Cp2 forces and motions Flashcards
What are force arrows
Force arrows are arrows that represent the magnitude and direction of forces in a diagram. The arrowhead shows the direction of the force.
What is a resultant force
A resultant force is the combination of two or more forces that act on an object at the same time. It is equal to the sum of all the individual forces and is in the direction of the strongest force.
How do you calculate a resultant force
To find the resultant force you need to subtract the overall magnitude of the smaller force in one direction from the magnitude of the larger force in the opposite direction.
What are balanced forces
Balanced forces are two overall forces that act on an object in opposite directions and are equal in magnitude.
If the forces on an object are balanced, will the object stop moving
If the forces on an jobject are balanced. the motion of the object they are acting on remains unchangeg, meaning they are at rest still or constant velocity
what is a non-zero resultant force
A non-zero resultant force is a resultant force that is not balances
what is the effect on a non-zero/unbalanced resultant force on a sationary and moving objects
A non-zero resultant force will cause a stationary object to accelerate in the direction of the force, while a moving object will have its direction and speed of motion changed by the force.
What is newtons first law
Newton’s first law ;also known as the law of inertia states that an object at rest will remain at rest, and an object in motion will remain in motion in a straight line at a constant speed, unless acted upon by an external force.
https://www.educationquizzes.com/gcse/physics/forces-circular-motion/
https://www.educationquizzes.com/gcse/physics/forces-circular-motion/
what is mass
Mass is a physical property of a body or object, equal to the amount of matter it contains. It is measured in kilograms (kg)
what is weight
Weight is a measure of the force of gravity on an object. It is measured in Newtons (N)
what is the difference between mass and weight
Mass is scalor and weight is vector, meaning that weight has direction (towards the planet/downwards). Mass is always the same, regardless of where an object is located, while weight changes depending on the gravity of the environment.
How do you calculate weight
Weight = Mass x Gravitation field strength / W=mg
what is the gravitational field strength of earth
10n/kg
What is newtons second law
the greater the mass the greater the force of attraction
what is the equation for newtons second law
force = mass x acceleration / f=ma
What is intertial mass
Inertial mass is a measure/tendancy of an object’s resistance to being accelerated by a force.
WHAT is INERTIAL mass measured in
Kgm/s
what is terminal velocity
Terminal velocity is the fastest speed an object can reach while falling air or water, due to the drag force of the air or water.
A person is on the ground, their weight is equal to the upward force from the ground, the forces are ________.
Balanced
Whenever forces are unbalanced, the person or object will
Accelerate or deccelerate
What is newtons third law
Newton’s Third Law states that for every action/force, there is an equal and opposite reaction/force.
what is an equilibrium state
In physics, an equilibrium situation is one in which the sum of all forces acting on a system is zero and the system is in a state of unchanging motion.
What is the equation for momentum
momentum = mass x velocity / P=MV
Is momentum a scaler or vector quantity
Momentum is a vector quantity
What is the conservation of momentum principal
Total momentum before collision = Total momentum after`
When two objects hit eachother and they both travel in one direction together due to momentum, what happens to their mass
the mass combines
what is momentum measured in
Kgm/s
what is the second equation for momentum
𝐹 Δ𝑡 = Δ𝑝
what is work done
work done is the quantity of energy transferred by the force to move an object
What is the equation for work done
Work done = force x distance / W=FD
What is the equation for kinetic energy
Kinetic energy = 1/2 x mass x velocity squared / KE = 1/2MV^2
What are some factors that can affect kinetic energy
Mass, velocity
How do you calculate breaking distance
Breaking distance = 1/2 x (inital velocity)^2/acceleration
