Unit D Test Flashcards
True or False: All objects at all times on earth have forces that are being exerted on them?
True.
Which best describes a reference point?
a fixed point that helps us detect motion.
Which type of force occurs when you rub your hands together?
Friction.
What is a force?
A push or pull on an object.
Name 3 non-contact forces
Gravity, magnetism, and electrical force.
How do we know an object has moved?
An object that has changed its distance according to its reference point.
What type of force counteracts gravity? (keeps you from falling through your chair)
Normal force.
True or False: The more mass an object has, the more force is needed to get the object to move?
True.
True or False: Gravity gets stronger the further you move two objects away from each other?
False.
Which type of force keeps you from flying into space?
Gravity.
Thomas is driving his car for 5m over 5 seconds. What is his speed?
1m/s
Name four contact forces.
Friction, muscular force, normal force, and buoyancy.
What is Newtons 1st law?
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
What is Newton’s 2nd law?
The acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
What is Newton’s 3rd law?
Each action has an equal and opposite reaction.
