Answer:
Velocity = v = 35 m/s
Explanation:
Kinetic energy of an object is defined as the energy possess by an object due to its motion. Kinetic energy K.E of an object is equal to the half of the mass of that object multiplied by square of the object's velocity.
Mathematically,
v = 35 m/s
The question is incomplete. The complete question is :
A car is stopped at a traffic signal. A second car rear-ends the first car. From the crush of the two vehicles, it is estimated that the second car was traveling at 15 mph when it impacted the first car. If the second car laid down 166 feet of skid marks before the crash took place, how fast was the second car traveling when its brakes were locked up? The approach to the intersection where the accident took place is on a 2.5 percent downgrade. Assume the AASHTO recommended deceleration rate of
Solution :
From the equation, the skid distance is given by
Here, = deceleration rate,
h = = -0.025
= initial speed of the car
= speed when impacted
Therefore,
or
Answer:
is the "momentum" of the given moving object.
Explanation:
"Momentum" of an object is defined as the "velocity" changed by an object by moving the object from "one place" to "another place". The "Momentum" of an object is represented as "". It is the product of the "mass of object" and the "velocity of object". It is mathematically written as .
Where, "m" is mass of object and "v" is velocity of object.
Given that,
Mass of an object is 25 Kg.
Velocity of an object is 25 m/s.
Now, to calculate momentum of the given object us the formula .
Plug the values,
Answer:
Acceleration(a)=3m/s^2
Time(t)=1min[1min=60s]
=1×60
=60s
Initial velocity(u)=0m/s
Velocity(v)=?
We know that,
Acceleration=v-u/t
Or,3m/s^2=v-0/60
Or,3×60=v-0
Or,v=180m/s
So,the velocity is 180m/s.
Hope,it will helpyouu!
Answer:
terms of refraction and wavelength, why dispersion of white light happens.
Explanation:
hope it helps