ch2: Describing Motion

Question 1

Distance covered

Answer 1

is the length of the path taken by a moving object.

Question 2

Average speed

Answer 2

total distance travelled by an object divided by total time.

Question 3

uniform speed

Answer 3

An object travels the same distance in equal intervals of time.

Question 4

stationary or at rest

Answer 4

An object has zero speed.

Question 5

Instantaneous speed

Answer 5

speed of an object at any given moment

Question 6

Displacement

Answer 6

is the straight-line distance in a specified direction from an origin. It is a vector quantity.

Question 7

vector

Answer 7

any physical quantity that has magnitude and direction.

Question 8

scalar

Answer 8

any physical quantity that only has magnitude.

Question 9

Velocity

Answer 9

is given by the change in displacement per unit time.

Question 10

uniform velocity

Answer 10

An objects displacement changes by the same amount in equal intervals of time.

Question 11

Acceleration

Answer 11

is given by the change in velocity per unit time.