Please Help. Leanne does 12.3 kJ of work dragging a wooden crate 22.0 m across a floor at a constant speed. She pulls the rope at 38 degrees with the horizontal. a. What force does the rope exert on the crate? (2 pts)

b. Find the force of friction acting on the crate. (4 pts)

c. How much energy is transformed by the force of friction between the floor and the crate? (3 pts)

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

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.

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answer(20) psi;