Category 1
Which of the following does NOT cause an object to accelerate?
Change in direction, Constant velocity, Slowing down, or Speeding up
Constant velocity
Process of changing position
Motion
Total length of your path.
Distance
A push or a pull on an object.
Force
An airplane travel 290 km between Austin and Dallas in 1 hr 15 min. What is its average speed?
232 km/h
Whenever an object speed or velocity changes that object is _________________.
Changing Form or Experiencing Acceleration
What is the equation for acceleration?
Vf-Vi
______
Time
Distance between your initial or starting position and your final position.
Displacement
A noncontact attractive force that exists between all objects that have mass.
Gravity
The speed of a motorcycle increases from 10 km/hr to 50 km/hr in 9 seconds. What is its acceleration?
4.4 km/hr2
As the distance between two objects increases, the gravitational force between the objects
Decreases
The starting point you use to describe the motion or the position of an object.
Reference Point
The distance an object moves divided by the time it took to move that distance.
Speed
The speed and direction of an object's motion.
Velocity
A runner races 27 miles in 3 hours, what was their average speed?
9 mph
In order to accelerate an object must be acted on by
unbalanced forces
Which is a contact force?
A girl pulls the plug of an electric hair dryer from the socket or A leaf falls to the ground because of Earth's gravitational force
A girl pulls the plug of an electric hair dryer from the socket.
Is a push or a pull applied by one object to another object that is touching it.
Contact Force
Is a contact force that resists the sliding motion between two objects that are touching.
Friction
The speed of a train increases from 100 km/hr to 250 km/hr in 5 minutes. What is its acceleration?
30 km/hr2
In which motions are the distance and the displacement the same?
A bird flies from its nest to the ground and back to its nest or A worm moves 5 cm along a straight crack in a sidewalk
A worm moves 5 cm along a straight crack in a sidewalk.
Which represents a force pair?
A book pushes down on a table, and gravity pull the book toward the floor or A boy's foot pushes down on a bicycle pedal. The pedal pushes up on his foot.
A boy's foot pushes down on a bicycle pedal. The pedal pushes up on his foot.
Which best describes the relationship between the force acting on an object, the object's mass, and the acceleration of the object?
Newton's second law of motion, Newton's first law of motion, or Newton's law of inertia
Newton's second law of motion
When a net force acting upon an object is not 0, the force acting on the object are -
Unbalanced Forces
What is the acceleration of a baseball when its speed increases from 1 m/sec to 25 m/sec in 1 second?
24 m/s2