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In I/GCSE Physics, do you guys still remember what projectile is?
Projectiles
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/126457_125787.png)
ACCELERATION IN THE EARTH’S GRAVITATIONAL FIELD
In I/GCSE Physics,
- Projectile – a force acts on an object which starts it moving then it is subject to a constant force while it moves. In most cases this means the object is in free fall in the earth gravitational field.
- An object dropped accelerates vertically downward due to its weight.
- Air resistance affects the motion of objects unequally, according to their cross-sectional area
- Acceleration due to gravity: g (Nkg-1 and ms-1)
g=9.81ms-1
- If the projection is at an angle, resolve the forces to be horizontal and vertical. The SUVAT equations used must be separated to HORIZONTAL and VERTICAL.
- Notes: if throwing a ball up vertically, the final velocity will be 0 ms-1 at the top of its trajectory.
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/297531_994441.png)
- The vertical motion is subject to gravity, so -g
- The time for the vertical and horizontal motion is the same.
That's all~ Thanks for watching.
![broken image](http://custom-images.strikinglycdn.com/res/hrscywv4p/image/upload/c_limit,fl_lossy,h_9000,w_1200,f_auto,q_auto/4936730/302555_611076.png)