Physics: Acceleration and Freefall Flashcard

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object with respect to time. It can be positive (speeding up) or negative (slowing down).

Front

What does a graph with a horizontal line represent in terms of motion?

Back

A horizontal line on a velocity-time graph indicates zero acceleration, meaning the object is moving at a constant velocity.

Front

What is the velocity of an object at the highest point of its trajectory when thrown straight up?

Back

The velocity at the highest point is 0.0 m/s.

Front

What is the formula to calculate acceleration?

Back

Acceleration (a) can be calculated using the formula: a = (final velocity - initial velocity) / time.

Front

If a golf ball accelerates at 15 m/s² and reaches a velocity of 50 m/s from rest, how long does it take to accelerate?

Back

It takes 3.3 seconds to accelerate.

Front

In a vacuum, which object will hit the ground first if dropped from the same height: a feather or an elephant?

Back

They will hit the ground at the same time.

Front

What is the relationship between velocity and acceleration when a car is speeding up while traveling forward?

Back

The car has positive velocity and positive acceleration.

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only, with no other forces acting on it.

Front

What is the acceleration due to gravity on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.81 m/s².

Front

What happens to the velocity of an object in free fall as it descends?

Back

The velocity of an object in free fall increases as it descends due to the acceleration of gravity.