If the units of energy, force and velocity are 50 J, 5 N and 2m/ s, what will be unit of mass, length and time

The units of energy (Joules), force (Newtons), and velocity (meters per second) are already given. To find the units of mass, length, and time, we can use the relationships between these quantities.

1. Mass: The unit of force is Newton, which is defined as the force needed to accelerate a one kilogram mass at a rate of one meter per second squared (N = kg*m/s^2). So, the unit of mass is Kilogram (kg).

2. Length: The unit of velocity is meters per second (m/s), which is a measure of how much distance (length) is covered per unit of time. So, the unit of length is Meter (m).

3. Time: As mentioned, the unit of velocity is meters per second, which measures the distance covered per unit of time. So, the unit of time is Second (s).