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2 years ago

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6. A car accelerates from rest to 5m/s in 20 s. The force from the engine is 2000N. The force of air resistance and friction act

ing is 1000N. What is the cars mass?

1 answer:

otez555 [7]2 years ago

4 0

Answer:

net force= 2000-1000=1000

a=v-u/t=5/20=1/4

m=?

m=f/a

=1000÷1/4=4000kg

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Answer:

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$\sum F = m_A a$

$T_A = m_Ag-m_Aa$

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$a' =\frac{(m_B-m_A)g}{(m_B+m_A)}$

$a' =\frac{(8-6.8)(9.8)}{(8+6.8)}$

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Therefore the error would be,

$\%error = \frac{a'-a}{a}*100$

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