For this conversion you should know that 1 meter has 1000 millimeters and that 1s equals 1000000 micro seconds, then:
7mm/us * 1m/1000mm * 1000000us/1s = 7000 m/s
The mm are canceled just like the micro seconds and the result remains in m / s .
Therefore option A is correct
A) 7000m / s
C, 184,000 KM, as it means, "Kilometers", is a measurement of distance, close to miles.
Answer:
K = 1800 kJ
Explanation:
Given that,
The speed of the object, v = 30 m/s
Mass of the object, m = 4000 kg
We need to find the kinetic energy of the object. The formula for the kinetic energy is given by :

So, the required kinetic energy is equal to 1800 kJ.