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Physics Exam

QuestionAnswer
Vector vs Scalar Vectors have magnitude and direction, scalars only have magnitude.
Displacement Change in position (m)
Speed How fast an object moves (m/s)
Velocity How fast an object moves with direction
Acceleration Rate at which velocity changes (m/s²)
How does velocity affect the motion of an object? The velocity of an object can change if the object's speed changes, its direction of motion changes, or they both change.
How does acceleration affect the motion of an object? If acceleration points in the same direction as the velocity, the object will be speeding up. And if the acceleration points in the opposite direction of the velocity, the object will be slowing down.
How does gravity affect falling objects? Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls
If the velocity of a particle is nonzero, can the particle’s acceleration be zero Yes, because acceleration is the change in velocity
If the velocity of a particle is zero, can the particle’s acceleration be zero Yes because acceleration is the change in velocity
If a car is traveling eastward, can its acceleration be westward? Yes, if the car is slowing down due to the opposite direction of travel.
If the average velocity of an object is zero in some time interval, what can you say about the displacement of the object during that interval? The displacement is zero and the object is at rest.
A ball is thrown vertically upward. (a) What is its velocity and acceleration when it reaches its maximum altitude? (b) What is the acceleration of the ball just before it hits the ground? Part a Velocity: 0 because the ball will be at rest Acceleration: -9.81 due to gravity Part b 9.81 because gravity is constant
Created by: XGingersnapped
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