Question

An object with a mass of 1.5 kg changes its velocity from 15 m/s to 22 m/s during a time interval of 3.5 seconds. what impulse was delivered to the object? 3.0 n • s 11 n • s 25 n • s 56 n • s

Answer 1

Answer:

11 Ns

Explanation:

Formula

• Impulse = Force x time

Calculating Force

• F = ma
• F = m(v - u / t) [From 1st Law of Motion : v = u + at]
• F = 1.5(22 - 15 / 3.5)
• F = 1.5 (7/3.5)
• F = 1.5 x 2 = 3 N

Calculating Impulse

• J = F x t
• J = 3 x 3.5
• J = 11.5 Ns ≅ 11 Ns (closest answer)

Answer 2

Answer:

is (B) 11 N • s

Explanation:

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