Physics 1

• What is Motion?

  A change in position over time
• How to know something is in motion?

  Use a reference point!
• What causes an object to move?

  A FORCE! 😝
• What is a Force?


  A push or a pull
• vector quantity

  a quantity that has both magnitude and direction
• What is The total combination of theforces acting on an object called?


  Net Force
• Balanced Force


  net force equals ZERO 👉👌
• Unbalanced Force


  net force is NOT equal to zero 🚫👌
• Can unbalanced forces change an object's velocity?

  Yes
• Can unbalanced forces act in the samedirection?

  Yes
• Gravitational Force


  The force of attraction 😍 between all objects
• The amount of gravity depends on two things

  The objects' masses• The distance between the two objectsOr on earth, weight 🍆
• Applied Force


  a force which is applied to an object by a person or another object. Could be push pull 🍆🍑
• Normal Force


  the force perpendicular to a surface that prevents an object from falling through the surface
• Tension Force


  The force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends (gi bira from equal forces in the end..gago basta oi)
• Air resistance force


  Frictional 😳 force that acts upon objects as they travel through the air
• Friction Force

  Acts in a direction opposite to motion
• Kinetic Friction


  Friction between moving surfaces
• static friction


  Friction that acts on objects that are not moving
• Spring Force


  The force exerted by a compressed or stretched spring upon any object that is attached to it
• A projectile is any object that continues in motion by its own inertia and is influenced only by the downward force of gravity and air resistance.
• An object dropped from rest is a projectile.
• An object thrown straight upward is a projectile.
• An object thrown upward at an angle to the horizontal is a projectile.
• The path that the projectile follows is a parabola, which is called its trajectory.
• If there is no force acting on an object, it will continue moving at a constant speed in the same direction, with no change in its velocity and distance will increase the same amount with each second.
• An object in free fall is only acted on by gravity, with acceleration due to gravity being 9.8 m/s^2 and distance covered increasing with each second.
• The vertical motion of a projectile is not affected by its horizontal motion, meaning the vertical motion of a projectile is identical to an object in free fall.
• The horizontal motion of a projectile is not affected by its vertical motion, meaning the projectile will travel the same horizontal distance as it would if it were simply rolling on a flat surface in the absence of friction.
• The vertical and horizontal motion of a projectile are independent of each other.
• Projectiles which have no upward trajectory and no initial vertical velocity are referred to as horizontally launched projectiles.
• Different launch angles result in different horizontal distances traveled by the projectile.
• The same range is obtained from two different launching angles when the angles add up to 90°.
• An object launched at an angle of 60° has the same range as if it were thrown at an angle of 30°.
• What launch angle would have the same range as a projectile launched at 20°?
• Since the projectile was launched at a angle, the velocity must be broken into components.
• Tension force has the same magnitude at each end.
• Static Friction is the friction between stationary surfaces.
• The contact between an object and a surface reduces the speed of the object and releases heat.
• Gravitational Force, also known as Weight, is calculated by the formula w = mg, where m is mass and g is the gravitational acceleration of 9.8 m/s 2.