A bus that was moving at a high speed stopped suddenly. One of the passengers claimed that a heavy object moved back and hit him in the
face. He claimed that the bus driver did not follow the appropriate safety
rules.

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Ain is , is 's of ? 0.62 0.79 1.27 1.50