Ask Question
4 February, 12:44

A force of 14 N acts on a 5 kg object for 3 seconds.

a. What is the object's change in momentum?

b. What is the object's change in velocity?

+5
Answers (1)
  1. 4 February, 14:42
    0
    Answer: a) 42Nm b) 8.4m/s

    Explanation:

    Impulse is defined as object change in momentum.

    Since Force = mass * acceleration

    F = ma

    Acceleration is the rate of change in velocity.

    F = m (v-u) / t

    Cross multiply

    Ft = m (v-u)

    Since impulse = Ft

    and Ft = m (v-u) ... (1)

    The object change in velocity (v-u) = Ft/m from eqn 1

    Going to the question;

    a) Impulse = Force (F) * time (t)

    Given force = 14N and time = 3seconds

    Impulse = 14*3

    Impulse = 42Nm

    b) The object change in velocity (v-u) = Ft/m where mass = 5kg

    v-u = 14*3/5

    Change in velocity = 42/5 = 8.4m/s
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “A force of 14 N acts on a 5 kg object for 3 seconds. a. What is the object's change in momentum? b. What is the object's change in velocity? ...” in 📘 Physics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers