Kinematics

A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s². Determine the time for the feather to fall to the surface of the moon.

Which number represents time?

• t = 1.40 s

• t = 1.67 s

• t = 2.54 s

• t = 1.29 s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A car traveling at 22.4 m/s skids to a stop in 2.55 s. Determine the skidding distance of the car (assume uniform acceleration).

What number represents time?

• t = 2.55s

• t = 22.4m/s

• t= 0m/s

• t =?

Tags

NGSS.HS-PS2-1

A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. Which number represents initial velocity?

• v₀ = 0 m/s

• v₀ = 7.10 m/s

• v₀ = 35.4 m/s

• v₀ = 9.8 m/s

A _________ quantity is completely described by magnitude alone. A _________ quantity is
completely described by a magnitude with a direction.

• vector, scalar
• scalar, vector

Speed is a __________ quantity and velocity is a __________ quantity.

• scalar, vector
• vector, scalar

A hummingbird averages a speed of about 45 km/hour (Cool facts: They visit up to 1000 flowers per day, and reach maximum speed, while diving, up to 160 km/hour!). Ruby-throated hummingbirds take a non-stop trip across Gulf of Mexico in which they fly for 18 hours straight! How far is the trip across the Gulf of Mexico at their average speed?

• 810 km
• 2.5 km
• 3.6 km
• 360 km

A car slows down from +32 m/s to +8 m/s in 4 s. The acceleration is

• -6 m/s^2

• -2m/s^2

• -8 m/s^2

• -4 m/s^2

Tags

NGSS.HS-PS2-1

An airplane accelerates down a runway at 3.20 m/s/s
for 8 s until it finally lifts off the ground.
Determine the velocity at take-off.

• 0.4 m/s
• 25.6 m/s
• 2.5 m/s

Tags

NGSS.HS-PS2-1

What is speed?

• how far you go
• how much distance is covered over a period of time
• how fast you accelerate
• the change in the location of a object

Tags

NGSS.HS-PS4-1

A change in velocity over time is known as:

• acceleration
• constant speed
• average speed
• displacement

Tags

NGSS.HS-PS2-1