speed

What two measurements are necessary for calculating speed?

• Mass and time
• Temperature and mass
• Mass and distance
• Distance and time

Which graph shows: a car slowing down and coming to a stop.

• A
• B
• C
• D

Which graph shows: a car slowing down and coming to a stop.

• A
• B
• C
• D

the unit of acceleration is

• (m/s²)

• jouls

• m

• s

A positive acceleration means that your object is

• at rest

• speeding up

• moving

• slowing down

A bus starts from rest and accelerates to 14 m/s in 4 s. What is the average acceleration of the bus?

• 3.5 m/s2

• 5.9 m/s2

• 10.5 m/s2

• 24 m/s2

What is the acceleration during the first 5 seconds?

• 2 m/s²

• 4 m/s²

• 5 m/s²

• 10 m/s²

The speed of moving object relative to an observer in another moving object is called ................. speed.

• uniform

• irregular

• average

• relative

An observer in a moving car with 80 km/h was observing a moving car with 90 km/h in the same direction, so the observed speed of the second car is ................. km/h.

• 10

• 80

• 90

• 170

When a body moves at a regular speed, its average speed equals the regular speed.

• True

• False