Physics: Conversion of Units

By Monday, August 5, 2013, complete the following exercises. Be sure to show all your work.

Question 1
Select a street, road, or highway near your home and record the speed limit in mi/h. Convert the speed to m/s and km/h.

Question 2
A car is traveling at a constant velocity of 100 km/hr. What is the distance it will travel in one minute? Express your answer in meters.

Question 3
A car is initially traveling at 20 m/s when it accelerates to 35 m/s in a time of 5 seconds. What is the acceleration of the car in m/s²?

Question 4
Suppose a car's brakes can produce an acceleration of –7 m/s². If the car is traveling at an initial speed of 28 m/s, what is the minimum distance necessary to stop the car?

Question 5
A one-meter long rifle fires a bullet at a velocity of 800 m/s. What is the average acceleration experienced by the bullet when it is fired? (Hint: You need to find the time it takes the bullet to travel the length of the barrel first. The bullet is initially at rest in the rifle.)

I'm submitting my class online lectures if that helps in anyway