Question

a motor car of mass 1200kg is moving along a straight line with a uniform velocity of 9 km/hr. its velocity is slowed down to 18km/hr in 4sec by an unbalanced external force . calculate the acceleration and change in momentum . also, calculate the magnitude of the force required.

Answer 1

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Refer and consult the following attachments for a detailed explanation and step by step solution along with time by time elaborations to reach the final conclusion in our answers....

$\boxed{\bf{Acceleration \: of \: this \: vehicle = a = 0.625 \: m/s^2}}$

$\boxed{\bf{Change \: in \: momentum \: of \: this \: vehicle = M_{(v - u)} = 3000 \: Kg \: m/s}}$

Magnitude of the force required to slow down the vehicle by an unbalanced external force;

$\boxed{\bf{F = 750 \: N}}$

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