Question

a motor boat starting from rest on the lake accelerates in the straight line at a constant rate of 3 M per second square for 8 second how does it travels at last

Answer 1

given :-

u (initial velocity) = 0m/s

acceleration = 3m/s²

time = 8 seconds

we have to find the distance travelled by the motor boat in 8 seconds.

by using second equation of motion. that is s = ut + 1/2 at²

where s is the distance.

==> s = (0 × 8) + 1/2 × 3 × (8)²

==> s = 0 + 3/2 × 64

==> s = 3 × 32

==> s = 96m

hence, the motor boat travelled 96m in 8 seconds.

HOPE THIS HELPS..!!

Answer 2

Here ,

Distance travelled , s = ?

Initial speed , u = 0

Time , t = 8.0 s

Acceleration , a = 3.0 m / s ²

Now ,

s = ut + 1/2 at²

s = 0 * 8.0 + 1/2 * 3 * ( 8.0 )²

s = 0 + 1/2 * 3 * 64

s = 96 m

Thus , the boat travels a distance of 96 metres.