In the y-direction:
N = mg + Fsin25°
In the x-direction:
Fcos 25° = μsN
Substitute for N in the equation in the x-direction.
A contestant in a winter sporting event pushes a 45.0-kg block of ice across a frozen lake as shown in the figure. Gine the coefficient of static friction to be μs = 0.1, and the coefficient of kinetic friction to be μk = 0.03
(a) Calculate the minimum force F he must exert to get the block moving.
(b) What is the magnitude of its acceleration once it starts to move if that force is maintained?