Question

if a trolley starts from rest with an acceleration of 2 metre per second square the velocity of 4s would be ​

Answer 1

Answer:

8 m/s

Explanation:

According to the given question,

u = initial velocity = 0 m/s

a = acceleration = 2 m/s^2

t = time = 4 sec

v = final velocity

And we are asked to find the final velocity after 4 sec.

We know,

• v = u + at

Putting the values we get,

• v = 0 + 2×4

• v = 8 m/s

Thus final velocity after 4 sec with acceleration of 2 m/s^2 is 8 m/s.

Answer 2

Here we have to apply Newton 1st law of motion

v = u + at

Some notation which we have to clarify :-

u stands for initial velocity

a stands for acceleration

t stands for Time

v stands for final velocity

Information provided by question :-

u = 0 m/s

a = 2 m/s^2

t = 4 sec

v = We have to find

Now by applying formula

v = u + at

v = 0 + 2 × 4

v = 8 m/s