Speed, Velocity, and Acceleration

What is the formula to calculate average speed?

• total distance plus total time

• total distance minus total time

• total distance divided by total time

• total distance multiplied by total time

Tags

NGSS.MS-PS3-1

Define instantaneous speed.

• The instantaneous speed is the speed of an object at a specific point in time.

• The instantaneous speed is the speed of an object at rest.

• The instantaneous speed is the maximum speed that an object can reach.

• The instantaneous speed is the average speed of an object over a period of time.

What is positive acceleration?

• Positive acceleration is the rate at which an object's velocity remains constant over time.

• Positive acceleration is the rate at which an object's velocity decreases over time.

• Positive acceleration is the rate at which an object's velocity changes direction over time.

• Positive acceleration is the rate at which an object's velocity increases over time.

What is negative acceleration?

• The rate at which an object slows down.

• The rate at which an object speeds up.

• The rate at which an object maintains its speed.

• The rate at which an object changes direction.

A car travels 200 km in 4 hours. What is its average speed?

• 40 km/h

• 60 km/h

• 50 km/h

• 100 km/h

Tags

NGSS.MS-PS3-1

A ball is thrown vertically upwards. What is its instantaneous speed at the highest point?

• 20 m/s

• 0

• 5 m/s

• 10 m/s

Tags

NGSS.MS-PS3-1

A car accelerates from 0 m/s to 20 m/s in 5 seconds. What is its acceleration?

• 10 m/s^2

• 2 m/s^2

• 4 m/s^2

• 6 m/s^2

Tags

NGSS.HS-PS2-1

A car decelerates from 30 m/s to 10 m/s in 4 seconds. What is its acceleration?

• -2.5 m/s^2

• 10 m/s^2

• 0 m/s^2

• -5 m/s^2

Tags

NGSS.HS-PS2-1

A train accelerates uniformly from rest to a speed of 80 km/h in 20 seconds. What is its acceleration?

• 1.11 m/s^2

• 2.5 m/s^2

• 5 m/s^2

• 0.5 m/s^2

Tags

NGSS.MS-PS2-2

A rocket slows down uniformly from a speed of 500 m/s to 200 m/s in 10 seconds. What is its acceleration?

• 30 m/s^2

• 50 m/s^2

• 100 m/s^2

• -30 m/s^2

Tags

NGSS.HS-PS2-1