Motion
What is motion?
The difference between the initial and the final position of an object.
What is force?
A push or pull on an object.
What is mass?
The amount of matter in an object.
What are the three ways heat is transferred?
Conduction, convection and radiation
Explain the law of inertia (1st)
An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
What is the difference between distance and displacement?
Distance is the length of the actual path between two locations, displacement, on the other hand, is the length of the shortest path between two locations.
What are three ways of acceleration?
speed up, slow down and change of direction
What is speed?
The measure of the distance an object travels per unit of time.
What are the units for heat and temperature?
Heat: joules
Temperature: kelvin
Explain the 3 Newton´s Laws
1. Inertia
2. Acceleration
3. Action/Reaction
What is the formula for speed?
speed = distance ÷ time.
Mention one example of a contact force and one of a noncontact force.
Examples:
contact: friction
non-contact: gravity
What is velocity?
The speed and the direction of a moving object.
Mention one example of each: conduction, convection and radiation.
Conduction: a spoon touching a hot pot.
Convection: boiling water
Radiation: the sun rays
What is the formula of force?
F= m x a
How long does it take for a train moving at 80 m/h to travel 400 meters?
5 hours
If you push a 45 kg object with a force of 30 N, and friction applies a force of 10 N in the opposite direction, what is the object's acceleration?
0.44 m/s2
What is friction?
A force that resists the motion of two surfaces that are touching.
What is the difference between heat and temperature?
Heat is the form of energy that transfers from a hot state to a cold state. However, the temperature is the measure of the hotness and coldness of an object.
We drove to the museum, and we traveled 200 km in 5 hours. What was our speed?
40 km/h
What is the difference between mass and weight?
Mass refers to the amount of matter in an object, while weight is the gravitational force acting on it.
Mention two insulators and two conductors.
Example:
Insulators: plastic, wood, cotton, wool, rubber
Conductors: gold, silver, water,