Initial speed of the car (u) = 15 m/s
Final speed of the car (v) = 0 m/s (Car comes to a complete stop after driver applies the brake)
Distance travelled by the car before it comes to halt (s) = 63 m
By using equation of motion, we get:

Acceleration of the car (a) = -1.78 m/s²
Magnitude of the car's acceleration (|a|) = 1.78 m/s²
A is the correct answer, pls give brainliest
<span>I think the correct answer from the choices listed above is the second option. The research that determined about the orbit of an electron around a nucleus would be that electrons orbit the nucleus in circular motions exactly as shown on the classic Bohr model.</span>
Answer:
The tension on each rope is 28.28 lb
Explanation:
Given that,
Weight = 40 lb
Angle = 45°
We need to calculate the tension on each rope
Considering the symmetry of the system, the tension of each rope must be same
So,

Put the value into the formula




Hence, The tension on each rope is 28.28 lb.
Answer:
Width of sound beam is 7.557 m
Explanation:
First we will calculate the wave length from given data:
λ=v/f
Were:
v is the speed
f is the frequency

We considered the opening long and narrow, Using single slit diffraction formula:
mλ=dsinΘ
where:
d is the crack width
m is the order
Θ is angle
Considering m=1, The angle between first minimum from center of beam is:

The width of beam is:
tanΘ=y/L

Width=7.557 m