= 19.32 m/s and
= 27.32 m/s
Explanation:
The kinetic energy has as formula
K = ½ m v²
Where m is the mass and v the speed of the body.
If the policeman calculates the kinetic energy, let's clear the speed
v = √ 2K/m
Let's reduce the units to the SI system
K = 16.32 KJ (1000 J / kJ) = 16.32 10³ J
Let's calculate
v = RA (2 16.32 10 3/60)
v = 23.32 m / s
The rider at 14.4 km/h, reduce
= 14.4 km / h (1000m / 1km) (1h / 3600s) = 4.00 m / s
We already have the relative speed of the two (rider and police car) which is 23.32, we also have the rider speed 4.0 m / s, let's calculate the possible police speeds
These two speeds come from going in the same direction or in opposite directions
=
±
=
- vj
= 23.32 - 4
= 19.32 m/s
=
+ vj
= 23.32 +4
= 27.32 m/s
the most accurate qualitative description of the magnetic field vector B inside the cylindrical resistor is "The magnetic field vector points radially away from the axis of the cylinder."
Explanation:
A magnetic field is a vector field that describes the magnetic influence of electric charges in relative motion.