Physics, asked by hamzamdfurkan, 4 months ago

a motorbike joints a motorway traveling at 10m/s and increases speed to 30m/s with a constant acceleration of 1.25m/s​

Answers

Answered by sameer4263
0

Answer:

The origin of co ordinate system (x-axis), we assume it is the point where speeding car passes the police car

x

speeding

(t)=30t→1

The motion of the speeding car is the motion with constant speed of 30㎧

The motion of the police car is the motion with constant acceleration

∴x

police

(t)=v

initial

(t)+a

2

t

2

v(t)=v

initial

+at

v

2

(t)−v

initial

2

=2ax

police

(t)

a=3㎨

Initial velocity=0=v

initial

∴x

police

(t)=1.5t

2

→2

v(t)=3t

v

2

(t)=6x

police

(t)

x

speeding

(t

0

)=x

police

(t

0

)→3

Substituting equation 1,2

30t

0

=1.5t

0

2

t

0

=

1.5

30

=20s

Thus after 20s the police car catches the speeding car.

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