A wood plank (length 4.8 m and mass 9.4 kg) is balanced between two saw horses, as shown in the figure below. One saw horse is positioned directly under one end of the plank, and the other is located a distance di = 3.1 m away. A child (mass 20 kg) walks along the plank, as if it were a balance beam. What is the furthest distance d2 (in meters) from the end of the plank that the child can walk before the plank tips and falls? Hint: When the plank starts to tip, one of the forces becomes zero. d2 d1

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Ant-Man is walking around on top of a wooden plank that rests atop two thin, vertical steel pillars, which are bolted into the ground. Ant-Man's mass is m₁ = 80.0 kg, but he is small enough to be treated as a point particle. The plank (m₂ = 11.7 kg) has a length of L = 2.44 m, with the left end flush against the edge of the left pillar. The separation distance between the pillars is d 1.50 m. T Suppose that Ant-Man walks far enough out from the right pillar so that the plank is just about to start rotating. What will be the magnitude of the force from each of the pillars on the plank at this time? (Hint: begin your analysis by thinking about the torques acting on the plank, and note that the forces from the two pillars are not the same.) How far out from the right pillar could Ant-Man walk before the plank starts to rotate?

A baseball bat balances 76.1 cm from one end. If a 0.500 kg glove is attached to that end, the balance point moves 26.7 cm toward the glove. $ % Part A Find the mass of the bat. mbat = Submit Provide Feedback 15. ΑΣΦ Search or type URL MacBook Pro Request Answer & 7 * 00 ? kg

A = 3 B= 9 C= 6 D = 8

A 7.1 N weight is attached 5.0 cm from the fulcrum of a balance beam. What weight should be placed 1.4 cm away from the fulcrum on the other side of the beam in order to balance the system?

A beam resting on two pivots has a length of L = 6.00 m and mass M = 77.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot placed a distance ℓ = 4.00 m from the left end exerts a normal force n2. A woman of mass m = 61.5 kg steps onto the left end of the beam and begins walking to the right as in the figure below. The goal is to find the woman's position when the beam begins to tip. (a) Use the force equation of equilibrium to find the value of n2 when the beam is about to tip. (b) Using the result of part (c) and the torque equilibrium equation, with torques computed around the second pivot point, find the woman's position when the beam is about to tip.x = (c) Check the answer to part (e) by computing torques around the first pivot point.x = (d)Except for possible slight differences due to rounding, is the answer the same for F and E?

A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 6.35 g coins stacked over the 11.5 cm mark, the stick is found to balance at the 43.4 cm mark. What is the mass of the meter stick?

A child with a mass of 11 kg sits at a distance of 1 m from the pivot point of a seesaw. Where should a 15 kg child sit to balance the seesaw?m (from the pivot point)

A tightrope walker is walking between two buildings holding a pole with length ?=15.5 m, and mass ??=19.5 kg. The daredevil grips the pole with each hand a distance ?=0.575 m from the center of the pole. A bird of mass ??=525 g lands on the very end of the left‑hand side of the pole. Assuming the daredevil applies upward forces with the left and right hands in a direction perpendicular to the pole, what magnitude of force ?left and ?right must the left and right hand exert to counteract the torque of the bird?