Lecture 5 Flashcards
What does projectile motion refer to?
Refers to the motion of an object projected into the air.
What is the difference between vertical and horizontal velocity in projectile motion?
VV is constantly changing while HV is consistent and not changing.
What does vertical velocity tell us?
Tells us the height of the projectile.
What effects the trajectory of an object.
The velocity, height and angle of release.
What shape does a projectile follow?
A palabora.
What happens if you throw something at an angle of 90 degrees?
It will land where you threw it. It will not travel a horizontal distance.
What happens when throwing an object at an angle less than 45 degrees?
There is less vertical velocity and displacement because there is less time in the air to achieve this range.
What is a critical reason for not throwing an object at an angle of 45 degrees (an optimal angle).
When the launching height and landing height are different.
Name another reason why an angle of 45 degrees is not always optimal.
If you throw at 45 degrees there is not enough time to push upward or don’t want to lose too much forward velocity.
What is the velocity at the peak of the projectile?
0 m/s
What do you never calculate in projectile motion?
The resultant vector.
Why does any two objects thrown at the same height land at the same time?
Because there is no horizontal velocity or air resistance acting on the object so only gravity is acting on the object which is the same value, -9.81 m/s2.
