Physics, 18.11.2020 17:30, leasiamoore

Aaron rode her bike to his house to play cards he Road for 1.6 hours at 6.5 KMH another 15 minutes at four KMH what was her average speed during her trip

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answered: viv1302

The average speed during the trip is 6.16 $\frac{km}{hour}$

Explanation:

Speed is a physical quantity that expresses the variation in position of an object and as a function of time. In other words, speed expresses the relationship between the space traveled by an object, the time used for it and its direction.

The speed can be calculated by the expression:

$Speed=\frac{distance}{time}$

Aaron rode his bike home for 1.6 hours at 6.5 km/h and another 15 minutes at 4 km/h. So, the distance in each of the stages can be calculated as, taking into account that 60 minutes= 1 hour:

distance1=speed*time= 6.5 $\frac{km}{h}$ *1.6 hours= 10.4 kmdistance2= speed*time= 4 $\frac{km}{h}$ *15 minutes= 4 $\frac{km}{h}$ *0.25 hours= 1 km

So:

total distance= 10.4 km + 1 km= 11.4 kmtotal time= 1.6 hours + 0.25 hours= 1.85 hours

Then:

$Speed=\frac{11.4 km}{1.85 hours}$

$Speed=6.16\frac{km}{hour}$

The average speed during the trip is 6.16 $\frac{km}{hour}$

answered: Guest

6/12=1/2

step-by-step explanation:

answered: Guest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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