Un niño empuja una carreta con su perro dentro. La masa del perro y la carreta juntos es de 45 kg. La carreta
acelera a 0.85 m/s2
. ¿Cuál es la fuerza ejercida por el niño?

The force exerted by the child is 38.25 Newton

Explanation:

We use the formula F=mxa (m=mass and a= aceleration):

F= 45kg x 0,85 m/s2=38, 25 kgxm/s2= 38, 25 N

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer