Question

Calculate the force required to impart a car with a velocity of 30m/s in 10s satarting from rest .The mass of the car is 1500 kg

Answer 1

first calculate acceleration from the equation V=u+at. get a. now calculate f=ma.

Answer 2

$\huge \rm \pink{Answer:-}$

Solution:-

Mass:- 1500kg.

Let us calculate The value of acceleration by using the first equation of motion..

Now:-

Initial velocity, u=0 (car starts from rest)

And:-

Final velocity, v=30m/s

Time taken:-

T=10s

Now, putting these values in the equation:

We get,

$⇝\bf{v = u + at}$

$⇝\bf{30=0+a×10}$

$⇝ \bf{10a = 30}$

$⇝\bf{a = 30/10m/s}$

$⇝ \bf{acceleration,a=3 m/s²}$

Now, putting m=1500kg and a=3m/s² in equation'

we get,

$⇝ \bf{f=m×a}$

$⇝ \bf{f = 1500 \times 3 N}$

$⇝ \bf{4500 \: n}$

Thus, the force required in this case is of 4500newtons...