In: Physics
1.) A hiker, who weighs 860 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 3220 N, and rests on two concrete supports, one on each end. He stops 1/4 of the way along the bridge. What is the magnitude of the force that a concrete support exerts on the bridge (a) at the near end and (b) at the far end?
2.) A jet transport has a weight of 1.09 x 106 N and is at rest on the runway. The two rear wheels are 17.0 m behind the front wheel, and the plane's center of gravity is 11.2 m behind the front wheel. Determine the normal force exerted by the ground on (a) the front wheel and on (b) each of the two rear wheels.
3.) A clay vase on a potter's wheel experiences an angular acceleration of 8.38 rad/s2 due to the application of a 18.5-N m net torque. Find the total moment of inertia of the vase and potter's wheel.