Me asap! i need really badly! i ahve marked some questions but i am not sure about them! double check your own answers to make sure they are correct!
question 1(multiple choice worth 3 points)

(01.01 lc)

what happens to the gravitational force exerted by one object on another when the mass of the objects is doubled?

the gravitational force increases.
the gravitational force remains the same.
the gravitational force reduces by half.
the gravitational force becomes one-fourth.

question 2(multiple choice worth 3 points)

(01.01 lc)

which statement is always true about objects which exert gravitational force on each other?

they have mass.
they have speed.
they are a very large size.
they exist only in outer space.

question 3(multiple choice worth 3 points)

(01.01 lc)

which of the following draws two objects with mass towards each other?

density
gravity
pressure
temperature

question 4(multiple choice worth 3 points)

(01.03 lc)

which of the following forces can make a ball move?

a balanced force
an unbalanced force
equal and opposite forces along a horizontal plane
equal and opposite forces along a vertical plane

question 5(multiple choice worth 3 points)

(01.03 mc)

the figure shows four forces exerted on a box.

a square is shown with an arrow pointing up labeled f3, an arrow pointing right labeled f1, an arrow pointing down labeled f4 and an arrow pointing left labeled f2

if the box moves up, which statement is correct?

f1 is equal to f2 and f3 is greater than f4.
f1 is equal to f2 and f4 is greater than f3.
f3 is equal to f4 and f1 is greater than f2.
f3 is equal to f4 and f2 is greater than f1.

question 6(multiple choice worth 3 points)

(01.03 mc)

the forces exerted on an object are shown.

a box has an arrow pointing right labeled f and an arrow pointing left labeled 8 n.

if the object moves left, which statement is correct about force f?

it is equal to 8 n.
it is equal to 10 n.
it is less than 8 n.
it is greater than 10 n.

question 7(multiple choice worth 3 points)

(01.03 lc)

in 1687, sir isaac newton published his famous book describing gravitational law. which statement is correct about gravitational law?

it is a scientific law.
it is a societal law.
it is made by a government.
it is changed at regular intervals.

question 8(multiple choice worth 3 points)

(01.03 mc)

read the following statement:

for every action, there is an equal and opposite reaction.

does the statement describe a scientific law?

yes, because it describes action-reaction force pairs
no, because it describes action-reaction force pairs
yes, because it is applicable to a single or only a few events in the natural world
no, because it is applicable to a single or only a few events in the natural world

question 9(multiple choice worth 3 points)

(01.03 lc)

which scientific law describes the observation that energy cannot be created or destroyed?

law of universal gravitation
law of conservation of energy
newton's first law of motion
newton's third law of motion

question 10(multiple choice worth 3 points)

(01.03 lc)

what do kepler's laws describe?

the creation of matter
the destruction of matter
the opposite reaction to every action
the motion of the planets around the sun

question 11(multiple choice worth 3 points)

(01.04 lc)

which of the following best defines velocity?

it is an object's speed at a specific point in time.
it is the total distance traveled over the total time.
it is the speed of an object in a specific direction.
it is a measure of how far an object moves in a certain time.

question 12(multiple choice worth 3 points)

(01.04 mc)

meg ran 100 meters in 7.8 seconds. linda ran 100 meters in 14.5 seconds. which statement is correct?

linda's speed was faster than meg's speed.
linda's speed was slower than meg's speed.
linda and meg traveled the same distance at the same rate.
linda and meg traveled the same distance over a certain time.

question 13(multiple choice worth 3 points)

(01.06 lc)

which factor affects kinetic energy but not potential energy?

mass
velocity
elasticity
height

question 14(multiple choice worth 3 points)

(01.06 mc)

read the following list of objects:

a flying insect, a stretched elastic band, a falling stone, a flowing river, a coiled spring

which of the objects have only potential energy?

a flying insect, a coiled spring
a stretched elastic band, a coiled spring
a falling stone, a flying insect
a flowing river, a flying insect

question 15(multiple choice worth 3 points)

(01.06 mc)

a book is placed on a table and a rock sits on top of a cliff.

which statement is correct?

both the book and the rock have kinetic energy.
both the book and the rock have potential energy.
the book has potential energy and the rock has kinetic energy.
the book has kinetic energy and the rock has potential energy.