What is the equation use to calculate a change in velocity?
change in V=g(t)
100
What is Newton's First Law?
An object at rest remains at rest, and an object in motion remains in motion at a constant velocity unless acted upon by an unbalanced force.
100
Mass equals force times acceleration. True or false?
What is false. Force = mass time acceleration
100
For every __________ there is a _____________ and ____________ reaction.
action, equal, opposite
100
The motion of an object when only the force of gravity is acting on it.
What is free fall?
200
Give an example of the force of air resistance and explain why.
Possible Answer: A sky diver using a parachute. The parachute has more surface are.
200
Give an example of an object at rest, the unbalanced force and the motion of the object.
Possible answer: A golf ball sitting on a tee, the club hits the ball, the ball flies through the air and falls because of gravity.
200
What unit of measurement is force expressed in?
What is Newtons?
200
What is the equal action and reaction when you sit in your chair?
Your body exerts a force DOWN on the chair. The chair exerts a force UP on your body.
200
The curved path that an object follows when thrown, launched or projected near the Earth's surface.
What is projectile motion?
300
A golf ball and a bowling ball are moving at the same velocity. Which of the two has more momentum and why?
The bowling ball has more momentum because it has more mass.
300
Why do we continue to fall forward when a car quickly comes to a stop?
Inertia causes our bodies to want to continue moving.
300
Will an apple with a mass of 1 kg and a watermelon with a mass of 10 kg accelerate to the ground with the same force?
No. The watermelon will have a force of 98N and the apple with have a force of 9.8N.
300
Give an example of a force pair.
A baseball pushing a bat backwards why the ball is pushed forward; a bird's wings pushing the air down while the air pushes the bird up; a fish's fins pushing the water back as the water pushes the fish forward
300
A quantity defined as the product of the mass and velocity of an object.
What is momentum?
400
The law of conservation of momentum states that any time objects collide, the total amount of momentum changes. True or false?
What is FALSE. The momentum stays the same.
400
Describe the relationship between mass and inertia.
The more mass an object has, the more inertia.
400
What is the relationship between the force on an object and the object's acceleration?
The acceleration increases as the force increases.
400
True or false: The force of gravity between Earth and a falling object is a force pair.
What is true?
400
The rate at which velocity changes over time.
What is acceleration?
500
An acorn at rest falls from an oak tree. It takes 3 seconds for it to hit the ground. What is the acorns velocity when it hits the ground?
V = 29.4 m/s
500
What type of friction would it be if a feather is floating slowly to the Earth.
What is fluid friction?
500
Calculate the force acting on your 6kg backpack.
What is 58.8 N
500
Describe why a rocket launching applies to Newton's 3rd law.
Various fuels are burned in the engine, producing hot gases.
The hot gases push against the inside tube of the rocket and escape out the bottom of the tube. As the gases move downward, the rocket moves in the opposite direction.
500
The tendency of an object to resist changes in its velocity: whether in motion or motionless.