7. Twiddle-Dum and Twiddle-Dee sit balanced on a teeter totter type device. One of them, who's mass is 45.2 kg, is 1.30 m from the point of balance. The other is 2.15 In from the point of balance. What is the mass of the second person? Now for the good Torque Stuff 8. A uniform beam of weight 254 N sticks out from a vertical wall. A lightweight cable connects the end of the beam to the wall, making an angle of 650" between the beam and the cable. (a) What is the tension in the cable? (b) What is the force exerted on the beam by the wall? 9. A uniform 225 N ladder leans against a smooth vertical wall. The ladder is 9.00 m in length. It makes an angle of 780 with the deck. A 65.0 kg Bengal tiger rests on one of the rungs 3.00 m from the top end of the ladder. (a) Find the force of friction exerted by the deck on the bottom of the ladder. (b) What is the upward force exerted on the ladder