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Irina-Kira [14]
3 years ago
5

A particle has an acceleration of +6.24 m/s2 for 0.300 s. At the end of this time the particle's velocity is +9.81 m/s. What was

the particle's initial velocity?
Physics
2 answers:
Lady_Fox [76]3 years ago
8 0
The formula we will be using is:

Final Velocity = Initial Velocity + Acceleration * Time
v = u + at
u = v - at = 9.81 - 6.24*0.3 = 7.938 m/s
aivan3 [116]3 years ago
8 0

Answer:

v_0=7.938\frac{m}{s}

Explanation:

This is uniformly accelerated motion, that is to say a motion with constant acceleration, we can use the kinematic equations, especifically the which one that relate the change in speed to acceleration and time:

v_f-v_0=at

So, Rewriting for initial speed:

v_0=v_f-at\\v_0=9.81\frac{m}{s}-(6.24\frac{m}{s^2})0.3s\\v_0=9.81\frac{m}{s}-1.872\frac{m}{s}\\v_0=7.938\frac{m}{s}

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