A 3.0 kg puck slides due east on a horizontal frictionless surface at a constant speed of 4.5 m/s. Then a force of magnitude 6.0 N, directed due north, is applied for 1.5 s. Afterward, a. What is the northward component of the puck’s velocity?
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Ответ:
3 m/s
The northward component of the puck’s velocity is 3 m/s
Explanation:
Applying the impulse momentum equation;
Impulse = change in momentum
Ft = m(∆v)
∆v = Ft/m
F = force = 6.0 N due north
t = time = 1.5 s
m = mass = 3.0 kg
Substituting the values;
Change in velocity ∆v = (6 × 1.5)/3.0 = 9/3
∆v = 3 m/s due north
And since the initial northward component of the puck’s velocity is zero.
The final northward component of the puck’s velocity is;
v = 0 + 3 m/s
v = 3 m/s
The northward component of the puck’s velocity is 3 m/s
Ответ: