It is weigh-in time for the local under 85 kg rugby team. the bathroom scale used to assess eligibilty can be described by hooke's law, which is depressed 0.65 cm for its maximum load of 115 kg. what is the spring's effective spring constant?

a player stands on the scale, and it depresses by 0.39cm. what is the mass of the player? ,

a)Spring constant = k = 1.73 × 10^5 N/m

b)Mass of player = m = 69 kg

Explanation:

a)According to hook’s law, "force applied on a spring is directly proportional to extension produced in the spring". So,  

                                        F = kx  

                       k = mg/x = (115×9.8)/0.0065 = 1.73 × 10^5 N/m

a)Mass of player = m = kx/g = (1.73 × 10^5)(0.0039)/9.8 = 69 kg.

Hence, player can play in under 85 kg team.

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation:

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.