Magnitisum
What sides of a magnet attract?
North and South
What is newton's third law?
Newton's third law states that for every action there is an equal and opposite reaction.
What is gravitational Forces?
Pulls objects with mass toward each other.
Which of the following correctly describes the relationship between kinetic energy and the mass of an object?
a. Kinetic energy decreases as mass increases
b. Kinetic energy increases as mass increases
2. The farther you pull back the spring in the pinball machine, the ___________ the ball will travel when released.
B) Faster and farther
True or False
Do opposite sides of a magnet repel?
False
How does newton's third law work?
for every action there is an equal and opposite reaction.
What is gravitational field?
A student rides a bicycle at different speeds. How would the kinetic energy of the bicycle change as the speed increases?
b. Kinetic energy increases as speed increases
If you want to increase an object’s potential energy, what two things could you change?
B) Increase its height and mass
The tendency to pull other objects toward it.
Attraction
What is the strongest bridge design?
Triangle
When rolling different sizes of rocks downhill, how would the kinetic energy of the rocks be affected by their mass?
b. Kinetic energy increases as mass increases
Imagine you are at a playground with a slide. At what point on the slide does your kinetic energy increase while your potential energy decreases?
B) As you begin to move downward from the top of the slide
Tendency to push other objects away from it.
Repulsive
What is gravity?
Gravity is the force by which a planet or other body draws objects toward its center.
Samantha is hit by a wiffle ball at 5 m/s and a tennis ball at 10 m/s. How does the kinetic energy of the wiffle ball compare to that of a tennis ball?
b. The kinetic energy of the tennis ball is greater than the kinetic energy of the wiffle ball
In a pinball machine, when you pull back the lever with the spring to shoot the ball, you are storing __________ energy in the spring
C) Elastic potential energy
_______________ run on electricity and they are only magnetic when the electricity is flowing
electromagnet
What is Force?
A force is a push or pull upon an object resulting from the object's interaction with another object.
John measures the kinetic energy of a moving object. Which of the following properties does he need to know in order to calculate the kinetic energy accurately?
a. Mass and speed of the object
A system of objects can contain both _______________ energy and ______________ energy
A) Gravitational; chemical
B) Kinetic; potential
C) Thermal; electrical
D) Elastic; nuclear
B) Kinetic; potential