P:5 Forces Paper 2

• Weight is a Downwards force due to gravity. • Buoyancy is a Upward force exerted on an object in a fluid.

• Friction is a Resistive Force due to 2 objects in contact. • Tension is is a force created when an object is stretched.

• Magnetic Force is a force created when 2 magnetic objects interact. • Electrostatic Force is a force crested when object have different changres.

• Magnitude means size. • Displacement is the shortest straight-line distance and direction from an object’s starting point to its ending point.

• Velocity is speed in a given direction. • Momentum is the force or speed of an object in motion or the increase in the rate of development of a process

• 1) Vector. • 2) Scalar.

• Vector is a Quantity which has both magnitude and a direction. • Scalar is a Quantity that has magnitude but no direction.

• 1) Force. • 2) Mass. • 3) Velocity. • 4) Acceleration. • 5) Displacement. • 6) Momentum.

• 1) Pressure • 2) Power • 3) speed • 4) Volume • 5) Mass

• Force is a push or a pull on an object caused by interacting with something. • Forces can be contact or non contact.

• Contact force is when 2 objects have to be touching for a force to act. • For Example: Friction ,air resistant, tension, normal contact force.

• non-contact forces are when objects do not need to be toughing for the force to act. • For example: Magnetic force, gravitation force and electrostatic force.

• When 2 objects interact a force is produced on both objects. • The force on the 2 objects are equal sizes but act in opposite directions. • these 2 forces are called an interaction pair.

• a example of an interaction force is the gravitation force between the earth and the sun. • A gravitation force acts on the earth attracting it to the sun.

• Isaac newton prospered 3 laws of motion.

• With no outside forces objects stay in 1 place or continue moving at the same speed and in the same direction.

• For a Given Mass the acceleration is proportional to The force applied. • If you double the force you double the acceleration.

• For Every action (force) there is an energy and opposite reaction (Force). • This means if you push something will push back just as hard.

• The centre of mass is a point where all the weight can be considered to act from. • To find the centre of mass you draw the lines of symmetry and when the lines intercepting that is the centre of mass.

• first make 2 point of suspension in your irregular object then hang it up on a cork screw and hang up your plum line the draw a straight line and do it aging with the other point.

• They can check if it balances on their hand.

• Resultant force is where you have to make sure the force on both sides is equal and it has a overall force.

• Resultant Force (N) = Mass (Kg) x Acceleration (m/s²)

• 1) Choose a suitable scale. • 2) Draw one of the forces at the correct angle and length. • 3) Draw the next force from the tail of the first one. • 4) Measure a suitable angle. • 5) Complete the parallelogram.