You want to use a rope to pull a 109kg box up a plane inclined 30° above the horizontal. the coefficient of kinetic friction is 0.42. if the rope pulls parallel to the incline, what force do you need to exert on the rope to pull the box at a constant velocity?

Describe uniform velocity and variable velocity in short

Avoltaic cell converts chemical energy to

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.