P 1 kinetic energy stores Flashcards
What is kinetic energy?
Kinetic energy is the energy an object possesses due to its motion.
What is the formula for calculating kinetic energy?
The formula for kinetic energy (KE) is KE = 1/2 mv², where m is mass and v is velocity.
True or False: Kinetic energy depends on the mass of an object and its speed.
True.
If an object’s mass is doubled, how does its kinetic energy change when speed remains constant?
The kinetic energy doubles.
Fill in the blank: The unit of kinetic energy is ______.
Joules.
What happens to kinetic energy if the speed of an object is tripled?
The kinetic energy increases by a factor of nine.
What is the relationship between kinetic energy and velocity?
Kinetic energy is proportional to the square of the velocity.
Multiple choice: Which of the following factors does NOT affect kinetic energy? A) Mass B) Velocity C) Shape D) Speed
C) Shape.
True or False: Kinetic energy can be converted to other forms of energy.
True.
What is the kinetic energy of a 2 kg object moving at a speed of 3 m/s?
The kinetic energy is 9 Joules.
Fill in the blank: An object at rest has ______ kinetic energy.
zero.
How does increasing the mass of an object affect its kinetic energy if the speed is constant?
Increasing the mass increases the kinetic energy.
What is the effect of friction on kinetic energy?
Friction can convert kinetic energy into thermal energy, reducing the kinetic energy of the object.
Multiple choice: The kinetic energy of an object is directly proportional to which of the following? A) Mass B) Velocity squared C) Both A and B D) None of the above
C) Both A and B.
True or False: Kinetic energy is a scalar quantity.
True.
What happens to the kinetic energy of an object if its speed is halved?
The kinetic energy is reduced to a quarter.
Fill in the blank: Kinetic energy is stored in the ______ of moving objects.
motion.
What is the kinetic energy of a 5 kg object moving at 4 m/s?
The kinetic energy is 40 Joules.
True or False: Kinetic energy is independent of the direction of motion.
True.
What type of energy does a moving car have?
Kinetic energy.
Multiple choice: Which of the following increases kinetic energy the most? A) Increasing mass B) Increasing speed C) Both A and B D) None of the above
C) Both A and B.
How is kinetic energy related to work done on an object?
Work done on an object results in a change in its kinetic energy.
What is the kinetic energy of a 10 kg object moving at 2 m/s?
The kinetic energy is 20 Joules.
Fill in the blank: The kinetic energy of an object is zero when its ______ is zero.
velocity.
True or False: A heavier object moving at the same speed as a lighter object has more kinetic energy.
True.
