Physics, 17.12.2019 10:31 ashiteru123

Compare the momentum of a semi truck moving 20 m/s and a bicycle moving 20 m/s

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Answer from: gabrielaaaa1323

The formula for momentum is p = mv, where p is momentum, m is mass in kg and v is velocity in m/s.

An object's mass and momentum are directly related; as mass increases, momentum will have a corresponding increase, assuming a constant velocity. Thus, an object with twice the mass of another object -- moving at the same speed and in the same direction -- will have twice the momentum.

Answer from: Quest

Kiloleter, mega leterhope this !

Answer from: Quest

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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Compare the momentum of a semi truck moving 20 m/s and a bicycle moving 20 m/s...

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