Motion Quiz 2

What is the definition of speed in physics?

• The displacement of an object per unit time

• The distance traveled by an object per unit time

• The rate of change of velocity

• The total path length divided by time

Tags

NGSS.MS-PS3-1

If a car travels 300 km in 4 hours, what is its average speed?

• 75 km/h

• 1200 km/h

• 100 km/h

• 25 km/h

What is the main difference between speed and velocity?

• Speed is a scalar quantity, while velocity is a vector quantity.

• Speed can be negative, while velocity cannot.

• Velocity is measured in meters, while speed is measured in meters per second.

• There is no difference; they are the same.

How do you calculate the displacement of an object?

• By multiplying the velocity by the time

• By adding the initial position to the final position

• By subtracting the initial position from the final position

• By dividing the distance by the time

What is a vector?

• A quantity that has only magnitude

• A quantity that has both magnitude and direction

• A path taken by an object

• A type of speed

If a person walks 4 km East, then 3 km South, what is the total distance they walked?

• 5 km

• 7 km

• 12 km

• 3 km

If a bird flies at a velocity of 10 m/s north for 30 seconds, what is its displacement?

• 300 m North

• 300 m South

• 10 m North

• 30 m North

What unit is commonly used to measure velocity?

• Kilograms

• Meters per second (m/s)

• Meters (m)

• Seconds (s)

Tags

NGSS.MS-PS3-1

If an object moves in a circular path and returns to its starting point, what is its displacement?

• Equal to the circumference of the circle

• Zero

• Depends on the radius of the circle

• Cannot be determined without knowing the speed

Wind pushes a toy sailboat across a pond. The boat moves in a straight path. What is changing?

• the boat's direction

• the wind's direction

• the boat's path

• the boat's position

Tags

NGSS.MS-ESS2-5