Which of the following is most likely to happen when a plate carrying oceanic crust collides with a plate carrying continental crust?
a. the denser oceanic plate gradually sinks into the mantle and melts.
b. the less dense continental plate gradually sinks into the mantle and melts.
c. both the oceanic and the continental plates sink into the mantle and melt.
d. the plates collide and mantle convection stops.

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photocells convert light energy to electricity

hypothesising or postulating

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.