An athlete on a sled is moving with a speed of 3.0 m/s across a pond covered with ice. If the total mass of the sled-athlete system is 95.0 kg, what magnitude of the average force is required to bring the sled to rest in 15.0 s

Given Information:

Mass = m = 95 kg

Initial velocity = v₁ = 0 m/s

Final velocity = v₂ = 3 m/s

time = t = 15 seconds

Required Information:

magnitude of average force = ?

magnitude of average force = 19 N

Explanation:

From the Newton's second law of motion

F = ma

From the kinematics equations,

v₂ = v₁ + at

at = v₂ - v₁

a = (v₂ - v₁)/t

a = (3 - 0)/15

a = 0.2 m/s²

F = 95*0.2

F = 19 N

Therefore, the magnitude of the average force required to bring the sled to rest is 19 N.

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