Answer:
Final velocity will be -5.33 m/sec
Explanation:
We have given mass of the rugby player m = 106 kg
Initial speed = 7.75 m/sec
Backward force 
Time is given as 
Impulse is given by impulse = force × time
So impulse 
( as force is backward )
We know that impulse is given by change in momentum
So 
A subduction zone is formed at a convergent<span> plate </span>boundary<span> when one or both of the tectonic plates is composed of oceanic crust. The denser plate, made of oceanic crust, is subducted underneath the less dense plate, which can be either </span>continental <span>or oceanic crust.</span>
Answer: a) io=233.28 A ( initial current); b) τ=R*C= 22.31 ms; c) 81.7 ms
Explanation: In order to explain this problem we have to use, the formule for the variation of the current in a RC circuit:
I(t)=io*Exp(-t/τ)
and also we consider that io=V/R=(1.5/6.43*10^3)
=233.28 A
then the time constant for the RC circuit is τ=R*C=6.43*10^3*3.47*10^-6
=22.31 ms
Finally the time to reduce the current to 2.57% of its initial value is obtained from:
I(t)=io*Exp(-t/τ) for I(t)/io=0.0257=Exp(-t/τ) then
ln(0.0257)*τ =-t
t=-ln(0.0257)*τ=81.68 ms
Answer:
The average speed of the cars is 50mph
Explanation:
Option C
