PHYSICS W5

What is the learning outcome related to the problem of rotational motion of a rigid body?

• Tangential and Centripetal Acceleration

• Mechanical Machine

• Equilibrium

• Translation –Rotational Analogy

What are the 5 steps for solving a translational equilibrium problem?

• Find the rope tension at A and B

• Identify and draw all forces acting on the point of equilibrium

• Decompose all forces into their x and y component

• Solve the coupled equations using a regular math

What causes the rotational motion to change?

• Tangential force

• Net external force

• Net external torque

• Centripetal force

What is the ideal mechanical advantage of a single fixed pulley?

• 2

• 3

• 1

• 0.5

What is the efficiency of a system if the ideal mechanical advantage is 4 and the actual mechanical advantage is 2?

• 1

• 0.5

• 2

• 4

What is the torque produced by the Achilles muscle if the total force is 720 N and the distance between the axis and the point of stretching is 3.6×10^-2 m?

• 790 N

• 850 N

• 700 N

• 650 N

What is the maximum mass of Dumbbell allowed if the deltoid muscle produces a force of 1840 N and the total weight of the arm is 31.0 N?

• 1.86 kg

• 2.0 kg

• 2.5 kg

• 1.5 kg

What is the center of gravity of an arm consisting of three parts, an upper arm (17 N), a lower arm (11 N), and a hand (4.2 N)?

• 2.0 m

• 1.5 m

• 2.4 m

• 3.0 m

What is the problem related to the blades of an electric blender whirling with an angular velocity of +375 rad/s?

• Pure translational motion

• General motion of a rigid body

• Tangential and Centripetal Acceleration

• Equilibrium

What is the mechanical advantage of a single movable pulley?

• 3

• 1

• 0.5

• 2