Physical Sciences 12a Lecture 9: Lecture 9

An object has a kinetic engery of 275J and a momentum of magnitusde 25.0 kg*m/s. Find th speed and the mass of the object.

Which of the following objects has the greatest kinetic energy?

a) An object with a mass of 4m and a velocity of v.

b) An object with a mass of 3m and a velocity of 2v.

c) An object with a mass of 2m and a velocity of 3v.

d) An object with a mass of m and a velocity of 4v.

An object of mass M oscillates on the end of spring. To double the period, replace the object with one of the mass.

(a) 2M

(b) M/2

(c) 4M

(d) M/4

(e) none of these.