Week 6

A projectile motion in softball occurs after the ball makes contact with the bat. It launches from the bat to some place out on the field. The ball explodes off the bat with a decrasing velocity until it hits the ground and comes to a complete stop. Another example of projectile motion is when someone pushes you and you are standing in a stationary potsition. Your velocity changes from 0 to how ever the amount of force was used by a person to push another.

1. This roller coaster explodes form a intial velocity of 0 to 150 m/s. What is the displacement within 8 seconds of the roller coaster if the roller coaster is moving upward at a 90 degree angle from the ground?

2. An arrow is fired 50 m into the air. How fast is the arrow noving when it reaches its furthest distance it can travel?

0 m/s

3. What is the forlmula for determining the velocity of an object when givin its diameter and time use to travel the average distance?

v= displacement/time

Week 5

Car B going 60 mph off the cliff beacause the engine of the car would be running and would cause the explotion. Car B would also have more velocity and the fall of the crash from the cliff would mean that its fall to the ground would have close velocity to the speed the car was driving. The speed and acceleration that the car is traveling at would result in a harder fall than if it were to just fall from a cliff of run into a wall.



An apple hits the ground after falling from a tree. The distance from the branch to the tree is 4m. What is the amount of time that it takes to fall from the branch to the ground.



A jogger accelerates from rest to a velocity of 37 cm/s. If the displacement of the jogger from where it started to accelerate her acceleration was 25mm. What is the acceleration of the jogger?

(a) Identify the times at which the velocity is 0.

(b) Find the acceleration from 0-25s.

(c) What is the displacement from 0-50s?



Week 4

When walking from point A to point B and retaining a constant speed you don't use acceleration, only velocity. If you are at a constant speed you never use acceleration.  In a situation that you would only use acceleration would be in a 100m dash. You wouldn't want to retain the same speed in a sprint race, you want to continue to get faster and accelerate your speed until you reach the finish line.

1. What indicates the rate of change?
2. What term is used to show a rate in which displacement changes with time?
3. Slope = ?

Week 3

Acceleration is more important when you are running a 200 meter dash. You need to speed up from your initial velocity to your final velocity in order to win the race. The more you can accelerate the better of the chance you have of winning. If you are being timed to run a mile and your coach wants you to have similar speeds every time, velocity is a better. The more consistent you are with having the same speed every lap around the track, the more consistent your mile times are going to be.


1. When finding the area on a graph it determines the what?
2. What are three ways you can accelerate?
3. A constant speed represents?