Question

2. A scooterist moves with uniform accelera ion of
2 m/s² for 5 s. Find his final velocity if his present
velocity is 18 km/h.​

Answer 1

Solution :-

Given :-

Initial Velocity = 18 km/h or

= 18 × 5/18

= 5 m/s

Acceleration = 2 m/s²

Time = 5 sec

Now we have to Solve this :-

We have got the initial velocity ,time and acceleration

So we can use the motion equation

v = u + at

→ v = 5 + 2(5)

→ v = 5 + 10

→ v = 15 m/s

Now either velocity = 15 m/s or

= 15 × 18/5

= 54 km/h

So velocity

$\Huge{\boxed{\sf{ = 15 \: m/s}}}$

Or

$\Huge{\boxed{\sf{ = 54 \: km/h}}}$

Answer 2

Answer:

acceleration = 2m/s²

time = 5s

initial velocity = 18km/h ( we need to convert it to m/ s)

final velocity =?

a= v(final velocity)- u(initial velocity)/t(time)

18km / h

1km = 1000m

18km = 18*1000 = 18000m

1h = 60*60= 3600s

18000/3600 = 5m/s

2m/s²= v - 5m/s/5

v - 5/5 = 2

v-5 = 10

v = 15m/s

HOPE IT HELPS.......