Question

A bird flies for 4 s with a velocity of (t-3) m/s in a straight line, where tis in second. The distance travelled by the bird in 4 second is.

Please answer this ASAP​

Answer 1

Explanation:

Velocity, u=∣t−2∣

Time, t=4 s

at t=0, u=2 m/s

t=2, u=0 m/s

t=4 ,u=2 m/s

between time t=0 to t=2sec

a=

2

0−2

=−1 m/s

2

s

1

=ut+

2

1

at

2

s

1

=2×2+

2

1

×(−1)×4=2

Between time t=2 to t=4sec

a=

2

0−2

=1 m/s

2

s

2

=

2

1

×1×4=2

Thus,

Total distance;

s

1

+s

2

=2+2=4 m

Thus, during the 4 seconds, the bird travels a distance of 4 m.