Freddy frog takes a dive from a bridge 53.0 m above a
river. freddy is an expert and can streamline himself to avoid
windresistance. how long will it take him to reach his
aquatichomeland?

It will take him 3.29 s to reach his aquatic homeland

Explanation:

From the equation of motion,

S = ut + 1/2gt² Equation 1

Where S = Height, u = initial velocity, g = acceleration due to gravity, t = time.

Note: For a falling body, u = 0 m/s.

S = 1/2gt² Equation 2

Making t the subject of the equation

t = √(2S/g) Equation 3

Given: S = 53.0 m,

Constant: g= 9.8 m/s²

Substituting these value into equation 3

t = √(2×53/9.8)

t = √(106/9.8)

t = √10.82

t = 3.29 s

Therefore it will take him 3.29 s to reach his aquatic homeland

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.