Echoes return in 2.5 secs to a person standing in front of a cliff. How far away is the cliff? The speed of sound in air at sea level is 343 m/s when the temp is 200 degrees celsius

For question 3 & 4: A student throws a ball vertically upward such that is travels 9.0 m to its maximum height. If the ball is caught at the initial height 2'4 secs after being thrown, What is the ball's average velocity? Find the average velocity.

7.5 m/s 0 m/s 3.75 m/s

A drag racer starting from rest accelerates in a straight line at a constant rate of 5.5 m/s^2 for 6 secs. What is the racer' velocity at the end of the given time?

Where would you place a 50 kg mass on a 75 kg 14 meters rod so that its center of mass os 1 meter to the left of the physical center of the rod?