Question

5 white equations of motions give name and unit of each physical quantity used in these equations ?​

Answer 1

Answer:

$. |. = = < < . < |$

Answer 2

Explanation:

The three equations of motion are:

Equation 1 : v=u+at

Equation 2: s=ut+

2

1

at

2

Equation 3: v

2

=u

2

+2as

In the above equations, u is the initial speed, v is the final speed, t is the time taken, a is the acceleration and s is the displacement of the body.

(b) Initial velocity, u=0m/s

Final velocity, v=72km/h=20 m/s

Time, t=10s

(i) Acceleration =

time taken

Final velocity−Initial velocity

So, a=

t

v−u

=

10

20−0

=

10

20

=2m/s

2

(ii) Average velocity =

2

Initial velocity + Final velocity

Average velocity =

2

0+20

=

2

20

m/s=10m/s

(iii) Distance travelled = Average velocity × Time

=10m/s×10s=100m