p2 Flashcards
What is the difference between a scalar and vector quantity? Give 2 examples of each
Scalar quantities only have magnitude, like temperature and time.
Vector quantities have both magnitude and direction, like velocity and force.
Define acceleration in terms of velocity
Acceleration is the rate at which velocity changes over time. It measures how quickly an object’s velocity is changing.
Explain why an object travelling in a circle ar constant speed in accelerating
Even though the object is moving at a constant speed, its change in direction in circular motion causes it to accelerate.
Describe an experiment to investigate the acceleration of a trolley down a ramp
Sure! To investigate the acceleration of a trolley down a ramp, you can set up an experiment by placing a ramp at an angle and attaching a trolley to a string connected to a pulley. Measure the time it takes for the trolley to roll down the ramp and calculate its acceleration using the equation a = (2s) / (t^2), where s is the distance traveled and t is the time taken.
How is the speed of an object found from its distance time graph
To find the speed of an object from its distance-time graph, you can calculate the slope of the graph. The slope represents the rate of change of distance over time, which is the object’s speed.
What does the foat section of a velocity time graph represent
The flat section of a velocity-time graph represents a constant velocity or steady speed. It means that the object is moving at a consistent rate without any changes in its velocity.
How is the distance travelled by an object found from its velocity time graph
you can calculate the area under the graph, which represents the total distance covered by the object.
What is meant but the result force acting on an object
the overall force that is produced by combining all the forces acting on the object. It determines the object’s motion and can cause it to accelerate, decelerate, or change direction.
What will happen to an object that has zero resultant force
If an object has zero resultant force, it will either remain at rest or continue to move at a constant velocity.
What will happen to an object that has a non zero resultant force
If an object has a non-zero resultant force, it will experience acceleration or deceleration depending on the direction and magnitude of the force.
What is newtons first law?
Objects tend to stay at rest or in motion unless acted upon by an external force.
Give the equation for newtons second law
Force = mass x acceleration
Explain how a car is moving with a constant driving force will reach terminal velocity
If a car is moving with a constant driving force, it will continue to accelerate until the air resistance (drag) force becomes equal to the driving force. At this point, the car will reach its terminal velocity, where the net force acting on it becomes zero and it no longer accelerates.
What is inertia
Inertia is when objects keep doing what they’re already doing unless something changes it.
What is newtons third law gove an example of it in action
Newton’s third law states that for every action, there is an equal and opposite reaction. For example, when you push against a wall, the wall pushes back with an equal amount of force.
