Imagine an object of mass M pushed by a force F, so it accelerates. Now assume the mass is changed to 3 times the original, and the net force acting on the object is 4 times the original? How many times the original acceleration does the object have now?

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

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