Aplace kicker kicks a football at an angle of 30 degrees, at what angle will the football hit the ground? a.) 90 degrees b.) 30 degrees c.) 60 degrees d.)20 degrees

What is the coefficient of kinetic friction μk between the block and the tabletop?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

1. explain how you calculate the net force in any direction on the box. 2. suppose an upward force of 15n is added to the box. what will be the net vertical force on the box? 3. what force could be applied to the box to make the net force in the horizontal direction zero? explain. 4. suppose a force of 25n to the right is added to the box. what will be the net force to the right?