A football player pushes a tackling dummy forwards at a constant speed for 111m using 7150J of energy.

b)What is the frictional force the dummy exerts?

c)What work is done by friction as the dummy is slid along the field for 11m?

omg please help I am so lost

To find the frictional force that the dummy exerts, you need to use the work-energy theorem. According to the work-energy theorem, the work done on an object is equal to the change in its kinetic energy.

b) First, calculate the initial and final kinetic energy of the dummy using the energy given. The work done on the dummy is equal to the change in its kinetic energy. Since the dummy is pushed at a constant speed, the initial and final kinetic energies are the same. Therefore, the work done on the dummy is zero.

Since no work is done on the dummy, it means that the frictional force is equal to zero. This implies that there is either no friction acting on the dummy or the force applied by the football player exactly balances the force of friction.

c) To find the work done by friction as the dummy is slid along the field for 11m, you need to know the magnitude of the frictional force acting on the dummy. Since we determined in part b) that the frictional force is zero, the work done by friction is also zero.

In summary:
b) The frictional force the dummy exerts is zero.
c) The work done by friction as the dummy is slid along the field for 11m is also zero.