Kinematics

Velocity is...

• The rate of change of acceleration

• The rate of change of displacement

• The rate of change of distance

• The rate of change of speed

What is the difference between a vector quantity and a scalar quantity?

• A scalar has a magnitude and direction and a vector has only a magnitude

• A vector has a magnitude and direction and a scalar has only a magnitude

• A scalar has a direction and a vector has a magnitude

• None of the above

An unladen swallow flies 5 m/s. How far has the bird traveled after 1 min?

• 5 m

• 12 m

• 120 m

• 300 m

Tags

NGSS.MS-PS3-1

Which of the following is a vector quantity?

• Velocity

• Acceleration

• Displacement

• All of the above

Motion sensors recorded the following data about a runner during a cross-country race. During which segment of the race did the runner have the greatest speed?

• W
• X
• Y
• Z

What is the acceleration of an object moving at constant velocity?

• 2 m/s²

• 1 m/s²

• 0 m/s²

• 0.8 m/s²

Tags

NGSS.HS-PS2-1

When velocity is negative and acceleration is negative, what happens to the object’s motion?

• The object slows down

• The object speeds up

• Nothing happens to the objects motion

• The object remains at rest

Tags

NGSS.HS-PS2-1

A dolphin swims 1.85 km/hr. How far has the dolphin travelled after 0.6hr?

• 1.1 km

• 2.5 km

• 0.63 km

• 3.7 km

A coin released from rest from the top of a tower hits the ground after 1.5 seconds. What is the speed of the coin as it hits the ground?

• 15 m/s

• 21 m/s

• 31 m/s

• 39 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

The graph shows the position of a truck vs. time. According to the graph, the velocity of the truck is...

• increasing

• remaining constant

• decreasing