The mass of a body is 25 kg and the value of acceleration due to gravity is 9.8 m/s2. Calculate the weight of the body. (2+2=4)

Mass =25kg

Explanation:

Given:

Weight on Earth (W)=245N

Acceleration due to gravity on the Earth (g)$$= 9.8\,m/s^2$$

Therefore,

Mass = W /g=(245/9.8)=25kg

28. evolution

29. environment, survive, offspring  

explanation:

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force