Answer:
= 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
Answer:
how close to the true value a measurement is
The answer is the electromagnetic spectrum
Answer:
Explanation:
r = Distance between Earth and Sun =
Time taken to complete one rotation around Sun is given by
Centripetal acceleration is given by
The centripetal acceleration of the Earth in its orbit is
Force is given by
The force on the Earth is