Ch. 6

Question 0

how is instantaneous speed different from average speed?

Answer 0

Instantaneous speed- the speed at a certain moment in time

average speed- the speed for an entire trip

Question 1

What is speed?

Answer 1

the ratio of the distance an object moves to the amount of time it takes to move

Question 2

How do you find the average speed?

Answer 2

V=d/t

Velocity=distance divided by time

Question 3

What type of speed does a speedometer on a car show?

Answer 3

Instantaneous speed

Question 4

The slope on a distance-time graph represents __________.

Answer 4

speed

Question 5

Describe a change in velocity.

Answer 5

• A moving object gains speed
• A moving object changes direction
• A moving object slows down

Question 6

A river flows at a velocity of 3 km/h relative to the riverbank A boat moves upstream at a velocity of 15 km/h relative to the river What is the velocity of the boat relative to the riverbank?

Answer 6

12 km/h upstream

Question 7

The rate at which velocity changes is called what?

Answer 7

acceleration

Question 8

Because acceleration is a quantity that has both magnitude and direction, it is a ___________.

Answer 8

vector

Question 9

___________ is the result of increases and decreases in speed.

Answer 9

acceleration

Question 10

Ignoring air resistance, a rock in free fall will have a velocity of what?

Answer 10

39.2

Question 11

Describe constant acceleration.

Answer 11

a steady change in velocities

Question 12

What equation can you use to calculate the acceleration of an object?

Answer 12

A=Vf-Vi/t

Question 13

When the final velocity is ____ than the initial velocity of an object, the acceleration is negative.

Answer 13

less

Question 14

The plotted data points representing acceleration in a distance-time graph form a ______.

Answer 14

curve