Answer:
is greatest
Explanation:
Given:
Substitute , so
Then, get the common value from the equation.
So, the speed of the air is greatest.
<u>Answer:</u>
The stopping car has negative acceleration.
<u>Explanation:</u>
We know acceleration is the rate of change of velocity. That is
Acceleration(a) = ( Final velocity - Initial velocity )/ Time taken.
Here Final velocity = 0 km/h( car stops) and initial velocity = 30 km/h
So acceleration = (0-30)/time = -30/ time
Time is always positive , so -30/time is negative, so the stopping car has negative acceleration.
Answer:
V0 = 44.97m/s
Height above fence = 66.67m
Explanation:
The detailed calculation is done as shown in the attachment
<span>
The rate of bullets per minute = 6000 per minute
= 6000/6 per sec
=10 bullets per sec
as we know
F=n * m * v
=10 . 200 . 25 .10^-3
= 2N</span>
Hi there!
The maximum deformation of the bumper will occur when the car is temporarily at rest after the collision. We can use the work-energy theorem to solve.
Initially, we only have kinetic energy:
KE = Kinetic Energy (J)
m = mass (1060 kg)
v = velocity (14.6 m/s)
Once the car is at rest and the bumper is deformed to the maximum, we only have spring-potential energy:
k = Spring Constant (1.14 × 10⁷ N/m)
x = compressed distance of bumper (? m)
Since energy is conserved:
We can simplify and solve for 'x'.
Plug in the givens and solve.