Question: You and your friend Peter are putting new shingles on a roof pitched at 25^\circ . You're sitting on the very top of the roof when Peter, who is at the edge of the roof directly below you, 5.2 m away, asks you for the box of nails. Rather than carry the 2.4 kg box of nails down to Peter, you decide to give the box a push and have it slide down to him.