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jek_recluse
2 months ago
4

A 55 kg ice skater is gliding along at 3.5 m/s. Five seconds later her speed has dropped to 2.8m/s. What is the magnitude of the

kinetic friction acting on her skates?
Physics
1 answer:
Maru [3.3K]2 months ago
4 0

Answer:

7.7 N

Explanation:

From Newton's second law:

∑F = m a

Force equals mass times change in velocity over time:

F = m (Δv / Δt)

Substituting the values:

F = 55 kg × (2.8 m/s - 3.5 m/s) / 5 s

F = -7.7 N

The absolute value, representing the magnitude of kinetic friction, is 7.7 Newtons.

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