PS Unit 4 Review

Front

What is lift?

Back

The upward force acting on the wind of an airplane in flight.

Front

What do unbalanced forces acting on an object cause?

Back

They cause the object to accelerate.

Front

What does an object following a straight-line path at constant speed have?

Back

Zero acceleration.

Front

What is the force associated with charged particles?

Back

Electromagnetic force.

Front

What force is responsible for the orbits of the planets in the solar system?

Back

Gravitational force (gravity).

Front

Define gravitational force.

Back

The attractive force between two masses.

Front

What is acceleration?

Back

The rate of change of velocity of an object.

Front

What is the relationship between mass and gravitational force?

Back

Gravitational force increases with mass.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.

Front

What is the formula for calculating force?

Back

Force = mass × acceleration (F = ma).