A force of 1000 Newtons is used to push a box on a flat floor. It accelerated at a rate of 5 m/s2. What is the mass of the wagon?

67.56kg

Explanation:

Fapp+mg = ma

Fapp = applied force

mg = reactional force

g = acceleration due to gravity

Where g = 9.8m/s^2 a = 5 m/s2, Fapp = 1000N.

1000N = ma + mg

1000N = m (a+g)

1000N = m (5+9.8)

1000N = m*14.8

m = 1000:14.8

m = 67.56kg.

Hence the mass of the wagon will be 67.56kg