Question

A 20kg box sits on a frictionless surface. a girl applies a 100n force to the box as it moves 3 meters. at what velocity will the box be sliding after she stops pushing on it?

Answer 1

5.5 m/s

Step-by-step explanation:

First find a:

a = F/m = 100N / 20kg = 5 m/s²

Now find final velocity (v) using:

v² = v₀² + 2aΔx

initial velocity = v₀ = 0 because it starts from rest

Δx = 3 m

v² = 0 + 2(5 m/s²)(3 m) = 30 m²/s²

v = √30 m²/s² = 5.5 m/s