Question

a car is accelarating uniformly between two check points in 60 meter apart the time taken between two checkpoint in 4 second if the initial speed is 5m/s find the speed and accelaration of car
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Answer 1

Answer:

a=5

vfinal=25

Explanation:

find the attached photo

Answer 2

Answer:

From kinematics equation S=ut+

2

1

gt

2

; where S=60m; t=6s

60=u×6+

2

1

a×6

2

...(i)

and the velocity at second point is given as v=15m/s

From kinematics equation v=u+at

15=u+a×6....(ii)

solving equation (i) and (ii)

a=

3

5

m/s

2

;u=5m/s

2

The car starts from rest with uniform acceleration

Using kinematics equation

v

2

=u

2

+2aS; v=5m/s;u=0m/s;a=

3

5

m/s

2

⇒25=0+2×

3

5

×S

S=7.5m