The biceps brachii inserts into the radius at an angle of 90 degrees at a distance of 0.025 meters from the elbow joint. How much force must the biceps exert to produce an angular acceleration at the elbow of 3.17 rad/sec2, if the mass of the arm and hand is 5.5 kg, and the radius of gyration is 0.24 meters

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .