Question

A car of mass 1000 kg moving with the velocity of 10m/s hits a wall and comes to rest in 5sec find the force exerted by car on the wall?

Answer 1

Answer:

F =m ×a

m=1000kg

initial velocity = 36km/h

36km \: per \: hour = 36 \times \frac{5}{18} = 10 \: metr \: persecond36kmperhour=36×

18

5

=10metrpersecond

final velocity = 0

time = 5 seconds

a = \frac{v - u}{t} = \frac{0 - 10}{5} = - 2a=

t

v−u

=

5

0−10

=−2

F = ma

\begin{gathered}= 1000 \times ( - 2) = \\ = - 2000 \: newton\end{gathered}

=1000×(−2)=

=−2000newton

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Answer 2

Answer:

-2000 Newton

Explanation:

F=ma

F=1000*a. a=v-u/t

F=1000*-2

F=-2000 a=0-10/5

a=-2m/s2

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