Forces And Motion Flashcards
What are the standard units used in physics for mass and distance?
kilogram (kg), metre (m)
These are the basic SI units for measuring mass and distance.
What is the formula for average speed?
average speed = distance moved / time taken
This formula helps in calculating the average speed of an object.
What is the relationship between acceleration, change in velocity, and time taken?
acceleration = change in velocity / time taken
This relationship is essential for understanding how objects speed up or slow down.
How can acceleration be determined from a velocity-time graph?
Determine the gradient of the velocity-time graph
The steeper the gradient, the greater the acceleration.
What does the area under a velocity-time graph represent?
The distance travelled
This area calculation is crucial for finding total distance when velocity is changing.
What is the formula that relates final speed, initial speed, acceleration, and distance moved?
(final speed)² = (initial speed)² + (2 x acceleration x distance moved)
This equation is also known as one of the equations of motion.
What is a vector quantity?
A quantity that has both magnitude and direction
Examples include force, velocity, and acceleration.
What is the relationship between unbalanced force, mass, and acceleration?
unbalanced force = mass x acceleration
This is Newton’s second law of motion.
What is the formula for weight in relation to mass and gravitational field strength?
weight = mass x gravitational field strength
This equation helps calculate the weight of an object based on its mass and the gravitational pull.
What factors affect the stopping distance of a vehicle?
speed, mass, road conditions, reaction time
These factors are crucial for understanding vehicle safety and stopping distances.
What is terminal velocity?
The constant speed reached by an object freely falling through a fluid
At terminal velocity, the force of gravity is balanced by the drag force.
What is Hooke’s Law?
The force exerted by a spring is directly proportional to its extension
This law is applicable within the elastic limit of the spring.
What is the formula for momentum?
momentum = mass x velocity
Momentum is a vector quantity that describes the motion of an object.
How is force related to change in momentum and time taken?
force = change in momentum / time taken
This formula is derived from Newton’s second law.
What does Newton’s third law state?
For every action, there is an equal and opposite reaction
This law explains the interaction between two bodies.
