What is the mass of a body if, under the action of a force of 0.5 kN, moving from a state of rest

What is the mass of a body if, under the action of a force of 0.5 kN, moving from a state of rest, in 8 seconds its speed increased to 10 m / s.

Initial data: F (force acting on the body) = 0.5 kN (500 N); the body moved from a state of rest (V0 (initial velocity) = 0 m / s); t (duration of movement) = 8 s; V (final speed) = 10 m / s.

1) Define the acceleration of the body: a = (V – V0) / t = (10 – 0) / 8 = 1.25 m / s2.

2) Calculate the body weight: m = F / a = 500 / 1.25 = 400 kg.

Answer: Body weight is 400 kilograms.