50 point giveway there will be 2 of this again
Answers
Answer:
Consider a particle which has mass ‘m’ and is moving with a uniform velocity.
this particle is moving along a certain surface of ROUGH texture. so now, when the lower surface of the particle comes in contact with the upper surface of the floor / ground, the particle loses some of its velocity because the roughness of the surface stops it from going ahead. since to overcome this force of opposition, the particle spends some of its energy. and this produces heat.
Answer:
The speed of an object is found out by dividing the distance that the object covers by the time in which the object takes to cover this distance. If 'D' is the distance traveled in some time 'T' then the speed of the object for this journey or 's' is equal to s = D/T. This is the simplest case.
Speed: 120 km/hr
Time: 8 hours