Astudent uses a spring to launch a marble vertically in the air . the mass of the marble is 0.002kg and when the spring is stretched 0.05m it exerts a force of 20n. what is the maximum height the marble can reach ?

Mrs. smith does her daily chores. she walks 5 m to the laundry room and then turns around and walks -14 m to the kitchen. the whole process takes her 11 minutes. what was her average velocity for these events? (choose more than 1) a. 1.48 m/s b. 0.212 m/s c. -0.136 m/s d. -0.0075 m/s