i have a couple science questions. can someone please help me? there are only five?

Question

1.Friction is a force that
a. opposes an objects motin.
b. does not exist when surfaces are very smooth.
c.decreases with larger mass.
d. all of the above

2. Rolling friction
a. is usually less than sliding friction.
b. makes it difficult to move objects on wheels.
c. is usually greater than sliding friction.
d. is the same as fluid friction.

3.If earth's mass doubled your weight would
a. increase because gravity increases.
b. decrease because gravity increases.
c.increase because gravity decreases.
d. not change because you are still on earth.

4. The amount of gravity between 1 kg of lead and Earth is __________ the amount of gravity between 1 kg of marshmallows and Earth.
a. greater than
b. less than
c. the same as
d. none of the above

5.Use the following to create a concept map: speed, velocity, acceleration, force, direction, motion

thank you so much

please rate from 1 - 10 how much you thin your right
1 being wrong
10 being right

Answer 1

all i knw is that i think #1 is d..
im kinda lerning this stuff in physics but its too hard...
God Bless and good luck sis:)

Answer 2

1a, 2a, 3a, 4c ( a Kg Is a Kg), and 5 seems to be course specific.

Speed and velocity have the same magnitude and when an object is moving it has direction thus you can create a vector for an object which is usually represented by an arrow pointing in the direction with the length of velocity. Now when force is applied to the object that force has a direction and a magnitude so that is a second vector working on the object. But force equals mass times acceleration so you would represent the force vector magnitude in terms of acceleration or force over mass.

At this point you have an object with two arrows one representing the initial state and another changing that state. (remember acceleration changes velocity) If you resolved the two vectors over time you would have snapshots of where the object would be. This is my best guess as to what 5 is all about.

Answer 3

1. a)
2. a)
3. a)
4. c)

Motion = speed
speed + direction = velocity
change in velocity over time = acceleration
acceleration * mass = force