Force
force occurs when two objects or substances touch
The equation for finding speed
s=d/t
How many laws of motion are there?
3
Gravity is a __________ force
Pull
What is the average speed of a dog that travels 100 miles in 10 hours?
10mph
Unit of measurement for forces
Newton's (N)
Speed + direction is called
velocity
Finish the statement: An object in motion....
will remain in motion with the same speed and in the same direction unless acted on by an outside force.
Friction with the air is called this
What two forces cause a ball that is rolling on the ground to eventually come to a stop?
gravity and friction
Name two non contact forces (types)
magnetism and gravity
Acceleration is a change in
Velocity
Give an example of an action reaction pair.
answers will vary
Gravity pulls at this rate on all objects
9.8m/s2
Air pressure usually moves from _________ pressure to ___________ pressure.
High to low
When all of the forces in a situation are added together and they equal zero, describe the motion of that object.
It is at rest
What is a resistance to a change in motion called?
Inertia
Which law explains how when I turn off the ceiling fan, the fan blades continue to move for a while?
Newton's 1st Law
Are mass and weight the same thing (same term?)? Explain why or why not.
No - mass is consistent no matter what the pull of gravity. Weight is based on gravity.
Explain how there is no sucking force in science
forces are either a push or a pull - the appearance of a sucking force usually is due to and area of low and an area of high pressure
List 6 types of forces
answers will vary
What are 3 changes in velocity?
Speed up, slow down, or change direction
Two cars have the same mass. Car A accelerates much more quickly than Car B. Explain how this can be.
Car A has a higher force (likely due to a stronger engine)
When the upward force of air resistance balances out the downward pull of gravity, and object will stop accelerating in free fall. What is this called?
Terminal Velocity
What principle describes that fast moving fluids create and area of low pressure?
Bernoulli's Principle