Modified if True Or False:
A. If the 1st statements is True and 2nd is False
B. If the 1st statements False and the 2nd is True
C. If both statements are True
D. If both Statements are False
Answer:
__C__1. A. An object is in motion if its position changes relative to another object.
B. Velocity must have a measurement of speed
and direction below.
__A__2 A. Distance and displacement are equal.
B. Distance is less than displacement .
__B__3. A. When a car goes around a corner at 20 mph, the car is accelerating because it's changing direction.
B. A value that only has magnitude is called scalar
__B__4. A. Speed is a vector quantity.
B. A car is speeding up while traveling forward when its velocity is positive and its acceleration is also positive.
Explanation:
1. A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point.
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
2. Distance is always greater than or equal to displacement. Distance:It is the actual path length travelled by an object within a specified time interval. Displacement:Displacement is the shortest length between starting and stopping point of that object.
3. When a car goes around a corner at a constant speed of 20 mph, why do we say it accelerates? The car is accelerating because of the velocity is constant. The car accelerates because the speed is constant at 20 mph.
Vectors have magnitude and direction, scalars only have magnitude.
4. Speed is a scalar quantity because it does not need a direction of motion, it only needs magnitude.
When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration.
