Chapter 6: Forces and Motion Flashcards
(17 cards)
A push or pull the acts on an object
Force
The tendency of an object to resist any change in motion.
Inertia
A force that acts at a distance.
Non-contact force
The rate at which the speed or direction of motion of an object changes over time.
Acceleration
A force that requires two pieces of matter to touch.
Contact force.
The force of attraction between any two objects.
Gravity
The force that results when two materials rub against each other or when their contact prevents sliding
Friction
What describes how acceleration, mass, and force are related
Newton’s second law of motion
Newton’s second law of motion says..
This means that the same force will cause an object with small mass to accelerate more than an object with large mass
The greater the mass of the object, the smaller its change of motion will be for a given force.
What law states that when one object exerts a force on a second object, the second object exerts a force on the first?
Newton’s third law of motion
Who is considered one of history’s greatest scientists?
Hint: he invented a telescope that worked with mirrors instead of lenses
Isaac Newton
What law says that an object will stay in uniform motion unless a net force acts on the object?
Newton’s first law of motion
Due to inertia, objects tend to __________ changes in motion.
Resist
A car runs out of gas while moving forward on a flat, straight road. The car keeps rolling for a while because…
A. gravity pulls it forward
B. it still has a force
C. it has acceleration
D. it has inertia
A force of 20 N accelerates a 2 kg object. How much force is needed to give the same acceleration to 20 kg object?
A. 10 N
B. 10 kg
C. 200 N
D. 400 kg
A drummer hits a drum with a drumstick. The drumstick exerts a force on the drum. The reaction…
A. is stronger than the action
B. changes the motion of the drumstick
C. drives the drum forward
D. creates inertia
Which of the following is a contact force?
A. friction
B. magnetism
C. gravity
D. electricity
