Vocab
the speed of an object in a certain direction
velocity
forces that you can feel toughing you are
contact forces
movement in any direction
motion
What is the difference between weight and mass?
Weight is the measure of the force of gravity on an object. Mass is the amount of matter in an object.
Which takes more energy to move: a carboard box or a large boulder? Explain using one of Newton's laws...
A large boulder because of Newton's second law
how far an object moves in a given time
speed
An example of a contact force is
friction
kicking a ball
water resistance
Give 5 examples of directions...
North, south, east, west, up, down, left, right, and more!
Explain how surface area and air resistance are related to each other?
The more surface area there is, the more air resistance their is.
What is inertia? Which one of Newton's laws helps explain this concept?
Inertia is the tendency of an object to stay at rest or in motion. Newton's first law explains this.
the tendency of an object to stay at rest or in motion
intertia
forces we can not feel touching us, but we know are there
non-contact forces
energy that hasn't been released yet
potential energy
What is friction?
Friction is a force that slows the movement/motion of objects.
How does Newton's third law relate to bouncing a basketball?
If you push air down on the basketball, the harder you push the higher in the air it goes. If you lightly drop it, it does not bounce as high.
a pull or push of an object
force
gravity
magnets
kinetic energy
What is used to lessen the effect of friction?
Lubrication can be used to lessen this force
Can an objects velocity change while the speed stays the same?
Yes, Velocity is about speed and direction. Since an object can continue a constant speed while changing direction, then yes the velocity can change while the speed stays the same.
a change in velocity
acceleration
Are gravity and friction contact or non-contact forces? Explain why you would describe them in that way
gravity- non-contact forces
friction- contact forces
On a roller coaster, when does it have the most potential energy and the most kinetic energy?
Potential- at the top of the hill
kinetic- going down the hill
Jane spilled oil on the ground while working on a car, Jack slipped in the oil. What is the oil acting as?
a lubricant
Can the position of an object change its potential energy?
Yes, a ball at the top of a hill has more potential energy then on a flat surface.