Interim 3 Flashcards
Science
What is the formula for kinetic energy?
Kinetic energy is calculated using the formula KE = 0.5 * m * v^2, where m is mass and v is speed.
True or False: Kinetic energy increases with the square of the speed.
True
Fill in the blank: The unit of mass in the International System of Units (SI) is ______.
kilogram
What is Newton’s first law of motion?
An object at rest stays at rest and an object in motion stays in motion unless acted upon by a net external force.
What does the sum of forces equal according to Newton’s second law of motion?
The sum of forces equals mass times acceleration (F = m * a).
Multiple Choice: Which of the following is a unit of speed? A) m/s B) kg C) J
A) m/s
What is the impact of doubling the speed of an object on its kinetic energy?
Doubling the speed increases the kinetic energy by a factor of four.
Fill in the blank: The law of action and reaction is described by Newton’s ______ law.
third
True or False: An object’s mass affects its acceleration when a force is applied.
True
What happens to the kinetic energy of an object if its mass is tripled while keeping speed constant?
The kinetic energy triples.
Define ‘collision’ in the context of physics.
A collision is an event where two or more bodies exert forces on each other for a relatively short time.
Multiple Choice: In a perfectly elastic collision, what is conserved? A) Kinetic energy B) Momentum C) Both A and B
C) Both A and B
What is the acceleration of an object if a force of 10 N is applied to a mass of 2 kg?
The acceleration is 5 m/s².
Fill in the blank: The momentum of an object is the product of its mass and ______.
velocity
True or False: The speed of an object is a vector quantity.
False
What is the relationship between force, mass, and acceleration?
Force equals mass multiplied by acceleration (F = m * a).
Multiple Choice: Which of the following best describes inertia? A) The tendency of an object to resist changes in motion B) The force acting on an object C) The speed of an object
A) The tendency of an object to resist changes in motion
What is a perfectly inelastic collision?
A collision in which the two objects stick together after colliding and move as one mass.
Fill in the blank: The total kinetic energy before a collision is equal to the total kinetic energy after a collision in a ______ collision.
perfectly elastic
True or False: The acceleration due to gravity is approximately 9.8 m/s² on Earth.
True
What is the formula for calculating momentum?
Momentum is calculated using the formula p = m * v, where p is momentum, m is mass, and v is velocity.
Multiple Choice: Which law describes the relationship between force and motion? A) Newton’s First Law B) Newton’s Second Law C) Newton’s Third Law
B) Newton’s Second Law
What is the effect of mass on the acceleration of an object for a given force?
Greater mass results in lower acceleration for the same applied force.
Fill in the blank: The unit of force in the SI system is the ______.
Newton
