I have a couple questions concerning force and friction. If you can help me with these, it will be greatly appreciated!
1)If an automobile moving along a road at constant velocity experiences a force of 400 N in the forward direction, how much frictional force opposes the car's motion? Explain?
2) What is the conceptual difference between mass and weight? How do you convert mass in kg and weight in Newtons?
3) Why do strong and weak nuclear forces seldom appear in free body diagrams that analyze the motion of normal-sized bodies?
4) A cat sits in a hat, and the hat sits on a mat. Draw a free body diagram for all and indicate which forces are equal.
1)If an automobile moving along a road at constant velocity experiences a force of 400 N in the forward direction, how much frictional force opposes the car's motion? Explain?
2) What is the conceptual difference between mass and weight? How do you convert mass in kg and weight in Newtons?
3) Why do strong and weak nuclear forces seldom appear in free body diagrams that analyze the motion of normal-sized bodies?
4) A cat sits in a hat, and the hat sits on a mat. Draw a free body diagram for all and indicate which forces are equal.
-
Answers:
1:Given the vehicle is moving with constant velocity.So net force is 0 N.Hence the forward force of 400N is balanced by 400N of frictional force in opposite direction.
2:Mass is an axiom.It cannot be proved or converted.It can be measured and its unit of measurement is kg.
(Mass as "popularly" said is amount of matter a body has and is invariant(unchanged) due to external forces on the body or the reference frame) .And weight is the amount of force experienced by the body under the action of gravity.Since it is nothing new but force, its measured in Newtons.
3:Strong and weak forces are short range forces;i.e;they lose their capability to attract or repel bodies effectively when compared to other forces(Gravity or Electromagnetic)
4:I AM AFRAID I CANT POST AN IMAGE.....hope you could cope up
1:Given the vehicle is moving with constant velocity.So net force is 0 N.Hence the forward force of 400N is balanced by 400N of frictional force in opposite direction.
2:Mass is an axiom.It cannot be proved or converted.It can be measured and its unit of measurement is kg.
(Mass as "popularly" said is amount of matter a body has and is invariant(unchanged) due to external forces on the body or the reference frame) .And weight is the amount of force experienced by the body under the action of gravity.Since it is nothing new but force, its measured in Newtons.
3:Strong and weak forces are short range forces;i.e;they lose their capability to attract or repel bodies effectively when compared to other forces(Gravity or Electromagnetic)
4:I AM AFRAID I CANT POST AN IMAGE.....hope you could cope up