Question

what is the momentum of a runner of mass 65 kg who covers a displacement of 100m in 40 sec​

Answer 1

Answer:

162.5 is the answer

Explanation:

p=mv

p=m×d/t

p= 65×100/40=162.5kgms-1

Answer 2

Answer:

the runner's momentum is $162.5 kg m/s$

Explanation:

We define mass in motion by its momentum. Any thing in motion has momentum. Physics dictates that an object's momentum is equal to its mass times its velocity.

The amount of motion, or momentum, is a function of the amount of matter being transported as well as the speed at which it is moving. You move with momentum as you run, walk, etc. The car will have more momentum if it is travelling down the road at the same speed as a bicycle.

Because velocity is regarded as a vector, momentum is also regarded as a vector. This implies that momentum has both momentum and direction, with the position of momentum being represented by a vector or an arrow.

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

             $=\frac{100m}{40s}$

             $=2.5 m/s$

$mass = 65 kg$

$therefore,$

$momentum = mass*velocity$

                   $= (65*2.5) kg m/s$

                    $= 162.5 kg m/s$

Therefore, the runner's forward momentum is $162.5 kg m/s$

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