a speed swimmer love to race around the parks pine which is 25m around if she can swim 20 laps in 7200s what is her average speed?

the average speed of the swimmer is 0.069 m/s.

Explanation:

Given;

complete distance around the park pine, d = 25 m

total lap completed, = 20 laps

time of laps completion, t = 7200 s

The total distance completed by the swimmer = 20 x 25 = 500 m

The average speed of the swimmer = distance / time

                                                            = (500 m) / (7200 s)

                                                            = 0.069 m/s.

Therefore, the average speed of the swimmer is 0.069 m/s.

8 pound

Explanation:

As per Newtons law F = ma

where F is the applied force, m is the mass of object and a is the acceleration.

now if we see the equation : a= F/m

hence the acceleration is inversely proportional to the mass of the body.

If one ball has mass of 8 pound and another of 13 pounds then ball with less mass that is 8 pound will have greater acceleration.