2. rocks that are tossed around in the ocean (salt water) will eventually wash up
on shore. rocks and pebbles in a river bed will often be eroded by running water
and deposited at the end of the river. which is true of the appearance of the rocks
and pebbles?
a. the rocks and pebbles will be rough and jagged
b. the rocks and pebbles will be smooth and rounded
c. the rocks and pebbles will be uneven and smooth
d. the rocks and pebbles will be rough and rounded
which of the following sentences is correct

increases it

measuring things 1 litre of water

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it