Answer the following grade 12 physics questions.

1. An object is pushed lrom rest across a sheet or ice accelerating at 5 \"1st Iriyln ] over a distance of 80 cm. The object slides with a constant speed for 4 seconds until it reaches a rough section, which causes it to stop in 2.5 seconds. all What is the speed of the object when it reaches the rough section? [3 marks] b] What is the object's acceleration while it is on the rough section? [3 marks] 2. A person walks 5.0 km towards the east in 2.00 h, then 1.5 km towards the west in 0.50 h, and finally 10.0 km towards the east again in 2.25 h. what is the person's average velocity? [3 marks] 1A marble rolls off a table with a velocity of 2.5 m/s [right]. The table top is 80 cm above the floor. If air resistance is negligible, determine a] How long the marble is airborne. [4 marks] b] How far away.I from the table did the marble land. [3 marks]