Question

a car starts from rest and required a velocity of 72 km/h in 10 seconds.calculate the acceleration and the distance traveled by car​

Answer 1

Step-by-step explanation:

Initial Velocity = u = 0

Final velocity = v = 72 km/hr

= 72 ×

18

5

= 20 m/s

Time = t = 10 sec

Acceleration = a

Equation of motion :-

v = u + at

20 = 0 + 10a

a =

10

20

a = 2 m/s

2

displacement = distance traveled = s

Equation of motion :-

v

2

−u

2

= 2as

20

2

=2×2×s

400 = 4s

s =

4

400

s = 100 m

Average velocity =

time

displacement

=

10

100

= 10 m/s