Question

11. An object moves along a straight line with anacceleration of 2 m/s2. If its initial speed is 10 m/s,what will be its speed 5 s later?
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Answer 1

Answer:

acceleration = v- u / t

v = acc × t + u

= 2× 5 + 10 = 20 m/ s

Answer 2

Answer:

Given :-

• An object moves along a straight line with an acceleration 2 m/s².
• Its initial speed is 10 m/s and it is 5 seconds later.

To Find :

• What is the speed (final velocity) of an object.

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 :

• Initial Velocity (u) = 10 m/s
• Time Taken (t) = 5 seconds
• Acceleration = 2 m/s²

According to the question by using the formula we get,

$\longrightarrow \sf v =\: (10) + (2)(5)$

$\longrightarrow \sf v =\: 10 + 2 \times 5$

$\longrightarrow \sf v =\: 10 + 10$

$\longrightarrow \sf\bold{\red{v =\: 20\: m/s}}$

${\small{\bold{\underline{\therefore\: The\: speed\: (final\: velocity)\: of\: an\: object\: is\: 20\: m/s\: .}}}}$