An ogre has a mass of 1000 kg and tries to walk across an 8 m drawbridge (from the castle side). the chain supporting the bridge is attached to the wall 12 m above the bridge and to the bridge at the point 5 m from the castle.
the ogre stands 1 m from the end of the bridge, and the bridge itself is 20 degrees below the horizontal.

if the bridge itself is 2000 kg, what is the tension in the chain?

a

15000 n

b

35500 n

c

25500 n

d

45000 n

What term do psychologists use to designate our personal awareness of feelings, sensations, and thoughts?

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?