MULTI UNIT QUESTION 1. Anthony (71 kg) does a sliding dive in a volleyball game. He starts the slide at a speed of 30 km/h ana skids
to a stop as he saves the ball from hitting the floor. The coefficient of sliding friction between Anthony and the
gym floor is 0.58
a) Calculate the work done by friction to stop Anthony using two different methods
b) Explain why the work done by friction is negative for both methods.
c) Explain how this scenario obeys the law of conservation of energy, including all types of energies
involved and any assumptions required

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okay, ima .

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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.