APPLICATION A trolley of mass 200g is placed on a table. A mass piece of 20g is attached to the
trolley through a string. Ignore the effects of friction

1. State Newton's scecond law
(205)
2. Sketch free-body diagrams for the trolley and the masspiece
(5)
3. Calculate the acceleration of the trolley.​

An object thrown vertically upward from the surface of a celestial body at a velocity of 36 m/s reaches a height of sequalsminus0.9tsquaredplus36t meters in t seconds. a. determine the velocity v of the object after t seconds. b. when does the object reach its highest point? c. what is the height of the object at the highest point? d. when does the object strike the ground? e. with what velocity does the object strike the ground? f. on what intervals is the speed increasing?

Explain what happens at the saturation point when adding salt to water at room temperature.

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