Physics, 05.04.2020 02:46 12huskiesmidnight

Baptiste walked 420 m in 17.5 min. what is his average speed in m/min? what is his average speed in m/s?

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Answer from: TayJoker966

Average speed in m/min is 24m/min

Average speed in m/sec is 0.4m/sec

Explanation:

Given:

Distance, x = 420m

Time, t = 17.5 min

Average speed in m/min and m/s

Average speed in m/min = $\frac{distance}{time}$

= $\frac{420}{17.5}$

= 24 m/min

Average speed in m/sec = $\frac{distance}{time}$

= $\frac{420}{17.5 X 60}$

= 0.4 m/sec

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.

Answer from: Quest

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

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Baptiste walked 420 m in 17.5 min. what is his average speed in m/min? what is his average speed in...