Motion Acceleration

What is the formula to calculate acceleration?

• acceleration = (final velocity * initial velocity) / time

• acceleration = (final velocity - initial velocity) / time

• acceleration = final velocity / time

• acceleration = (final velocity + initial velocity) / time

If an object has an initial velocity of 5 m/s and a final velocity of 15 m/s over a time of 3 seconds, what is its acceleration?

• 3.33 m/s^2

• 5.33 m/s^2

• 2.5 m/s^2

• 4.67 m/s^2

Explain the concept of uniformly accelerated motion.

• Uniformly accelerated motion only occurs in a vacuum.

• In uniformly accelerated motion, the object's velocity decreases over time.

• The concept of uniformly accelerated motion involves an object moving in a straight line with constant acceleration, where its velocity changes by the same amount in equal time intervals.

• Uniformly accelerated motion involves an object moving in a circular path with constant acceleration.

How does acceleration constantis differ from other types of acceleration?

• Acceleration constantis is dependent on the object's mass

• Acceleration constantis changes direction frequently

• Acceleration constantis remains constant over time, unlike other types of acceleration.

• Acceleration constantis is always negative

A car accelerates from 20 m/s to 40 m/s in 5 seconds. What is its acceleration?

• 4 m/s^2

• 2 m/s^2

• 6 m/s^2

• 10 m/s^2

What are the SI units of acceleration?

• cm/s

• m/s

• ft/s^2

• m/s^2

• km/h^2

State the three equations of motion for uniformly accelerated motion.

• s = ut + at^2

• v = u + t

• v = u + 2at

• v = u + at, s = ut + 0.5at^2, v^2 = u^2 + 2as

How does acceleration affect an object's velocity?

• Acceleration always increases an object's velocity

• Acceleration only affects an object's mass, not its velocity

• Acceleration has no effect on an object's velocity

• Acceleration affects an object's velocity by changing its speed and/or direction.

What is the acceleration of an object in free fall near the surface of the Earth?

• 8.33 m/s^2

• 9.81 m/s^2

• 5.67 m/s^2

• 10.25 m/s^2

Explain the relationship between acceleration, velocity, and time in uniformly accelerated motion.

• Acceleration is constant in uniformly accelerated motion, so velocity and time do not play a role in the relationship.

• Acceleration is the derivative of velocity with respect to time, meaning acceleration affects how velocity changes over time in a consistent manner.

• Time is the derivative of acceleration with respect to velocity, meaning time affects how acceleration changes over velocity in a consistent manner.

• Velocity is the derivative of acceleration with respect to time, meaning velocity affects how acceleration changes over time in a consistent manner.