Question

a body of 20kg mass is moving with 30m/s. its velocity increases to 60m/s in 10s. find its acceleration, change in momentum of body and external force required for this change​

Answer 1

Answer:

ANSWER

Step-by-step explanation:

3 M/S² IS ACCELERATION

-600 kg m/s

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Answer 2

$Given ,$

$Mass \: m = 20 kg$

$Initial \: Velocity \: u = 30 \: m ^{ - 1}$

$Final \: Velocity \: v = \: 60 \: m \: s^{ - 1}$

$Time \: t \: = 10s$

$Acceleration \: a = ( \frac{v - u}{t} )$

$= ( \frac{60 \: m \: s ^{ - 1} - \: 30 \: m \: s ^{ - 1} } {10 \: s} )$

$= \frac{30 \: m \: s^{ - 1} }{10 \: s}$

$= 3 \: m \: s ^{ - 2}$

$Change \: In \: Momentum \: = \: ∆p \: = m∆v$

$= m \: \times (v - u)$

$= 20 \: kg \: \times (60 - 30 \: m \: s^{ - 1} )$

$= 20 \: \times \: 30 \: m \: s ^{ - 1}$

$= \: 600 \: kg \: ms ^{ - 1}$