Acceleration

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object with respect to time.

Front

True or False: Acceleration only occurs when an object speeds up.

Back

False. Acceleration can also occur when an object slows down or changes direction.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) can be calculated using the formula: a = (Vf - Vi) / t, where Vf is the final velocity, Vi is the initial velocity, and t is the time taken.

Tags

NGSS.HS-PS2-1

Front

What does it mean if an object has a constant velocity?

Back

An object has a constant velocity when it moves at the same speed in a straight line without changing direction, which means it has zero acceleration.

Front

In what scenario does a car have no acceleration?

Back

A car has no acceleration when it is moving at a constant speed, such as when cruise control is set.

Front

If a car is moving at 30 m/s and decelerates at -6.25 m/s², how can you find the time to stop?

Back

You can use the equation Vf = Vi + (a * t), where Vf is the final velocity (0 m/s), Vi is the initial velocity (30 m/s), and a is the acceleration (-6.25 m/s²).

Front

What is the acceleration of a dog that runs at 7.5 m/s and slides to a stop in 15 seconds?

Back

The acceleration is -0.5 m/s², calculated using the formula a = (Vf - Vi) / t.

Tags

NGSS.HS-PS2-1

Front

What does it indicate if an object has a positive velocity and a positive acceleration?

Back

It indicates that the object is speeding up.

Front

What is the unit of acceleration in the International System of Units (SI)?

Back

The unit of acceleration in SI is meters per second squared (m/s²).

Front

What is the difference between positive and negative acceleration?

Back

Positive acceleration indicates an increase in velocity, while negative acceleration (deceleration) indicates a decrease in velocity.