Question

An object moves along a straight line with an acceleration of 2m/s square. If its intial speed is 10m/s, what will be its speed 5s later

Answer 1

Answer:

20 m/s

Explanation:

According to the given question,

a = acceleration = 2m/s^2

u = initial velocity = 10 m/s

t = time = 5 sec

v = final velocity = ?

And we are asked to find the final velocity of the object.

It's given in that question that this motion is linear i.e, distance is equal to displacement. But we can solve it without going into distance or displacement stuff.

We know,

• v = u+at

Putting the values we get,

• v = 10+2×5

• v = 10+10

• v = 20 m/s

And thus the velocity of the object after 5 sec is 20 m/s when it's acceleration is 2m/s^2 and initial velocity is 10 m/s.

Answer 2

Explanation:

given that.

acceleration (a)=2m/s^2

initial velocity(u)=10m/s

time(t)=5sec

given that the motion is linear,

V=u+at

=10+2×5

=10+10

=20m/s