Asprinter leaves the starting blocks with an acceleration of 4.5m/s^2. what is the sprinter's speed 2 s later

9 m/s

Explanation:

For a uniformly accelerated motion, the speed at time t is given by:

where

u is the initial speed

a is the acceleration

t is the time

In this problem, we have:

u = 0 m/s is the initial speed

a = 4.5 m/s^2 is the acceleration

t = 2 s is the time

Substituting into the equation, we find

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.