Auniform beam 4 meters long with a mass of 40 kg is mounted to a wall by a hinge as shown in the figure. a cable, which holds this beam in position, makes an angle of 30 degrees to the beam and is attached to the beam at a point 3 meters from the wall. this beam then holds up a sign from its end with a mass of 100kg. find the force of tension on the cable and the vertical and horizontal components of the force exerted by the hinge on the beam.

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

The force it would take to accelerate an 900-kg car at the rate of 6m/s2