Friction acts in a direction __________________ to the direction of an object's motion.
What is opposite.
100
This is the tendency of an object to resist a change in motion.
What is inertia.
100
Newton's 3rd law states that if one object exerts a force on another object, then the second object exerts a force of _____________ strength in the ______________ direction on the first object.
What is equal and opposite.
100
This is any object that orbits another object in space.
What is a satellite.
200
Forces can be added together only if they are acted on ________________ objects.
(same or different)
What is same
200
This is the type of friction that occurs when a solid object moves through air or liquid.
What is fluid friction.
200
True or False: According to Newton's second law of motion, acceleration increases as force increases, if mass stays the same.
What is True.
200
The momentum of an object depends on its mass and ______________ .
What is velocity.
200
A(n) ____________________ causes objects to move in a circle.
What is centripetal force.
300
This can cause an object's motion to change.
What is unbalanced force
300
Weight is the measure of the force of _______________ on an object.
What is gravity.
300
If force = mass x acceleration, what does acceleration equal?
What is acceleration = net force/mass.
300
The formula for momentum is:
What is momentum = mass x velocity.
300
A satellite in orbit around Earth is always ______________ toward Earth.
What is falling.
400
Equal forces acting on one object in opposite directions are called:
What are balanced forces.
400
An object in free fall ________________ until it reaches terminal velocity.
What is accelerates.
400
A 10 kg ballistic accelerated 500 m/s2 by a force of:
What is 5000 N.
400
The momentum of a 2500 kg car traveling at a velocity of10 m/s is:
What is 25,000 kg x m/s.
400
The force of ______________ acts between all objects in the universe.
What is gravity.
500
What is the net force of two balanced forces, both exerting a force of 6 N.
What is zero or no net force. The balanced forces cancel each other out so the object does not move.
500
True or False: The force exerted by gravity is stronger if two objects are closer.
What is True.
500
The unit of force, a newton, is equal to:
What is kg x m / s2.
500
True or False: The unit used to measure momentum is newton.
What is False (it is kg x m / s).
500
How do rockets lift off?
What is a rocket can rise into the air because the gases it expels with a downward action force exert an equal but opposite reaction force on the rocket.