3. If a bullet having the mass of 50 g is fired at the velocity of 200km per hour, how much kinetic energy does it have?

77.3J

Explanation:

Given parameters:

Mass of the bullet  = 50g  = 0.05kg

Velocity of the bullet  = 200km/hr

Unknown:

Kinetic energy of the bullet  = ?

Solution:

Kinetic energy is the energy due to motion of a body.

It is mathematically expressed as;

        K.E  = m v²

m is the mass

v is the velocity

 we need to convert the velocity to m/s

  200km/hr is 55.6m/s

Input the parameters and solve;

 K.E = x 0.05 x 55.6²  = 77.3J

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.