10. [1pt] A painter wishes to know whether it is safe to stand on a ladder. The ladder has a mass Mi = 14.0 kg which is uniformly distributed throughout its length _ = 9.00 m. The ladder is propped up against a wall, at an angle 0 = $5. The coefficient of static friction between the ground and the ladder is u, = 0.39. while the wall is frictionless. Calculate the maximum mass of the painter for which the ladder will remain stable when he climbs a distance d = 5.4 m up the ladder. Answer: Submit All AnswersO 9. [1pt] A four year old boy had to be admitted to hospital after tipping over a large television set which landed on his head. He had been pulling himself up, holding on to a ledge at the front of the TV stand, when the accident happened. The boy spoke a few words, then lost consciousness. He had to spend three months in hospital and was still suffering from significant neurological deficits afterwards. Assume a TV stand that is h = 81.0 cm high and d = 50.0 cm deep, with a mass of 10.0 kg, and a centre of mass at its geometric centre. The TV set has mass 10.0 kg; it rests on top of the stand, with its centre of mass c = 15.0 cm back from the edge. The boy's mass is 14.1 kg, and his centre of mass is b = 58.2 cm away from his heels. If the boy was holding on to the top of the stand, with his toes pressed against the base, leaning straight back, what is the maximum angle of the boy's body (and legs) with respect to the vertical without the TV stand tipping over? Enter units for theta in degrees as: deg Answer: Submit All Answers Not yet correct, tries 1/1511. [1pt] A 22.6 kg beam is attached to a wall with a hinge and its far end is supported by a cable such that the angle between the beam and the cable is 90. If the beam is inclined at an angle of theta = 14.7 with respect to horizontal, what is the magnitude of the horizontal component of the force exerted by the hinge on the beam? 90' Answer: Submit All Answers