Question

speed is the rate of motion of an object. and direction. the velocity of an object can describes an object’s speed even if the speed of the object remains constant. this would occur if the of the object’s motion changes. the rate of change of velocity is called. the size of an acceleration depends on both the change in velocity and the of the change. to calculate acceleration, the change in velocity by the time interval. to find the change in velocity, the initial velocity (vᵢ) from the final velocity (vբ). the equation for average acceleration is. final velocity will be less than initial velocity if an object is, and acceleration will have a value. final velocity will be greater than initial velocity if an object is, and acceleration will have a value. the units for velocity are. the unit for time is. therefore, the units for acceleration are.

Explanation:

Velocity is a vector - it has speed and direction. If direction changes while speed is constant, velocity changes. Acceleration is the rate of change of velocity, calculated as the change in velocity divided by the time interval. Deceleration (negative acceleration) occurs when final velocity is less than initial velocity, and acceleration is positive when final velocity is greater. Velocity units are distance per time (e.g., m/s), time unit is second (s), and acceleration units are distance per time - squared (e.g., m/s²).

Answer:

1. Velocity
2. Change
3. Direction
4. Acceleration
5. Time interval
6. Divide
7. Subtract
8. $a=\frac{v_f - v_i}{\Delta t}$
9. Decelerating
10. Negative
11. Accelerating
12. Positive
13. Distance per time (e.g., m/s)
14. Second (s)
15. Distance per time - squared (e.g., m/s²)