Answer:
The force acting on the body can be determined using Newton's second law of motion, which states that force (F) is equal to the mass (m) of an object multiplied by its acceleration (a). In this case, since the change in velocity (Δv) of 4 m/s occurs over a time interval (Δt) of 4 s:
Force (F) = mass (m) × acceleration (a)
Acceleration can be calculated using the formula:
Acceleration (a) = change in velocity (Δv) ÷ time interval (Δt)
Substituting the given values into the formula:
Acceleration (a) = 4 m/s ÷ 4 s = 1 m/s²
Since the mass (m) of the body is 1 kg, we can now calculate the force:
Force (F) = 1 kg × 1 m/s² = 1 kg⋅m/s²
Hence, the force acting on the body is 1 kilogram times meter per second squared, which is equivalent to 1 Newton (N).
Step-by-step explanation: