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  2. A rocket with a mass of 500 grams is launched straight up. It achieves a velocity of 20.0 m/s in 2.00 seconds. The average thrust force is??
# Engineering

A rocket with a mass of 500 grams is launched straight up. It achieves a velocity of 20.0 m/s in 2.00 seconds. The average thrust force is??

Answers (1)
M manish

As we learnt

Power if the force is constant -

P=\frac{dw}{dt}= P= \vec{F}\cdot \vec{v}

- wherein

\vec{F}\rightarrow force

\vec{v}\rightarrow velocity

 

 V=u+at     u=o

\Rightarrow v=at

\Rightarrow 20=2a \Rightarrow a=10ms^{-2}

F= m (g+a)=0.5 (9.8+10)

F= 19.8 \times 0.5=9.9 N

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