Question

a car was moving with a uniform velocity .when it brake was applied, it stopped in 5 second with retardation 1m/s². calculate its initial velocity.

Answer 1

Answer:

Given :-

• A car was moving with a uniform velocity when it brakes was applied, it stopped in 5 seconds with retardation 1 m/s².

To Find :-

• What is the initial velocity.

Formula Used :-

$\clubsuit$ First Equation Of Motion Formula :

$\mapsto \sf\boxed{\bold{\pink{v =\: u + at}}}$

where,

• v = Final Velocity
• u = Initial Velocity
• a = Acceleration
• t = Time Taken

Solution :-

Given :

$\bigstar\: \: \bf{Final\: Velocity =\: 0\: m/s}$

$\bigstar\: \: \bf{Acceleration =\: - 1\: m/s^2}$

$\bigstar\: \: \bf{Time\: Taken =\: 5\: seconds}$

According to the question by using the formula we get,

$\longrightarrow \sf\bold{\purple{v =\: u + at}}$

$\longrightarrow \sf 0 =\: u + (- 1)5$

$\longrightarrow \sf 0 =\: u - 1(5)$

$\longrightarrow \sf 0 =\: u - 5$

$\longrightarrow \sf 0 - u =\: - 5$

$\longrightarrow \sf {\cancel{-}} u =\: {\cancel{-}} 5$

$\longrightarrow \sf\bold{\red{u =\: 5\: m/s}}$

${\small{\bold{\underline{\therefore\: The\: initial\: velocity\: is\: 5\: m/s\: .}}}}$

Answer 2

This is your answer bacha I hope this is helpful to u dear!!