Question

Can one calculate the speed at which the car is traveling by only measuring the angle of the streaks from the vertical axis?

Answer #1

No. By only measuring the angle of the straks from the vertical axis, you cannot determine the speed of the car.

Consider the motion of a car in an inclined plane. Suppose theta is the angle of the slope.

In the case when the slope is frictionless, the acceleration of the car towards the down side of the slope is given by -

a = g*sin theta

suppose the car starts from rest, then its speed after time t can be known using the expression -

v = u + a*t

put u = 0

so, v = (g*sin theta)*t

so the second variable we should have time t, for knowing the speed of the car.

Therefore, by only knowing the slope theta, we cannot determine the speed of the car.

A 1500kg car traveling east with speed 25 m/s collides and
sticks to another car traveling north. The combined wreck skids to
a stop. The skid marks are 13m long and make an angle 23° north of
east. Determine the mass and speed of the northbound car. You will
need to look up the appropriate coefficient of friction. Cite
sources.

Two cars traveling with the same speed move directly away from
one another. One car sounds a horn whose frequency is 422 Hz and a
person in the other car hears a frequency of 385 Hz. What is the
speed of the cars?

Two cars traveling with the same speed move directly away from
one another. One car sounds a horn whose frequency is 436 HzHz and
a person in the other car hears a frequency of 390 HzHz.
Part A
What is the speed of the cars?
the answer is not 20.23

4) Consider a car traveling with speed around a curve of
radius r . a) Derive an equation that best expresses the angle ()
at which a road should be banked so that no friction is required.
b) If the speed signpost says 42 mile/h, and the angle of the bank
is 18°, what is the radius (r) of the curve. (2 points)
You must show how tan is derived mathematically.

A car is traveling at a constant speed of 45.0 m/s passes a
trooper on a motorcycle hidden behind a billboard. One second after
the speeding car passes the billboard, the trooper sets out from
the billboard at catch the car, accelerating at a constant rate of
3.00 m/s2. solve this example using excel. from the
intersection of two curves, read the time at which the trooper
overtakes the car.

A car of mass 1200kg traveling northward at 17m/s collides in an
intersection with a 1600kg car traveling westward at 12m/s. (a)
Assuming that the two cars remain attached to each-other, find the
velocity of the wreck immediately after the collision. (b)
Calculate the speed of the wreck and the angle at which it is
moving with respect to due North. (c) Calculate the difference
between the final kinetic energy and the total initial kinetic
energy.

A 2000-kg car approaches an intersection traveling north
(y-direction) at 12.0 m/s. A 2400-kg car approaches the same
intersection traveling east (x-direction) at 10.0 m/s. The two cars
collide at the intersection and lock together. Ignoring any
external forces that act on the cars during the collision, what is
the speed of the cars immediately after the collision? At what
angle (relative to the x-axis) do the cars travel immediately after
the collision?
At what angle from the x-axis does...

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a girl with a ball-on-a-string stands out of the sunroof of a
car. She holds one end of the string and lets the ball hang freely.
The car is traveling around a 40m radius curve on a horizontal
track at a constant speed of 10m/s. Due to the car's turn the ball
makes an angle theta with respect to the vertical direction as
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You are in a car (car A) traveling at a constant speed of 72 mph
(miles per hour) when another car (car B) 25 meters ahead of your
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of your car (A).
a) For both cars, sketch acceleration- and velocity-versus-time
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