When five people whose average mass is 80 kg sit down in a car, they find that the car drops 0.91 cm lower on its springs. then they get out of the car and bounce it up and down. the acceleration of gravity is 9.8 m/s 2 . what is the frequency of the car’s vibration if its mass (empty) is 3000 kg

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.

At what time will the interfering waves have an amplitudeof zero?

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward