In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must the 50 kg athlete leave the ground in order to lift his center of mass 2.10 m and cross the bar with a speed of 0.70 m/s?
Express your answer to two significant figures and include the appropriate units.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards