Physics, 07.10.2019 01:50 uglyturtle15

Joseph jogs from end a to other end b of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point c in another 1 minute what are his average speeds and velocities in jogging from a to b and from a to c

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(a) The average speed from A to B would be 1.76 metre per second and the average velocity from A to B would also be 1.76 metre per second

(b) The average speed from A to C would be 1.73 metre per second and the average velocity from A to C would be 0.87 metre per second

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the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

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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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Joseph jogs from end a to other end b of a straight 300 m road in 2 minutes 30 seconds and then turn...

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