An increase in average speed of 1 km/h typi- cally results in a 3% higher risk of a crash involving injury, with a 4–5% increase for crashes that result in fatalities. — Speed also contributes to the severity of the impact when a collision does occur. Hope this helps!
Answer:
6667.9 J
Explanation:
We are given that
Mass of cannon.m=14 kg
Time,t=3.15 s
Initial velocity,u=0
We have to find the work done by gravity on the falling cannon ball.


Substitute the values

Work done,W=mgh
Using the formula

Answer:
The velocity of the astronaut is, v = - 0.36 m/s
Explanation:
Given data,
The mass of the astronaut, M = 84 kg
The mass of the gas expelled by the thruster, m = 35 g
= 0.035 g
The velocity of the gas expelled, v = 875 m/s
According to the conservation of momentum,
MV + mv = 0
V = - mv / M
Substituting the values,
V = - 0.035 x 875 / 84
= - 0.36 m/s
The negative sign in the velocity indicates the astronaut moves opposite to the direction of velocity of gas.
Hence, the velocity of the astronaut is, v = - 0.36 m/s
For a cylinder of mass M and radius R is released from rest at the top of an inclined plane, the expression is mathematically given as
L=MR * √{gh/3}
<h3>What is the expression for the angular momentum of the cylinder about its center of mass when it has rolled a vertical distance h.?</h3>
Generally, the equation for the angular velocity is mathematically given as
w=V/R
Therefore

In conclusion, at instance of IW, the angular velocity

L=MR * √{gh/3}
Read more about momentum
brainly.com/question/7538238
Answer:
picture is not showing up sorry
Explanation: