Physics Final: proportional reasoning

Front

What does negative acceleration imply?

Back

The object is speeding up if its velocity is negative.

Front

What is the acceleration of an object if the net external force on it is zero?

Back

Zero.

Front

What is acceleration in terms of a velocity-time graph?

Back

Slope in a velocity-time graph.

Front

How is motion along a ramp best analyzed?

Back

One-dimensional motion in a rotated axis system (X axis along the ramp).

Front

What do people feel when a ride is moving upwards and slowing down?

Back

Heavier than their normal weight.

Front

Define acceleration.

Back

The rate of change of velocity of an object.

Front

What is the relationship between force and acceleration according to Newton's second law?

Back

Force equals mass times acceleration (F = ma).

Front

What is the significance of a zero net force on an object?

Back

The object will maintain its current state of motion (either at rest or moving at constant velocity).

Front

What does a positive slope on a position-time graph indicate?

Back

The object is moving away from the reference point.

Front

What is the effect of gravity on an object in free fall?

Back

The object accelerates downwards at approximately 9.81 m/s².