can you help me with my science homework please?

Question

thank you so much here are the questions

1). on earth, why does an object of a large mass weigh more the an object of a smaller mass?

2). explain why gravity does not cause a falling object of a large mass to accelerate at a faster rate than a falling object of a smaller mass.

3). if the forces inn an action-reaction pair are equal in size and opposite in direction, why arent' they balanced forces?

4). Explain why a marble moves in a straigh line as it rolls across the table but fallows a curved path once it rolls off the table

thank you so much...if you need any help on anything just e-mail me at [e-mail]

Answer 1

1) Mass is related in physics to Mass=Force/Acceleration. The weight that you speak of is the force of gravity, which in the above equation is Force. The acceleration due to gravity is 9.8 m/s^2 near the earth's surface. Since Mass and Force are directly related, if Mass increases or is larger, the Force increases or is larger.

2) Acceleration is constant. You will learn this later on in Newton's Theory of Gravitation.

3) Strangely, I don't know.

4) The marble has balanced forces on the table (Normal force and Force of Gravity. However, once off the table, the normal force dissapears and the gravitational force is all that is left. Unbalanced forces cause acceleration.

Answer 2

1). on earth, why does an object of a large mass weigh more the an object of a smaller mass? WEIGHT EQUALS MASS MULTIPLIED BY GRAVITY

2). explain why gravity does not cause a falling object of a large mass to accelerate at a faster rate than a falling object of a smaller mass. GRAVITY IS A CONSTANT

3). if the forces inn an action-reaction pair are equal in size and opposite in direction, why arent' they balanced forces? DON'T KNOW

4). Explain why a marble moves in a straigh line as it rolls across the table but fallows a curved path once it rolls off the table AS IT FALLS, IT HAS MOMENTUM IN TWO DIRECTIONS - FORWARD AND DOWNWARD, PRODUCING A CURVE

Answer 3

1) Weight on a balance measures the force of gravity which is = Mass X 9.8 (Constant). So since gravity is proportional to the mass. .. the weight on a balance is proportional to the mass of the object.

2) Since the acceleration due to gravity (g=9.8) is constant. The force of gravity F = Mass x g. As the mass of the object increases, so does the gravitational force exerted by the earth. Think of it this way. A larger mass needs more force to pull it towards the earth, than a smaller mass does. So while the Force increases and the Mass increase.. the acceleration remains constant.

3)The Question doesn't make sense. If they are equal in size and opposite in direction, there are supposed to be balanced forces. In this case, the resultant (net) force is zero, therefore the acceleration is zero (from F=ma) resulting in no motion at all, which is the definition of balanced forces.

4)When the marble moves across the table, there is only a horizontal component of velocity. The vertical force of gravity is balanced by the opposite and equal contact force of the table (no net force). When the marble rolls off the table, there is a net downward force of gravity. The constant horizontal component of velocity along with the accelerating vertical component of velocity creates this curved path.

Answer 4

3) This is because in an action-reaction pair the forces are equal in size and opposite in direction, but they are acting on two different objects. This would be me pushing on a box. The force I put on the box is equal in size and opposite in direction to the force the box puts back on me, but the box still moves.

For forces to be considered balanced all the forces have to be acting on the same object. This would be you and me both pushing on the same box. Now the forces on the box or equal and opposite and on the same object.

Answer 5

1.because there is more mass for the gravity to affect

2.the inertia difference balances out the mass difference

3/4.??????????

Answer 6

nicely enable me only whip out the ole McDougal Littell Earth technology e book I actual have in my closet o wait, maximum folk answering this don't have your textbook the questions may well be effective