Answer:
66.85 m
Explanation:
We are given that
Acceleration ,a=![2.7m/s^2](https://tex.z-dn.net/?f=2.7m%2Fs%5E2)
Speed of truck, v=9.5 m/s
We have to find the distance beyond which the traffic signal will the automobile overtake the truck.
Initial speed of automobile, u=0
We know that
![s=ut+\frac{1}{2}at^2](https://tex.z-dn.net/?f=s%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2)
Using the formula
![s=0+\frac{1}{2}(27)t^2=\frac{27}{2}t^2](https://tex.z-dn.net/?f=s%3D0%2B%5Cfrac%7B1%7D%7B2%7D%2827%29t%5E2%3D%5Cfrac%7B27%7D%7B2%7Dt%5E2)
For constant speed
Acceleration, a=0
Again
![s=vt+0=9.5t](https://tex.z-dn.net/?f=s%3Dvt%2B0%3D9.5t)
![9.5t=\frac{27}{2}t^2](https://tex.z-dn.net/?f=9.5t%3D%5Cfrac%7B27%7D%7B2%7Dt%5E2)
![t=\frac{9.5\times 2}{2.7}=7.037s](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B9.5%5Ctimes%202%7D%7B2.7%7D%3D7.037s)
Substitute the value of t
![x=9.5(7.037)=66.85m](https://tex.z-dn.net/?f=x%3D9.5%287.037%29%3D66.85m)
Hence, the distance beyond which the traffic signal will the automobile overtake the truck=66.85 m
Answer:
Electromagnetic radiation is an electric and magnetic disturbance traveling through space at the speed of light (2.998 × 108 m/s). It contains neither mass nor charge but travels in packets of radiant energy called photons, or quanta.
Answer:
ø = 53.7º
Explanation:
The measurement of kinetic energy in an object is calculated based on the object's mass and velocity.
KE=1/2mv²
where m is mass
v is velocity
given data
m=0.60 kg
v=4.0 m/s
So
KE = 1/2 . 0.6 . 4^2
KE= 4.8 J
All the KE is converted into GPE ("Gravitational potential energy (GPE) - energy stored in an object when moving the object to a height")
4.8 = 0.6 . 9.8 . ∆h
∆h = 0.816 m
This is the height that the object rises.
cos ø = (2 – 0.816 ) / 2 = 0.592
ø = 53.7º
No, light does not have mass because a photon does not way anything.
C. is the only logical answer. scientific conclusions should always be supported by evidence, facts, data, etc.