 m
N = 1140 (9.8 + 19.95²/125)
N = 1140 (12.98)
N = 14801 N
the curve is assumed 90º
Answer:
A. 20 m/s north
Explanation:
The velocity of the car can be calculated as:
where
d is the displacement
t is the time interval
Taking north as positive direction, the initial position of the car is
(south)
while the final position is
(north)
So, the displacement is
(north)
The time interval for the motion is
t = 15 s
So, the velocity of the car is
(north)
Evaporation - Heating
Condensation - Cooling
Freezing - Cooling
Melting - Heating
Sublimation - Heating
Deposition - Cooling
For the speed of an object you need to know how far it is travelling in a given time. Typically you do this by measuring the time it takes for the object to travel a set distance.
<span>For the velocity of an object you also need to know the direction the object is travelling in.
Brainiest answer?</span>
<span>Static discharge differs from electric current because static discharge is described by C. lasting for only a fraction of a second.
This is a very short period of time, and electric current lasts longer than a static discharge does.
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